Klein + Hummel O 410 Operating Manual

Operating Manual

Operating ManualOperating Manual

Operating Manual

O 410

Part Number

Part NumberPart Number

Part Number: 526312 Version

VersionVersion

Version: 03 Date

DateDate

Date: 25-Jun-2008 Language

LanguageLanguage

Language: English, Française, Deutsch, Español

O 410

Active

Mid-Field Monitor

Table of Contents

Table of ContentsTable of Contents

Table of Contents

English

EnglishEnglish

English

Introduction................................................................................................................................................................1

Package Contents......................................................................................................................................................1

Most Common Applications and Listening Distances .......................................................................................1

System Block Diagram .............................................................................................................................................1

Electronics Panel Picture..........................................................................................................................................2

Input Stage .................................................................................................................................................................3

Acoustical Controls....................................................................................................................................................3

Other Controls ............................................................................................................................................................5

Crossover.....................................................................................................................................................................6

Amplifiers....................................................................................................................................................................7

Drivers..........................................................................................................................................................................7

O 410 Mathematically Modeled Dispersion™ Waveguide (MMD™) ..............................................................7

Cabinet.........................................................................................................................................................................8

System Use .................................................................................................................................................................9

Technical Specifications ........................................................................................................................................ 10

Acoustical Measurements .................................................................................................................................... 11

Accessories and Options ....................................................................................................................................... 12

Safety and Warnings............................................................................................................................................. 16

Maintenance and Servicing .................................................................................................................................. 17

Guarantee................................................................................................................................................................. 17

Recycling .................................................................................................................................................................. 17

EC Declaration of Conformity............................................................................................................................... 18

Française

FrançaiseFrançaise

Française

Introduction............................................................................................................................................................. 23

Contenu du carton.................................................................................................................................................. 23

Applications habituelles et distances d’écoute............................................................................................... 23

Synoptique............................................................................................................................................................... 23

Photo du panneau arrière..................................................................................................................................... 24

Étage d’entrée......................................................................................................................................................... 25

Réglages acoustiques............................................................................................................................................ 25

Autres commandes ................................................................................................................................................ 27

Crossover (filtre actif) ........................................................................................................................................... 28

Amplificateurs......................................................................................................................................................... 29

Transducteurs ......................................................................................................................................................... 29

Guide d’onde MMD™ (Mathematically Modeled Dispersion™ Waveguide) de l’O 410 ..........................29

Coffret....................................................................................................................................................................... 30

Utilisation de l’enceinte ........................................................................................................................................ 31

Caractéristiques Techniques ................................................................................................................................ 33

Mesures acoustiques ............................................................................................................................................. 34

Accessoires et Options .......................................................................................................................................... 35

Sécurité et avertissements .................................................................................................................................. 39

Utilisation................................................................................................................................................................. 40

Garantie.................................................................................................................................................................... 40

Recyclage.................................................................................................................................................................. 40

Déclaration de Conformité CE ..............................................................................................................................41

Deutsch

DeutschDeutsch

Deutsch

Einleitung ................................................................................................................................................................. 44

Lieferumfang........................................................................................................................................................... 44

Die häufigsten Anwendungen und Hörabstände ........................................................................................... 44

System-Blockdiagramm........................................................................................................................................ 44

Elektronikfeld.......................................................................................................................................................... 45

Input Stage ..............................................................................................................................................................46

Akustikregler/Acoustical Controls...................................................................................................................... 46

Weitere Regler ........................................................................................................................................................ 48

Crossover/Frequenzweiche .................................................................................................................................. 49

Verstärker ................................................................................................................................................................ 50

Treiber....................................................................................................................................................................... 50

O 410 Mathematically Modeled Dispersion™ Waveguide (MMD™) ........................................................... 50

Gehäuse ....................................................................................................................................................................51

Einsatz des Systems .............................................................................................................................................. 52

Technische Daten ...................................................................................................................................................54

Akustische Messungen ......................................................................................................................................... 55

Zubehör und Sonderzubehör............................................................................................................................... 55

Sicherheits- und Warnhinweise .......................................................................................................................... 60

Instandhaltung und Wartung.............................................................................................................................. 61

Garantie.................................................................................................................................................................... 61

Recycling .................................................................................................................................................................. 62

Konformitätserklärung ......................................................................................................................................... 62

Español

EspañolEspañol

Español

Introducción............................................................................................................................................................. 64

Contenido del paquete .......................................................................................................................................... 64

Aplicaciones más comunes................................................................................................................................... 64

Diagrama de conjunto del sistema..................................................................................................................... 64

Imagen del panel de circuitos electrónicos....................................................................................................... 65

Etapa de entrada.................................................................................................................................................... 66

Controles de sonido ............................................................................................................................................... 66

Otros controles........................................................................................................................................................ 68

Crossover.................................................................................................................................................................. 69

Amplificadores ........................................................................................................................................................ 70

Bocinas...................................................................................................................................................................... 70

Guía de onda con Mathematically Modeled Dispersion™ (MMD™)............................................................. 70

Gabinete ................................................................................................................................................................... 71

Uso del sistema....................................................................................................................................................... 72

Especificaciones técnicas ...................................................................................................................................... 74

Mediciones acústicas ............................................................................................................................................. 75

Opciones y accesorios............................................................................................................................................ 76

Instrucciones de seguridad .................................................................................................................................. 80

Servicio y mantenimiento .................................................................................................................................... 81

Garantía.................................................................................................................................................................... 81

Reciclado................................................................................................................................................................... 82

Declaración de Conformidad con las directivas de la Comunidad Europea ............................................... 82

Klein + Hummel O 410 Operating Manual

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Introduction

IntroductionIntroduction

Introduction

Thank-you for purchasing a Klein + Hummel loudspeaker. A Mathematically Modeled Dispersion™ waveguide (MMD™), flexible acoustical controls, various input options and an extensive mounting hardware range allow the loudspeaker to be used in diverse acoustical conditions, with any source equipment and in a wide variety physical locations. The latest acoustical and electrical techniques and components have been used to ensure the most accurate sound reproduction possible. Klein + Hummel products are designed for longevity so we hope you enjoy many happy years of using this product.

Depending on the size, Klein + Hummel’s three-way systems are designed for use as near field monitors through to large main control room monitors. They can be used in music, broadcast, and post production studios for tracking, mixing, and mastering. They may be positioned used free-standing or flush mounted into a wall, and can be mixed freely in multichannel systems.

Before reading the rest of this operating manual, review the safety and warnings section towards the back of this book. Note that imperial dimensions are approximate.

Package Contents

Package ContentsPackage Contents

Package Contents

The shipping carton contains:

• This operating manual

• Product guarantee

• The loudspeaker

• Three mains power cables (Euro, UK, and USA)

• A trimmer and switch screwdriver

Signal cables are not included. Options and accessories are listed at the end of this operating manual.

Most Common Applications and Listening Distances

Most Common Applications and Listening DistancesMost Common Applications and Listening Distances

Most Common Applications and Listening Distances

The minimum, recommended, and maximum listening distances are shown below, together with their most common application:

DiDi

Distances

stancesstances

stances

Product

ProductProduct

Product Most Common Application

Most Common ApplicationMost Common Application

Most Common Application Minimum

MinimumMinimum

Minimum Recommended

RecommendedRecommended

Recommended

Maximum

MaximumMaximum

Maximum

O 410 Mid-field monitoring 1.5 m (5’) 2.5 m (8) 8 m (24’)

In multichannel systems, one should ideally use the same product for all main channels. However, as the rear channels often contain less bass and the signals are mixed at a lower level than the front channels, the rear loudspeakers can be smaller - table below for details. The center loudspeaker should always be of the same type as the left and right loudspeaker. The subwoofer should be sufficient to keep up with the main loudspeakers - see subwoofer operating manual for details.

Front

FrontFront

Front Ideal Rears

Ideal RearsIdeal Rears

Ideal Rears Smaller Rears

Smaller RearsSmaller Rears

Smaller Rears Subwoofer(s)

Subwoofer(s)Subwoofer(s)

Subwoofer(s)

O 410 O 410 O 300, O 300 D Refer to subwoofer operating manuals

System Block Diagram

System Block DiagramSystem Block Diagram

System Block Diagram

Below is a three-way system block diagram.

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Refer to the detailed product specifications section for information on the crossover frequencies, amplifier power, and driver types. In an O 410, the Low Mid / Mid control is a Mid control. As the digital option is user installable, there is no “D” version of the O 410.

