Klein + Hummel O 200 Installation And Operation Manual

Active

Studio Monitor

Installation

and

Operation

O 200

KLEIN + HUMMEL GmbH

Zeppelinstr. 12 73760 Ostfildern/Germany

Tel.: + 49 - (0)711 - 45893 - 0
Fax: + 49 - (0)711 - 45893 - 35
e-Mail:[e-mail]
Internet:www.klein-hummel.de

058-E0011

Version 01/2003

Page 2 Active Studio Monitor O 200

Safety Instructions

It is absolutely essential that you read these safety instructions carefully before connecting and using this K+H
product. Your safety depends on it. Furthermore, failure to follow these instructions voids the warranty . To ensure

safe operation for years to come, keep these instructions in a safe place for future reference. K+H has manufactured
this product in accordance with IEC 1992 (SEC) 39 standards, then tested and delivered it in safe operating condition.
To maintain it in this condition, you must:

• observe all safety instructions,

• use the product only as described herein,

• have any maintenance, repairs, or modifications performed only by K+H or other authorized personnel, and

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

Warning!

• When the interior of the cabinet is exposed, touching some parts can lead to an electric shock.

• If you need to gain access to the interior electronics of the unit, always disconnect the unit from any and all power

sources first.

• Any repairs, maintenance, or other service of the unit when its interior compartment is exposed may only be
performed safely (in accordance with VBG 4) by authorized technicians familiar with all the risks
involved. Even in an unplugged state, a fully charged capacitor in the unit can zap the
unsuspecting.

• Loudspeaker output jacks labeled with the IEC 417/5036 emblem (Fig. A, right) may be carrying
dangerously high voltages. If your unit has this emblem, ensure that any connections to be
made between these jacks and the speakers themselves are made before powering up the
unit, and are done so only with manufacturer-approved interconnecting cables.

• If you need to replace any fuses, ensure that the replacements are of exactly the same type,
value and voltage as the originals, as spelled out in the technical specifications at the rear of
this manual.

• Do not use "repaired" fuses.

• If you do not have any fuses on hand of the specified size, type, and value, do not hot-wire the

contacts in the holder by short-circuiting them.

• Certain areas of the cabinet, cover, and rear panel can achieve extreme temperatures and are
therefore marked with a "HOT" label (Fig. B). Refrain from touching any heat sink or ventilation
grille.

• High volume levels are known to cause permanent - i.e. irreversible - hearing damage, especially
when listened to without sufficient breaks. The higher the levels, the more frequent and exten­ded must be the breaks. Avoid standing too close to loudspeakers that are being driven at high
levels. If you must be exposed to high sound pressure levels over an extended period of time,
use hearing protection.

Mains Connection:

• This unit is designed for continuous operation.

• Ensure that the operating voltage of the unit matches that of the local mains current (AC line voltage).

• Always check before connecting the power cable to the mains socket that the power switch on the unit itself is set

to off ("O").

• Use the power cable or power supply that came with the unit to connect to the mains socket (wall outlet).

• Power supply: a damaged power cable may not be repaired. Use a new cable.

• Avoid plugging the mains cable into a power strip that already has several other power-consuming devices

connected to it.

• Avoid using extension cables. The unit must be connected to a mains socket close to it, and that socket should
be freely accessible.

Installation:

• This product may only be placed on a stable, clean, horizontal surface.

• Do not expose this product to vibration.

• Do not operate this product anywhere near water or other liquids. Do not use it near a sink, swimming pool,

bathtub, or in any damp room or area. Electrical shocks carried through water can kill. Do not place any beverages
whatsoever on or near this product, as liquids can kill electronic components.

• Ensure sufficient ventilation around the product to allow for adequate heat dissipation, especially near the rear
panel and the sides of the cabinet (minimum of 8 inches from the nearest wall). The unit may only be installed in
a rack if measures are taken to ensure sufficient ventilation and if the mounting instructions of the manufacturer
are followed. Do not block or cover any heat sink, fan, or vent.

• Do not place the product where it will be in the path of direct sunlight, and keep it a safe distance away from
radiators and other heaters of any kind.

• If you bring this product from a cold environment into a warm one (such as from a vehicle into a studio), it is quite
possible that condensation will form inside the cabinet. Please allow the unit sufficient time for acclimatisation
to room temperature (minimum thirty minutes) before connecting and powering up.

• T o avoid accidents, do not use any accessory equipment with this product which is not approved by the manufacturer ,
particularly mounting accessories. Do not place this unit on any unstable platform, cart, stand or table. Should the
unit fall, it can cause bodily injury to persons, or can be damaged itself.

• To protect this product from lightning damage during a thunderstorm or from power surges during an extended
absence, disconnect the power cable from the wall outlet.

Fig. A

Fig. B

Active Studio Monitor O 200 Page 3

Active Studio Monitor

KLEIN + HUMMEL O 200

Installation - Operation

Figure 1: Front vie w of the O 200 Figure 2: Rear panel of the O 200

Table of Contents:

Safety Instructions ........................ 2

Front- and rear views, table of

contents ....................................3

1. Installation and Operation ....... 4

1.1 Operating conditions...................... 4

1.2 Speaker placement........................ 4

1.3 Mains Connection.......................... 4

1.4 MAINS Switch (POWER) ............... 4

1.5 Mains FUSE .................................. 4

1.6 INPUT, EQUALIZATION, GROUND

LIFT ............................................... 4

1.6.1 Input SENSIVITY, ATTENUATOR..4

1.6.2 Location EQUALIZATION ..............4

1.6.3 GROUND LIFT..............................5

1.7 Front g rille...................................... 5

1.8 Display functions............................ 5

1.9 Care of the cabinet......................... 5

2. Diagrams ..................................5

3. Warranty Information................7

4. Technical Specif ications .......... 8

Page 4 Active Studio Monitor O 200

1. Installation and Operation

It is absolutely essential that you read and observe
the Safety Instructions on page 2 before connecting

or using this device.

1.1 Operating conditions

The K+H model O 200 active studio monitor is intended
for use over a range of ambient temperatures from
+10° C to +40° C (+50° F to +104° F). During transport
or storage, temperatures from -25° C to +70° C (-13°
F to 158° F) are permissible.

1.2 Speaker placement

The loudspeaker chassis used in the O 200 are
magnetically shielded, so you are free to set the
speakers right next to a video monitor without needing
to worry about adversely affecting the screen.
Further more, the baffle of the O 200 is designed in
such a way as to disperse the sound very evenly not
just on axis but over quite a wide listening area. Any
engineer who has sat at a console for any length of
time will appreciate the considerable freedom of
movement afforded by the O 200. The cabinet is
normally designed to be used in the vertical position,
not only for acoustic reasons but also for best cooling.
On the left and right sides of the cabinet you will find
threaded bushings of 