Electronics Panel Picture

Electronics Panel PictureElectronics Panel Picture

Electronics Panel Picture

O 410 electronics panel

O 410 electronics panelO 410 electronics panel

O 410 electronics panel

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Input Stage

Input StageInput Stage

Input Stage

The standard input stage

standard input stagestandard input stage

standard input stage is a 14 kΩ electronically balanced type on a female XLR socket.

PinPin

Pin Signal

SignalSignal

Signal 1 Audio Ground 2 Positive 3 Negative

If there is a humming or buzzing sound coming from the loudspeaker, first check it is not the loudspeaker by disconnection the input signal cables. If the noise goes away it is not the loudspeaker itself and so the noises must be coming from the cabling or the source. There are various ways to increase the loudspeaker’s immunity from these external noises:

• Use input ground lift switch

input ground lift switchinput ground lift switch

input ground lift switch to disconnect the audio ground, on pin 1 of the analog XLR input, from the electronics’ chassis ground. For safety reasons, the electronics chassis ground is always connected to the mains power earth pin.

• Fit an optional transformer balanced input stage

optional transformer balanced input stageoptional transformer balanced input stage

optional transformer balanced input stage to the loudspeaker. This is especially effective when

combined with the ground lift switch.

• If unbalanced cables are used, they can be specially wired – see picture below. Disconnect the cable screen

from the RCA sleeve if there are still humming or buzzing sounds, and/or use the ground lift switch on the loudspeaker.

In addition, it is possible to fit a 24

2424

24----bit, 192 kHz digital input stage

bit, 192 kHz digital input stagebit, 192 kHz digital input stage

bit, 192 kHz digital input stage. It has XLR and BNC inputs, and a BNC output, so it is possible to have analog and digital signals simultaneously connected; the selector switch is used to monitor the selected input.

Acoustical Controls

Acoustical ControlsAcoustical Controls

Acoustical Controls

The acoustical controls are low-order analog filters designed to compensate for some of the acoustical issues commonly found in listening environments. There is either a Low Mid or Mid control depending on the loudspeaker model. The other controls are seen on all three-way systems.

Klein + Hummel loudspeakers are designed to have a flat pass band magnitude response in anechoic conditions when all the acoustical controls are set to 0 dB. When a loudspeaker is installed into a listening environment the response changes and thus should be corrected back to a flat response. It is therefore expected that the controls will need adjustment to improve the in-situ response of the loudspeaker. The acoustical controls’ settings will depend on the loudspeaker’s location and will probably be different for the same loudspeaker type installed in different locations in the same room. In a symmetrical installation, left/right pairs (front or back) will probably have the same acoustical settings. Suggested settings are shown after this description of the controls:

The bass

bassbass

bass control is used to compensate for the effect of loading due to nearby large solid boundaries such as

walls. Four settings are available: 0, -2.5, -5, and -7.5 dB.

The mid

midmid

mid control (O 410) is used to compensate for strong first order reflections (floor, ceiling, side walls), that may cause an aggressiveness in the midrange sound quality. A high mid-band reverberation time can also have this effect and thus be compensated. Four settings are available: 0, -1.5, -3, and -4.5 dB.

The treble

trebletreble

treble control affects the treble driver output level and can be used to compensate for insufficient or excessive high frequency damping in the room. The treble control is often set to suit the listener’s taste, although in well-controlled environments there should be little reason to adjust it away from 0 dB. Four settings are available: +1, 0, -1, and -2 dB.

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The parametric

parametricparametric

parametric equalizer is a single stage PEQ filter with gain (+4…-12 dB), frequency (20…200 Hz) and Q (1…8) controls designed to control nonlinearities seen below 200 Hz. These nonlinearities can come from boosts caused by constructive interference or strong room modes. It is possible to bypass the parametric equalizer using the bypass switch.

It is advised that an acoustical measurement system be used to set these controls in the most appropriate way for the loudspeaker’s location. This is especially true of the parametric equalizer’s controls. In the absence of appropriate equipment the following settings are recommended as a good starting point for further adjustment:

Acoustical Controls

Acoustical ControlsAcoustical Controls

Acoustical Controls

Loudspeaker Location

Loudspeaker LocationLoudspeaker Location

Loudspeaker Location

Bass

BassBass

Bass Mid

MidMid

Mid

O 410

Treble

TrebleTreble

Treble Parametric

ParametricParametric

Parametric

In a corner -7.5 dB - - ***

******

*** Next to or flush mounted in a solid wall -5 dB - - Next to or flush mounted in a soft wall -2.5 dB - - Free standing in an untreated room -2.5 dB -1.5 dB -1 dB ***

******

*** Free standing in a well-treated room - - - -

***

******

*** This indicates that the parametric equalizer will probably need to be used. Its use will depend on the situation so no standard recommendation can be made here.

O 410 Bass, Midrange and Treble Acoustical Controls

O 410 Bass, Midrange and Treble Acoustical ControlsO 410 Bass, Midrange and Treble Acoustical Controls

O 410 Bass, Midrange and Treble Acoustical Controls O 410 Parametric EQ Acoustical Controls

O 410 Parametric EQ Acoustical ControlsO 410 Parametric EQ Acoustical Controls

O 410 Parametric EQ Acoustical Controls

Note:

Note:Note:

Note: the parametric equalizer’s response is not shown on the above graphs as it is freely adjustable within the stated parameter ranges.

The input

input input

input and output

output output

output controls consist of a finely graduated control called “Input Gain

Input GainInput Gain

Input Gain” and a coarse “Output

Output Output

Output

Level

LevelLevel

Level” control. This allows the loudspeaker to be matched to a wide range of equipment outputs whilst maintaining the desired acoustical output. As with any other component in the audio chain, it is best to use the lowest gain for the application so as to minimize amplification of the preceding equipment’s source noise. To check this, if the noise drops dramatically when the input cable is unplugged, the noise is coming from the source not the loudspeaker. The default setting is “0 dB” and “100 dB SPL at 1m”. This gives an output level of 100 dB SPL at 1m when the input signal is 0 dBu (0.775 V). The most sensitive setting (most acoustical output for a given input voltage) is “6 dB” and “114 dB SPL at 1m”, and the least sensitive setting is “-9 dB” and “100 dB SPL at 1m”.

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Acoustic output level [dB SPL] of the loudspeaker at 1m

Acoustic output level [dB SPL] of the loudspeaker at 1mAcoustic output level [dB SPL] of the loudspeaker at 1m

Acoustic output level [dB SPL] of the loudspeaker at 1m

when input signal is 0 dBu

when input signal is 0 dBuwhen input signal is 0 dBu

when input signal is 0 dBu

Input Sensitivi

Input SensitiviInput Sensitivi

Input Sensitivity

ty ty

Rotary Switch [dB]

Rotary Switch [dB]Rotary Switch [dB]

Rotary Switch [dB]

Output Level switch = “100 dB”

Output Level switch = “100 dB”Output Level switch = “100 dB”

Output Level switch = “100 dB” Output Level switch = “114 dB”

Output Level switch = “114 dB”Output Level switch = “114 dB”

Output Level switch = “114 dB”

-9 dB 91 105

-8 dB 92 106

-7 dB 93 107

-6 dB 94 108

-5 dB 95 109

-4 dB 96 110

-3 dB 97 111

-2 dB 98 112

-1 dB 99 113 0 dB 100 (default) 114 1 dB 101 115 2 dB 102 116 3 dB 103 117 4 dB 104 118 5 dB 105 119 6 dB 106 120

Below are some examples of how to calculate the output level:

Input signal [dBu] 0 (0.775 V) +4 (1.23 V) +6 (1.55 V) +16 (4.89 V) Input gain setting [dB] 0 0 0 0 Output level setting [dB SPL] 100 100 100 100

Sound Output of Loudspeaker [dB SPL at 1m] 100 104 106 116

In Europe 0 dBu is -18 dBFS (EBU standard R68). In the US +4 dBu is -20 dBFS (SMPTE standard RP155). These dBu values should equate to 85 dB SPL at the listening position. It is typical in the broadcast industry to use a reference level of 79 dB SPL at the listening position. Near field loudspeakers can be as close as 1 m from the listening position, whereas loudspeakers in a Dolby certified movie mixing room should be at least 5 m from the listening position. In the examples below, it is assumed that the listener is inside the room radius and thus the sound field decays according to 20 log10 (r), however this may not always be the case. Note that some additional attenuation at the source (-6 or -10 dB) is required for SPL calibrated near field listening, but this facility is always available in the console.

Input signal [dBu] 0 (0.775 V) +4 (1.23 V) Input level setting [dB] -1 -5 Output level setting [dB SPL] 100 100 Listening distance [m] (dB change) 5 m (-14 dB) 5 m (-14 dB)

Loudspeaker Output Level [dB SPL] 85 85 Maximum input signal before clipping 17 dBu 17 dBu

The maximum input level that the input stage can accept is +19 dBu (approximately 6.9 V). To avoid clipping the input stage, increase the input level of the loudspeaker by up to 6 dB. The maximum acoustical output of the loudspeaker is limited by the protection system. In general, larger loudspeakers can play louder and for longer periods than smaller loudspeakers.

Other Controls

Other ControlsOther Controls

Other Controls

The display dimmer

display dimmerdisplay dimmer

display dimmer is used to attenuate the display when the loudspeaker is used in low light situations. The display can be completely turned off for use behind acoustically transparent screens. Four settings are available: 100, 66, 33, and 0 %.

The power On/Off

power On/Offpower On/Off

power On/Off switch turns the mains power completely on and off. There is a soft start function in the power supply to reduce the effect of turn-on transients on the power line, thereby avoiding blown fuses.

The voltage selector

voltage selectorvoltage selector

voltage selector switches select between 230, 120, and 100 V. Set this appropriately BEFORE applying main power to the loudspeaker. An appropriate internal main fuse value is automatically selected. The applied mains power voltage should be within -15% and +10% of the selected value.

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The 12 V trigger

12 V trigger12 V trigger

12 V trigger is used to turn the loudspeaker on and off remotely without having the use the mains power switch. This may be useful in a large facility where the whole room is powered-up using a single switch. Equipment can be time-delayed using simple low-voltage circuitry so there is not a mains power surge, although there is already the soft start function to reduce this effect. Note that loudspeaker’s electronics are fully powered on and off with this control, so the startup time is subject to the same on/off muting delays as if the loudspeaker had been turned off and on using the main power switch. There are two modes of operation, which are selected using an internal switch (see picture below):

Remote Power

Remote Power Remote Power

Remote Power Mode

ModeMode

Mode

Switch Position

Switch PositionSwitch Position

Switch Position Function

FunctionFunction

Function

“12 V TURNS OFF”

Away from

backplate

Applying 12 V across the remote terminals turns OFF the loudspeaker Removing the 12 V from the remote terminals turns ON the loudspeaker

“12 V TURNS ON” Towards

backplate

Applying 12 V across the remote terminals turns ON the loudspeaker Removing the 12 V from the remote terminals turns OFF the loudspeaker

The factory default mode setting is “12 V TURNS OFF”. In both modes and with either applied voltage levels at the terminals, switching the mains power switch to “OFF” will turn off the loudspeaker.

To change the remote power mode to “12V TURNS ON”:

• Turn off the loudspeaker and disconnect the mains power and signal cables.

• Open the electronics panel (located in the cabinet or remote electronics kit).

• Locate the large switch on the mains power circuit board and move the switch towards the backplate.

• Close the electronics panel and reattach the mains power and signal cables.

• Power up the loudspeaker, apply 12V to the remote control terminals, and check that the appropriate lights

are illuminated.

Crossover

CrossoverCrossover

Crossover

Using 4th order filters, the crossover divides the input signal into three bands for reproduction by the appropriate sized driver. Time alignment ensures that the sound from each driver around the crossover frequencies is emitted at the same time. In addition to this an extensive protection system ensures that the loudspeaker is not damaged if a large signal is applied to the input. The red “PROTECT” lights up when the protection system is active. If this happens, reduce the input signal. If this happens regularly, use a larger loudspeaker with a higher SPL output, or add a subwoofer to handle the high-level low-frequency energy. The protection system consists of: thermal and peak limiters for the amplifiers, thermal modeling of the drivers, and an excursion limiter for the drivers.

The protection system is not a compressor, it is designed to protect the loudspeaker from damage, and the red light tells the user it is active. The protection cannot protect against sustained abuse of the loudspeaker, i.e. consistently playing the loudspeaker for long periods of time with the protect light on, so avoid this to ensure a long life from this product.

There are also production trimmers in the crossover section which are hidden from view to avoid “accidental” adjustment. These should only be adjusted by qualified personnel with specialized measurement equipment.

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If a component critical for sound quality, e.g. bass driver, is changed, the loudspeaker should ideally be recalibrated in a Klein + Hummel Continental Service Center, i.e. one equipped with an anechoic chamber.

Amplifiers

AmplifiersAmplifiers

Amplifiers

Hybrid class AB amplifiers are used because, for full range loudspeakers, the overall performance is still better than any other solution. Harmonic and intermodulation distortions, and noise are all consistently low in welldesigned class AB amplifiers. Heat dissipation is reduced by using class H techniques for each amplifier channel to seamlessly lower the amplifier power supply voltage when the input signal is low. Even so some space (5 cm, 2”) is required around the electronics panel.

Accelerated Heat Tunneling™ (AHT™) is a technique designed to ensure equally effective cooling of the amplifiers, whether the cabinet is mounted vertically or horizontally. The “funnel effect” accelerates cool air into the lower heatsink aperture and expels heated air from the upper heatsink aperture. It is recommended that the amplifier heatsink is checked for any build-up of dust and fluff at least every six months. The heatsinks can be cleaned without having to open the electronics panel: simply blow clean compressed air into the vents on the side of the electronics panel and across the external heatsink. Failure to do this may limit maximum SPL output.

If the cabinet is flush mounted it is highly recommended that the electronics panel be mounted on a Remote Electronics Kit – see Accessories and Options section. Although no damage will result, insufficient cooling will cause the amplifier protection to activate prematurely thereby limiting the system’s maximum output level.

Drivers

DriversDrivers

Drivers

The drivers are the best available for their application. Long throw, efficient, low distortion drivers ensure a clean sound quality even at high replay levels. The bass driver is loaded by the internal volume of the cabinet. The mid and treble drivers have their own self-contained back cavities. All drivers are magnetically shielded for use next to CRT screens. The system’s SPL output and the cabinet volume can be seen in the specifications section below.

O 410 Mathematically Modeled Dispersion™ Waveguide (MMD™)

O 410 Mathematically Modeled Dispersion™ Waveguide (MMD™)O 410 Mathematically Modeled Dispersion™ Waveguide (MMD™)

O 410 Mathematically Modeled Dispersion™ Waveguide (MMD™)

The midrange and treble drivers are mounted into a Mathematically Modeled Dispersion™ waveguide (MMD™). The MMD™ is made from the same acoustically excellent material used in the O 300, LRIM™. It has been mathematically modeled and experimentally verified in an anechoic chamber to give optimum control of the directivity of the midrange and treble drivers. The benefits are increased driver loading, reduced edge diffraction and room reflections, a smoother power response and a wide useable listening area. The result is a reduced audio distortion and a corresponding sound quality improvement. The MMD™ has 80° x 60° dispersion and so, if the loudspeaker is horizontally mounted, must be rotated 90° in either direction from the position it which it was supplied. A rotated waveguide allows the bass driver to be placed either side of the MMD™. If the cabinet is positioned upside down, the MMD™ should also be upside down to maintain an optimum midrange-bass crossover region. As the display text is then upside-down, please contact K+H in Germany directly to get a replacement display sticker with upside-down text. In all cabinet orientations, the acoustical axis should point towards the engineer’s listening position, or the center of the listening area, in both the horizontal and vertical planes – see Cabinet section for a definition of the acoustical axis.

This is how to rotate the MMD™:

• Lay the loudspeaker cabinet on its back on a soft flat surface so the drivers are facing upwards.

• Undo the four Allen head bolts on the MMD™ using a T4 Allen head screwdriver.

• Carefully lift the MMD™ out of the cabinet, avoiding scratches on the paintwork and damage to the sealing

strip.

• Reposition the MMD™ in the new orientation and centre it in the front panel cut-out.

• Tighten the four Allen head bolts on the MMD™ to a torque setting of 3,7 Nm (2,73 lbf-ft).

• Test the cabinet sealing by playing a reasonably loud (so you can feel some wind through the ports) sine

wave with a frequency equal to the loudspeaker’s -3 dB low frequency cut off (see specifications below).

Then listen for any hissing sounds around the edge of MMD™ and its drivers. If there is a hissing sound, the

sealing has been compromised and should be repaired.

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Cabinet

CabinetCabinet

Cabinet

The wooden cabinet is painted using a standard RAL color. An appropriately colored pen can be used to touch up the paintwork if it is scratched during transport or use. The following RAL numbers correspond to K+H standard cabinet colors.

K+H Color Name

K+H Color NameK+H Color Name

K+H Color Name RAL Number

RAL NumberRAL Number

RAL Number

Anthracite 7021

Silver 9006

Combined with the cabinet volume, the ports load the bass driver to extend the low frequency response of the loudspeaker. The ports have a high capacity to move air without inducing turbulence and associated nonlinearities that degrade the sound quality.

The acoustical axis is a line normal to the loudspeaker’s front panel along which the microphone was placed when tuning the loudspeaker’s crossover during design. Pointing the acoustical axis, in the horizontal and vertical planes, towards the listening position or centre of the listening area will give the best measured and perceived sound quality. For three-way loudspeakers in the Klein + Hummel range, the acoustical axis is located on the midpoint of the midrange and tweeter drivers.

Product

ProductProduct

Product x dimension

x dimensionx dimension

x dimension y dimension

y dimensiony dimension

y dimension

O 410 16.5 cm (6 1/2“) 51 cm (20 1/8“)

O 410 Acoustical Axis

O 410 Acoustical AxisO 410 Acoustical Axis

O 410 Acoustical Axis

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System Use

System UseSystem Use

System Use

Klein + Hummel loudspeakers should only be used indoors and in these ambient conditions:

• +10° C to +40° C (+50° F to +104° F), <90% relative humidity, non-condensing

During transport or storage the ambient conditions can be:

• -25° C to +70° C (-13° F to 158° F), <90% relative humidity, non-condensing

Before connecting the mains power cable, ensure that the correct mains voltage is selected on the electronics panel (230, 120, or 100 V) and that the mains power switch is off. Next connect the input signal cable (analog, digital, or both as appropriate) and power up the loudspeaker. There will be a five second delay before sound can be heard from loudspeaker so as to avoid noises (pops) from preceding equipment turned on at the same time. Conversely, turning off the loudspeaker immediately mutes the audio. The K+H logo should light up together with either the green or yellow light to indicate an analog or digital signal. If there are no lights, check the mains power supply and the display dimmer (ensure it is not set to 0 %).

In a studio application, the loudspeakers should be placed according to the ITU-R BS.775-1 recommendations so there is consistency of reproduction when compared to other listening environments. For movie applications, ANSI/SMPTE 202M is the preferred standard for system setup. For home use, as materials are mixed in ITU style rooms, one should get as close as possible to this configuration to maximize replay authenticity.

Loudspeaker Name

Loudspeaker Name Loudspeaker Name

Loudspeaker Name ITU

ITUITU

ITU----R BS.775

R BS.775R BS.775

R BS.775----1 Angle

1 Angle1 Angle

1 Angle ANSI/SMPTE 202M

ANSI/SMPTE 202MANSI/SMPTE 202M

ANSI/SMPTE 202M

Angle

AngleAngle

Angle Left -30° -22.5° Center 0° 0° Right 30° 22.5° Left Surround -110°±10° An array to the left Right Surround 110°±10° An array to the right

For two-channel stereo, ±30° should be used. There are currently no internationally agreed standards for 6.1 or

7.1 formats. However common practice is to use one or two loudspeakers in the centre back location of a 6.1 system. In a 7.1 system common practice is to place side loudspeakers at ±90° and to push the surround loudspeakers back to ±150°.

For the best stereo imaging the loudspeakers should be placed symmetrical in a symmetrical room where objects have been placed symmetrically. This ensures the same response from each loudspeaker at the listening position and thus good imaging. Sound reflected back to the listening position should also be minimized using surface angling or acoustical treatment. The acoustical axis point towards the listening position or centre of the listening area in both the horizontal and vertical planes.

The loudspeaker should be placed on a circle to ensure equal time of arrival of the audio from all loudspeakers. Failing this, appropriate electronic time delays should be added to compensate for time of flight differences.

If the loudspeaker is used free standing, good quality loudspeaker stands and suitable accessories (see Accessories and Options section) are recommended.

The benefits of flush mounting are reduced cabinet edge diffraction (smoother midrange), increased bass driver loading (reduced bass distortion), and elimination of rear wall cancellations (smoother bass response). It is a good idea to employ an experienced acoustic engineer to design an effective flush mounting wall. Recommended acoustical control settings are shown in the Acoustical Controls section and a Remote Electronics Kit, shown in the Accessories and Options section, is highly recommended to avoid heat dissipation problems and allow easy adjustment of the controls. If the loudspeaker must be covered, use a thin open weave cloth. Two layers of very thin material will improve opacity.

Before trimming the levels, calibrate each loudspeaker’s response:

• In studio applications, the response of each loudspeaker at the listening position should be flat.

• In movie applications, the response of each loudspeaker should be one of the X-curve shapes, depending on

the size of the room (see ANSI/SMPTE 202M).

• In home applications, the response of each loudspeaker should be set for subjective audio quality. This is not

necessarily a flat response, but generally, with time, a gently downward sloping response with increasing frequency is often preferred.

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Absolute acoustic level calibration is achieved using a sound level meter set to ‘C’-weighting and a “slow” integration time. Play a broadband pink noise test signal set to -18 dBFS (Europe) or -20 dBFS (USA) on the console meters and measure the sound pressure level at the listening position. Then adjust each channel’s level (can also be adjusted on all loudspeakers for a specific channel) until the desired level is achieved:

Application

Application Application

Application SPL

SPLSPL

SPL Movie 85 dB(C) Broadcast 79 dB(C) Music Engineer’s preference

For information on setting up a subwoofer with these main loudspeakers, please refer to the operating manual supplied with the subwoofer.

Technical Specifications

Technical SpecificationsTechnical Specifications

Technical Specifications

Acoustics

AcousticsAcoustics

Acoustics

-3 dB free field frequency response 30 Hz … 24 kHz, ± 3 dB Pass band free field frequency response 32 Hz … 20 kHz, ± 2 dB Self-generated noise

≤25 dB(A) at 10 cm Sine wave output with a THD < 0.5 % at 1 m distance 95 dB SPL (>100 Hz) Max. SPL In half space at 3% THD 120.0 dB SPL Averaged between 100 Hz and 6 kHz

Electronics

ElectronicsElectronics

Electronics Woofer amplifier, cont.(peak) output power* 340 W (400 W) Mid amplifier, cont. (peak) output power* 160 W (190 W) Tweeter amplifier, cont.(peak) output power* 180 W (210 W) Controller design analog, active Crossover Frequency 600 Hz/2.2 kHz Crossover Slope (dB/oct.) 24 Equalization: Low cut – Bass 0, -2.5, -5, -7.5 dB Mid 0, -1.5, -3, -4.5 dB High +1, 0, -1, -2 dB Parametric Equalizer: Bypassable Gain +4 … -12 dB Frequency 20 … 200 Hz Q 1 … 8 Time of Flight adjustment delay – Protection circuitry Limiter: low, mid, high Infrasonic filter frequency; slope 15 Hz; 12 dB/oct.

Analog In

Analog InAnalog In

Analog Input

putput

put

Impedance, electrically balanced

XLR, 13 kΩ

Impedance, transformer balanced

XLR, 4.7 kΩ, optional Input sensitivity -8 dBu / +6 dBu Attenuator -9 … + 6 dB CMRR >60 dB @ 15 kHz

Digital Input/Output

Digital Input/OutputDigital Input/Output

Digital Input/Output Optional Format XLR (Format BNC) AES/EBU (AES3id, S/P-DIF) Impedance XLR, balanced

110 Ω

Impedance BNC, unbalanced

75 Ω (input and output) Input switching Analog/Digital A, B, Mono Digital converter: resolution, design

16 … 24-bit DAC, ∆Σ

sampling rate 20 … 216 kHz (SRC)

Displays and Mains Power

Displays and Mains PowerDisplays and Mains Power

Displays and Mains Power Displays and indicators: power on K + H logo “red” limit/clip Red LED display Green (Analog signal),

Yellow (Digital signal, error) Mains power 230, 120, 100 V AC Power consumption - Idle 36 VA Power consumption - Full output AC 1300 VA

Mechanics

MechanicsMechanics

Mechanics Height x width x depth, mm 645 x 330 x 444 mm inches 25 3/8” x 13” x 17 1/2” Internal net volume 42 liters Weight 36.0 kg (79.2 lb)

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Drivers Magnetically shielded Woofer 10", 250 mm Midrange 3", 76 mm Tweeter 1", 25 mm Mounting points Threaded inserts on rear Mounting hardware included – Cabinet surface finish Painted Color: standard Anthracite or silver Color: custom at extra cost – Baffle cover Optional metal grille *THD+N < 0.1 % with limiter deactivated

Acoustical Measurements

Acoustical MeasurementsAcoustical Measurements

Acoustical Measurements

Below are acoustical measurements conducted in anechoic conditions at 1 m. Color versions of these graphs can be found on the appropriate product page of the klein-hummel.com web site.

O 410 free

O 410 freeO 410 free

O 410 free----field response

field responsefield response

field response O 410 group delay

O 410 group delayO 410 group delay

O 410 group delay

125 250 500 1000 2000 4000 8000 16000

-90ø

-60ø

-30ø

0ø

30ø

60ø

90ø

Grad

3-6 0-3

-3-0

-6--3

-9--6

-12--9

-15--12

-18--15

-21--18

125 250 500 1000 2000 4000 8000 16000

-90ø

-60ø

-30ø

0ø

30ø

60ø

90ø

Grad

3-6 0-3

-3-0

-6--3

-9--6

-12--9

-15--12

-18--15

-21--18

O 410 horizontal directivity plot

O 410 horizontal directivity plotO 410 horizontal directivity plot

O 410 horizontal directivity plot O 410 vertical

O 410 verticalO 410 vertical

O 410 vertical directivity plot

directivity plot directivity plot

directivity plot

O 410 harmonic distortion at 95 dB SPL

O 410 harmonic distortion at 95 dB SPLO 410 harmonic distortion at 95 dB SPL

O 410 harmonic distortion at 95 dB SPL O 410 intermodulation distortion at 95 dB SPL

O 410 intermodulation distortion at 95 dB SPLO 410 intermodulation distortion at 95 dB SPL

O 410 intermodulation distortion at 95 dB SPL

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O 410 m

O 410 mO 410 m

O 410 max

axax

aximum

imumimum

imum SPL at 3 % and 10 % THD

SPL at 3 % and 10 % THD SPL at 3 % and 10 % THD

SPL at 3 % and 10 % THD

Accessories and Options

Accessories and OptionsAccessories and Options

Accessories and Options

In this section is a description of the options and accessories that are available for the products covered in the operating manual. Note that options and accessories are fitted at the user’s own risk and that safety and warning instructions should be observed.

Transformer balanced input module option (TIM 1)

Transformer balanced input module option (TIM 1)Transformer balanced input module option (TIM 1)

Transformer balanced input module option (TIM 1)

This option changes the electronic balanced input into a transformer balanced input for increased noise immunity, especially when used in conjunction with the ground lift switch. The circuitry is based on a current transformation with a THD less then -100 dB @ 16 dBu input level, even down to 20 Hz. It can be used in conjunction with the digital input option when “Analog” is selected.

Digital input module option (DIM 1)

Digital input module option (DIM 1)Digital input module option (DIM 1)

Digital input module option (DIM 1)

This option is a 16…24-bit, 20…216 kHz digital input stage that can accept AES3-2003 (commonly known as AES/EBU), AES3id-2001, and S/P-DIF (with a suitable impedance adapter or connector converter) signals. XLR and BNC connectors ensure good interconnectivity options. A buffered BNC output is provided for connecting additional loudspeakers to the same cable – a user supplied 75 Ω BNC terminated coaxial cable is required for this (same cable type as used for word clock signals). The BNC output provides an electronically buffered copy of the input data, but in AES3id format. The BNC input stage has an internal 75 Ω termination so T-pieces and terminators are not required. A four-way switch allows selection of:

• “Analog

AnalogAnalog

Analog” input (electronic, or transformer if it is fitted)

• Digital subframe “A

A”

• Digital subframe “B

B”

• Digital subframes A and B simultaneously “M

M” (mono). Note: output level is automatically attenuated by 6

dB to avoid clipping and have the same loudness as a single channel reproduction (A or B).

It is possible to have an analog and a digital cable simultaneously connected to the loudspeaker. The input selector switch is used to monitor the selected input. Only one of the digital inputs (XLR or BNC) should be connected at a time. A clock input is not required because loudspeakers are not audio sources and the clock signal is locally regenerated from data contained in the bit stream.

User-bit volume control (IEC 60958-1) is supported so that the source can directly control the output level of the loudspeaker whilst using digital signals normalized to full scale. The digital volume control occurs in the analog domain, thereby offering full bit resolution and improved reproduction at low replay levels. The source must also support this standard for it to work – see information provided by the manufacturer of the source to see how it has been implemented.

De-emphasis is supported on 32, 44.1, and 48 kHz sample rates.

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An interconnection example is shown below. To listen to the analog source, set both loudspeakers to “Analog”. To listen to the digital source, set the left loudspeaker to “A” and the right loudspeaker to “B” (note the signal routing in the source).

If the analog input is selected (Analog), the green light on the MMD™ display illuminates. If the digital input is selected (A, B, or M), the yellow light on the MMD™ display illuminates. The yellow light does not illuminate if there is no valid word clock on either digital input (note: the green light will also be off in this state as a digital input has been selected). If there is an error in the digital signal, the yellow light will flash. If this happens check the cables and connectors, and the source equipment. If there are no lights on, check that mains power is applied and that the display dimmer switch is not set to 0%. Always use good quality cables with the correct impedance to achieve these maximum cable lengths:

Format (Connector)

Format (Connector)Format (Connector)

Format (Connector) Impedance

ImpedanceImpedance

Impedance Cable Length

Cable LengthCable Length

Cable Length

S/P-DIF (RCA)

75 Ω

up to 10 m (30’)

AES3 (XLR)

110 Ω

up to 100 m (300’)

AES3id (BNC)

75 Ω

up to 1000 m (3000’)

Warning:

Warning:Warning:

Warning: The digital input option’s BNC connectors protrude from the rear panel. If the O 410 cabinet is placed on a flat hard surface with the drivers facing upwards, the circuit board will be damaged. Find a soft surface, such as bubble wrap, packing foam, or a folded blanket, or angle the cabinet slightly to avoid applying pressure to the BNC connectors.

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Remote electronics kit option (REK 1)

Remote electronics kit option (REK 1)Remote electronics kit option (REK 1)

Remote electronics kit option (REK 1)

This is a hardware kit to allow the electronics panel to be located up to 30 m (90’) away from the loudspeaker cabinet. The benefits enjoyed when loudspeakers are flush mounted are: lack of heat dissipation problems, easy adjustment of the controls, and easier electronics servicing. An 8-pole Speakon terminated cable carries the driver signals and a CAT-5 cable carries the display signals. Additional space is not required behind the cabinet as the connectors face downwards when installed. The connections are as follows (note: “Bass 2” is not used when there is only one bass driver in the cabinet):

Drivers

DriversDrivers

Drivers Speakon Pins

Speakon PinsSpeakon Pins

Speakon Pins Display

DisplayDisplay

Display RJ

RJRJ

RJ----45 Pins

45 Pins45 Pins

45 Pins Bass 1-/+ 1 -/+ K+H Logo -/+ 1 & 2 Bass 2-/+ 2 -/+ Red -/+ 3 & 4 Midrange -/+ 3 -/+ Yellow -/+ 5 & 6 Treble -/+ 4 -/+

Green -/+ 7 & 8

The cabinet’s serial number is printed under the bass ring – pull it gently by hand to remove it – so it is visible when the cabinet is flush mounted. This number should be matched to the serial number printed on the remote located electronics panel.

Cable pack (CP nn)

Cable pack (CP nn)Cable pack (CP nn)

Cable pack (CP nn)

A CAT-5 and 8-core driver cable of length 2, 5, 10, 15, 20, 25, and 30 m (6’, 15’, 30’, 45’, 60’, 75’, and 90’) are available from Klein + Hummel (Cable Pack 2, 5, 10, 15, 20, 25, or 30), or industry standard cables may be sourced from a third party. The Klein + Hummel cables use flame retardant materials and high-quality metal connectors (Neutrik EtherCon NE8MC and Neutrik Speakon NLT8FX). The conductor specification is shown in the table below:

Length

LengthLength

Length Wire Gauge

Wire GaugeWire Gauge

Wire Gauge

<=20 m (60’) 2.5 mm2 (14 AWG)

>20 m (60’) 4 mm2 (12 AWG)

Mounting hardware (LH nn)

Mounting hardware (LH nn)Mounting hardware (LH nn)

Mounting hardware (LH nn)

A collection of hardware for mounting the loudspeaker:

LH 28 Tripod stand adapter

Tripod stand adapterTripod stand adapter

Tripod stand adapter – used to fit the loudspeaker onto a standard 1.4” tube tripod stand (external fit with screw thread).

LH 29 TV spigot adapter

TV spigot adapterTV spigot adapter

TV spigot adapter – used to fit the loudspeaker onto a standard TV spigot used in broadcast studios (internal fit).

LH 36 Tilting adapter

Tilting adapterTilting adapter

Tilting adapter – used to add a tilting function to a tripod stand or TV spigot.

LH 37 Tripod stand adapter

Tripod stand adapterTripod stand adapter

Tripod stand adapter – used to fit the loudspeaker into a standard 35 mm (1.4”) flange fitting.

LH 41 Base plate

Base plate Base plate

Base plate – used to fit the loudspeaker onto a tripod stand. Adding an LH 36 gives a tilting function.

LH 42 Ceiling s

Ceiling sCeiling s

Ceiling system (Vertical)

ystem (Vertical) ystem (Vertical)

ystem (Vertical) – used to suspend the loudspeaker from a ceiling horizontally or vertically. The

maximum angle is 30°, selectable in 2.5° increments.

LH 43 Surface mounting plate

Surface mounting plate Surface mounting plate

Surface mounting plate – used to mount the LH 42 onto a flat surface such as a ceiling.

LH 45 Wall

Wall Wall

Wall mount ‘L’ bracket

mount ‘L’ bracket mount ‘L’ bracket

mount ‘L’ bracket – used to suspend the loudspeaker from a ceiling when the cabinet is oriented

horizontally. The maximum angle is 30°, selectable in 2.5° increments.

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LH 28

LH 28 LH 28

LH 28 –––– Tripod stand adapter

Tripod stand adapter Tripod stand adapter

Tripod stand adapter LH 29

LH 29 LH 29

LH 29 –––– TV spigot adapter

TV spigot adapter TV spigot adapter

TV spigot adapter LH 36

LH 36 LH 36

LH 36 –––– Tilting adapter

Tilting adapter Tilting adapter

Tilting adapter

LH 37

LH 37 LH 37

LH 37 –––– Tripod flange adapter

Tripod flange adapter Tripod flange adapter

Tripod flange adapter LH 41

LH 41 LH 41

LH 41 –––– Base plate

Base plate Base plate

Base plate LH 42

LH 42 LH 42

LH 42 –––– Ceiling system

Ceiling system Ceiling system

Ceiling system

LH 43

LH 43 LH 43

LH 43 –––– Surface mounting plate

Surface mounting plate Surface mounting plate

Surface mounting plate LH 45

LH 45 LH 45

LH 45 –––– Wall mount ‘L’ bracket

Wall mount ‘L’ bracket Wall mount ‘L’ bracket

Wall mount ‘L’ bracket

Suitable combinations of the above hardware are:

Location of Loudspeaker

Location of LoudspeakerLocation of Loudspeaker

Location of Loudspeaker Hardware Combinations

Hardware CombinationsHardware Combinations

Hardware Combinations

Flush M

Flush MFlush M

Flush Mounted

ountedounted

ounted REK 1 and CP nn for electronics

On a Floor Stand

On a Floor StandOn a Floor Stand

On a Floor Stand (tripod, TV spigot, or with a 5/8" thread)

LH 41 + LH 28 LH 41 + LH 36 + LH 28 LH 41 + LH 29 LH 41 + LH 36 + LH 29

On a Subwoofer

On a SubwooferOn a Subwoofer

On a Subwoofer (fitted with a flange)

LH 41 + LH 37 LH 41 + LH 36 + LH 37

On a W

On a WOn a W

On a Wal

alal

alllll LH 42 + LH 45

Off a Ceiling

Off a CeilingOff a Ceiling

Off a Ceiling LH 42

LH 42 + LH 43

Off a Lighting or Truss Bar

Off a Lighting or Truss BarOff a Lighting or Truss Bar

Off a Lighting or Truss Bar LH 42 + LH 29

Detailed mechanical drawings of these accessories can be found on line at www.klein-hummel.com.

Metal grille (GO 410)

Metal grille (GO 410)Metal grille (GO 410)

Metal grille (GO 410)

A metal grille (pictured below) can be attached to the front of the loudspeaker to protect the drivers. It simply clips into the grooves on the long sides of the cabinet. It is damped to avoid rattles and has been designed for acoustic transparency. The grille is available in black and silver.

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Flight case (FO 410)

Flight case (FO 410)Flight case (FO 410)

Flight case (FO 410)

As the original packing is primarily designed to get the loudspeaker from the factory to the end user, it is highly recommended that a flight case (pictured above) is used if the loudspeaker is regularly moved between locations. One O 410 can be packed in each flight case.

Safety and Warnings

Safety and WarningsSafety and Warnings

Safety and Warnings

In addition to specific warnings throughout this document, please observe these additional general instructions. The term “loudspeaker” includes the case when the electronics of an active loudspeaker is installed into a Remote Electronics Kit, or when it is still located in the back of the cabinet.

This symbol means that a high voltage is to found nearby. Take appropriate precautions to avoid electric shocks.

This symbol means that hot parts of the product may be found nearby. Take appropriate precautions to avoid burns.

General

GeneralGeneral

General

• Keep these instructions in a safe place for future reference.

• Failure to follow the safety and warning instructions contained in this document voids the warranty.

• This product should be used for the intention for which it was designed and as described in this document.

Environment

EnvironmentEnvironment

Environment

• Ensure that the room in which you use this product is wired in accordance with the local electrical code and

checked by a qualified inspector.

• A correctly earthed mains power connection should always be used.

• If access to the interior electronics is required, disconnect it from the mains power and allow electrical energy

storage devices, such as capacitors and transformers, to discharge.

• Other electronic products may generate sufficient heat to require ventilation.

• Do not block or cover heatsinks, fans, or vents.

• Unless otherwise stated, this product is designed to be used indoors only.

• Do not expose this product to water, any other liquids, moisture, or naked flames.

• Do not install this product into hot, humid, or excessively dusty locations, or into direct sunlight.

• Avoid installing this product into locations where it will experience externally generated vibrations or heat

(e.g. radiators).

• If the product is moved from a cold environment into a warm one (such as from a vehicle into a building), it is

possible that condensation will form. Please allow the product sufficient time for acclimatization to room temperature before using.

• Wherever an amplifier is located, a free flow of air should be maintained by leaving a gap of at least 5 cm

(2”) around it. A flush mounted cabinet with the electronics panel still installed should be well-ventilated to avoid heat build-up and possible risk of fire.

Use

UseUse

Use

• The equipment should be mounted by a suitably qualified professional in accordance with local, national, and

international regulations and standards.

• Falling equipment can damage itself, people, and other objects, so do not place this unit on any unstable

platform, cart, trolley, stand, table, or mounting hardware.

• Do not use accessories and options with this product that are not approved by Klein + Hummel.

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• Mounting hardware must be attached to the appropriate hardware and attachment points rated and

intended for such use.

• Ensure that the operating voltage of this product matches that of the local mains voltage.

• Use the power cable that came with this product as this has been manufactured to international safety

standards. If it has been damaged obtain a similarly certified and specified mains power cable.

• This product should be unplugged from the mains power and the signal sources if is not to be used for an

extended period of time, or during lightening storms.

• The power switch on this product should be set to off before applying mains power via the mains power

cable.

• Some parts of this product, particularly power amplifier components, can become hot to the touch. Do not

touch these parts until they have cooled down.

• Never touch the loudspeaker’s drivers.

• Loudspeakers are often capable of producing a sound pressure level in excess of 85 dB. This may cause

permanent hearing damage so user caution is recommended. Noise exposure is a function of SPL and time, so observe local regulations when listening at high levels for a long time. Hearing protection may be required.

Servicing

ServicingServicing

Servicing

• Repairs, maintenance, or other servicing of this product when its interior compartment is exposed should

only be performed by Klein + Hummel authorized service engineers familiar with the equipment and risks involved in handling electronics.

• Servicing may be required in the event of exposure to unfavorable environmental conditions, such as liquids,

excessive heat, or a lightning strike.

• Amplifier outputs may carry high voltages so take appropriate precautions, for example, connect the cables

before powering up.

• When replacing a fuse, ensure that a brand new fuse is used. It must be exactly the same type, value, and

voltage as the original, as stated in the product’s technical specifications or on the circuit board.

Maintenance and Servicing

Maintenance and ServicingMaintenance and Servicing

Maintenance and Servicing

• There are no user serviceable parts inside the standard version of this product. Repairs should only be

undertaken by Klein + Hummel certified service engineer.

• Options and accessories are fitted at the user’s own risk.

• Products may be cleaned using a non-abrasive cloth lightly damped with water. Disconnect the mains power

cable when cleaning to avoid risk of electric shock. Do not use alcohol-based cleaners.

• The electronics should only be opened by non-“Klein + Hummel certified service engineer” for the installation

of user installable options as described in the product’s operating manual. The mains power cable should be disconnected whenever the electronics panel is opened.

• If the main fuse blows, the product should be checked by a Klein + Hummel certified service engineer.

Guarantee

GuaranteeGuarantee

Guarantee

This product comes with a guarantee, a copy of which is enclosed with this product.

Recycling

RecyclingRecycling

Recycling

Attention to product quality in the design phase ensures, firstly, that products have a long life and that, secondly, all parts of a product may be reused or recycled at the end of that life. An extensive product servicing network ensures that products can be repaired in the event of the premature failure of a part, or as a way to prolong the life of a product that would otherwise be considered a candidate for landfill. Eventually there comes a time when a product is considered beyond repair (for economic reasons or lack of parts), so the parts must be disposed of in a suitable manner. The disposal should conform to local environmental regulations and be conducted in an authorized recycling facility.

Loudspeakers and electronic products consist of some or all of these components:

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Item

ItemItem

Item Material

MaterialMaterial

Material Recycling

RecyclingRecycling

Recycling Instructions

Instructions Instructions

Instructions

Loudspeaker Cabinets Wood (MDF), steel, aluminum,

polyurethane or a combination

Separate materials then recycle

Drivers Aluminum, copper, paper and plastics Separate materials then recycle Damping Materials Sheep wool Compost Electronics Panel Aluminum Remove electronics and recycle Electronics Various Recycle in an approved recycling facility Remote Electronics Kits Steel and some electronics Separate materials then recycle Cables and Connectors Metals and/or plastic Reuse or recycle Packing Material Cardboard, wood and/or plastics Separate materials then recycle User Manuals and Sales Literature

Paper and cardboard Recycle

EC Declaration of Conformity

EC Declaration of ConformityEC Declaration of Conformity

EC Declaration of Conformity

This equipment is in compliance with the essential requirements and other relevant provisions of Directives 89/336/EC and 73/23/EC. The declaration is available on the internet site at www.klein-hummel.com. Before putting the device into operation, please observe any respective country-specific regulations.

For loudspeakers fitted

For loudspeakers fitted For loudspeakers fitted

For loudspeakers fitted with digital inputs: Compliance to FCC Rules

with digital inputs: Compliance to FCC Ruleswith digital inputs: Compliance to FCC Rules

with digital inputs: Compliance to FCC Rules

This device complies with part 15 of the FCC Rules and with RSS-210 of Industry Canada. Operation is subject to the following two conditions:

• This device may not cause harmful interference, and

• This device must accept any interference received, including interference that may cause undesired operation.

This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

• Reorient or relocate the receiving antenna.

• Increase the separation between the equipment and receiver.

• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.

• Consult the dealer or an experienced radio/TV technician for help.

This class B digital apparatus complies with the Canadian ICES-003

Changes or modifications to this equipment not expressly approved by Klein + Hummel may void the FCC authorization to operate this equipment.

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Introduction

IntroductionIntroduction

Introduction

Merci d’avoir acheté une enceinte Klein + Hummel. Son guide d’ondes de type Mathematically Modeled Dispersion™ (MMD™), ses réglages acoustiques d’une grande souplesse, ses différentes options d’entrée et la gamme étendue d’accessoires de montage et de fixation permettent de l’utiliser dans des conditions très diverses, sur n’importe quel type de source sonore, dans des emplacements très différents. Elle utilise les technologies et composants acoustiques et électriques de dernière génération, afin d’assurer la reproduction sonore la plus précise possible. Les produits Klein + Hummel sont conçus pour durer – nous vous souhaitons donc de nombreuses années d’utilisation de ce produit.

Selon leurs dimensions, les enceintes 3 voies Klein + Hummel vont du moniteur de proximité aux grosses écoutes. Elles s’utilisent en musique, en broadcast ou en postproduction pour l’enregistrement, le mixage ou le mastering. Vous pouvez les placer dans le local d’écoute lui-même, ou les encastrer dans un mur, et les mélanger à votre guise au sein d’un système d’écoute multicanal.

Avant de lire le reste de ce manuel utilisateur, observez les instructions de sécurité et les avertissements qui se trouvent dans les dernières pages.

Contenu du carton

Contenu du cartonContenu du carton

Contenu du carton

Le carton d’emballage contient :

• Ce manuel d’utilisation

• La garantie produit

• L’enceinte elle-même

• Trois câbles secteur (Euro, UK et USA)

• Un tournevis pour régler les trim et basculer les sélecteurs

Les câbles audio ne sont pas livrés. La liste des options et accessoires se trouve à la fin de ce manuel utilisateur.

Applications habituelles et distances d’écoute

Applications habituelles et distances d’écouteApplications habituelles et distances d’écoute

Applications habituelles et distances d’écoute

Dans le cadre de l’application habituelle de l’enceinte (écoute “mid-field”, écoute moyenne), voici les distances d’écoute minimale, recommandée et maximale :

Distances

DistancesDistances

Distances

Produit

ProduitProduit

Produit Application habituelle

Application habituelleApplication habituelle

Application habituelle Minimale

MinimaleMinimale

Minimale Recommandée

RecommandéeRecommandée

Recommandée

Maximale

MaximaleMaximale

Maximale

O 410 Écoute moyenne “Mid-field” 1,5 m 2,5 m 8 m

Dans le cadre de systèmes d’écoute multicanal, l’idéal serait d’utiliser des enceintes identiques sur tous les canaux. Toutefois, comme le plus souvent, les canaux arrière contiennent moins de graves et leur niveau est inférieur à celui des enceintes avant, les enceintes arrière peuvent être d’un modèle inférieur – voir le tableau cidessous pour plus de détails. L’enceinte centrale doit toujours être identique aux enceintes gauche et droite. Le caisson de graves doit être de performances suffisantes par rapport au niveau des enceintes – pour plus de détails, reportez-vous au manuel utilisateur du caisson de graves.

Avant

AvantAvant

Avant Arrière (idéal)

Arrière (idéal)Arrière (idéal)

Arrière (idéal) Arrière (petites)

Arrière (petites)Arrière (petites)

Arrière (petites) Caisson(s) de graves

Caisson(s) de gravesCaisson(s) de graves

Caisson(s) de graves

O 410 O 410 O 300, O 300 D Voir le manuel utilisateur du caisson

Synoptique

SynoptiqueSynoptique

Synoptique

Voici un synoptique de l’enceinte trois voies :

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Pour plus d’informations à propos des fréquences du filtre, de la puissance des amplificateurs et du type des transducteurs, veuillez vous référer à la section des caractéristiques détaillées du produit. Dans une O 410, le potentiomètre Low Mid / Mid est un potentiomètre Mid. Comme l’option entrées numériques est installée par l’utilisateur, il n’existe pas de version “D” de la O 410.

Photo du panneau arrière

Photo du panneau arrièrePhoto du panneau arrière

Photo du panneau arrière

Panneau arrière de l’O 410

Panneau arrière de l’O 410Panneau arrière de l’O 410

Panneau arrière de l’O 410

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Étage d’entrée

Étage d’entréeÉtage d’entrée

Étage d’entrée

L’étage d’entrée

étage d’entréeétage d’entrée

étage d’entrée standard

standard standard

standard utilise un connecteur femelle XLR (impédance d’entrée : 14 kohms) – la symétrie est

électronique.

Point

PointPoint

Point Signal

SignalSignal

Signal 1 Masse Audio 2 Point chaud (+) 3 Point froid (-)

Si vous entendez un bourdonnement ou un grésillement en provenance de l’enceinte, vérifiez si elle n’en est pas elle-même la source, en débranchant le câble d’entrée audio. Si le bruit disparaît, l’enceinte n’est pas en cause – le parasite provient du câblage lui-même ou de la source de signal. Il existe plusieurs méthodes pour augmenter l’immunité de l’enceinte aux bruits de fond externes :

• Utilise le sélecteur de levage de masse

le sélecteur de levage de massele sélecteur de levage de masse

le sélecteur de levage de masse pour déconnecter la masse audio, point 1 du connecteur XLR d’entrée analogique, du châssis de l’électronique. Pour des raisons de sécurité, le châssis de l’électronique est toujours relié à la terre (via le cordon secteur).

• Intégrez à l’enceinte un étage d’entrée à symétrie par transformateur (optionnel)

étage d’entrée à symétrie par transformateur (optionnel)étage d’entrée à symétrie par transformateur (optionnel)

étage d’entrée à symétrie par transformateur (optionnel). Cette solution est

particulièrement efficace lorsqu’elle est combinée au levage de masse.

• Si vous utilisez des câbles asymétriques, câblez-les de façon spécifique – voir schéma ci-dessous.

Déconnectez le blindage du corps du connecteur RCA si le bourdonnement ou le grésillement persiste, et/ou levez la masse en entrée de l’enceinte.

Vous pouvez également intégrer un étage d’entrée numérique 24

étage d’entrée numérique 24étage d’entrée numérique 24

étage d’entrée numérique 24 bits, 192

bits, 192bits, 192

bits, 192 kHz

kHzkHz

kHz. Il est pourvu d’entrées sur XLR et BNC, et offre une sortie BNC. Il est possible de connecter simultanément des signaux d’entrée analogiques et numériques – le sélecteur permet de choisir l’entrée désirée.

Réglages acoustiques

Réglages acoustiquesRéglages acoustiques

Réglages acoustiques

Les réglages acoustiques sont des filtres analogiques d’ordre assez bas, conçus pour compenser certains des problèmes acoustiques fréquemment rencontrés dans des environnements d’écoute courants. Selon le modèle d’enceinte, vous trouverez un potentiomètre Low Mid ou Mid. Les autres potentiomètres sont communs à toutes les enceintes 3 voies.

Les enceintes Klein + Hummel sont conçues pour présenter une courbe de réponse plane en chambre sourde lorsque tous les potentiomètres acoustiques se trouvent en position 0 dB. Dès qu’une enceinte se trouve dans un environnement d’écoute “réel”, sa courbe de réponse change : il faut donc la corriger afin de rétablir une courbe de réponse plane, par l’intermédiaire des potentiomètres de réglage acoustique. Les valeurs de réglage varieront selon l’emplacement de l’enceinte, et différeront d’un emplacement à un autre, dans un même local, pour une même enceinte. Si le local présente une bonne symétrie, les paires d’enceintes gauche/droite (avant ou arrière) demanderont probablement les mêmes valeurs de réglage acoustique. Vous trouverez quelques valeurs suggérées après la description des différents potentiomètres :

Le potentiomètre bass

bassbass

bass sert à compenser l’accentuation dans le grave occasionnée naturellement par la présence, à proximité de l’enceinte, de grandes surfaces dures (mur, plafond, sol…). Quatre valeurs d’atténuation sont disponibles : 0 / -2,5 / -5 et -7,5 dB.

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Le potentiomètre mid

midmid

mid (O 410) sert à compenser les réflexions de premier ordre marquées (sur le sol, le plafond, les murs latéraux) qui peuvent provoquer une certaine agressivité dans le médium. Cet effet peut aussi être provoqué par un temps de réverbération trop élevé dans le registre médium – qu’il faut donc compenser. Quatre valeurs sont disponibles : 0 / -1,5 / -3 et -4,5 dB.

Le potentiomètre treble

trebletreble

treble agit sur le niveau de sortie du tweeter, et peut servir à compenser un amortissement des aigus trop marqué (ou pas assez) dans le local d’écoute. Il est souvent réglé en fonction des goûts personnels de l’ingénieur du son, alors que dans un environnement acoustique bien contrôlé, il n’y a aucune raison de le régler sur autre chose que 0 dB. Quatre valeurs sont disponibles : +1 / 0 / -1 et -2 dB. L’égaliseur parametric

parametricparametric

parametric est un simple étage de correction paramétrique (PEQ), permettant d’intervenir sur le gain (de +4 à -12 dB), la fréquence d’intervention (de 20 à 200 Hz) et le Q (de 1 à 8), de façon à compenser des nonlinéarités se manifestant en dessous de 200 Hz. Ces non-linéarités peuvent provenir d’accentuations naturelles provoquées par des interférences constructives, ou par des modes propres acoustiques marqués. Le sélecteur Bypass permet de désactiver cet égaliseur paramétrique.

Pour régler ces potentiomètres de la façon la plus appropriée en fonction de l’emplacement des enceintes, il est conseille d’utiliser un système de mesure acoustique – notamment pour ajuster l’égaliseur paramétrique. En l’absence de dispositif de mesure, nous vous recommandons de partir des valeurs suivantes :

Réglage acoustique

Réglage acoustiqueRéglage acoustique

Réglage acoustique

Emplacement enceinte

Emplacement enceinteEmplacement enceinte

Emplacement enceinte

Bass

BassBass

Bass Mid

MidMid

Mid

O 410

Treble

TrebleTreble

Treble Parametric

ParametricParametric

Parametric

Dans un coin -7,5 dB - - ***

******

*** Près d’ (ou encastré dans) un mur dur -5 dB - - Près d’ (ou encastré dans) un mur ‘souple’ -2,5 dB - - Salle non traitée, champ libre -2,5 dB -1,5 dB -1 dB ***

******

*** Salle bien traitée, champ libre - - - -

***

******

*** Indique qu’il faudra probablement utiliser l’égaliseur paramétrique. Son paramétrage dépend de la situation, aucune recommandation standard n’est possible.

O 410 : Ac

O 410 : AcO 410 : Ac

O 410 : Action des potentiomètres

tion des potentiomètrestion des potentiomètres

tion des potentiomètres O 410 : Action de l’égaliseur paramétrique

O 410 : Action de l’égaliseur paramétriqueO 410 : Action de l’égaliseur paramétrique

O 410 : Action de l’égaliseur paramétrique

Bass, Midrange et Treble

Bass, Midrange et TrebleBass, Midrange et Treble

Bass, Midrange et Treble

Les réglages de niveau d’entrée

d’entrée d’entrée

d’entrée et de sortie

sortie sortie

sortie s’effectuent via un potentiomètre gradué avec précision, repéré

“Input Gain

Input GainInput Gain

Input Gain”, et d’un potentiomètre “Output Level

Output LevelOutput Level

Output Level” d’action plus grossière. Ils permettent d’adapter l’enceinte aux niveaux de fonctionnement d’appareils très divers, tout en maintenant le niveau de pression acoustique désiré. Comme pour tout maillon d’une chaîne audio, il est préférable d’utiliser le gain le plus bas possible pour l’application, pour éviter d’amplifier le bruit de fond provenant des appareils sources situés en amont. Pour vérifier cet aspect, il suffit de débrancher le câble audio arrivant à l’enceinte : si le niveau de bruit de fond descend de façon notable, c’est que le souffle provient de la source, et non de l’enceinte elle-même. Les valeurs par défaut sont “0 dB” et “100 dB SPL à 1 m”. Autrement dit, vous obtenez un niveau de pression sonore de 100 dB SPL à 1 mètre pour un signal d’entrée d’un niveau électrique de 0 dBu (soit 0,775 Volt). La sensibilité maximale (niveau de pression sonore le plus élevé pour une tension d’entrée donnée) est obtenue en position “6 dB” et “114 dB SPL à 1 m”, et la sensibilité la plus basse, pour “-9 dB” et “100 dB SPL à 1 m”.

+ 58 hidden pages

Klein + Hummel O 410 Operating Manual

Specifications and Main Features

Frequently Asked Questions

User Manual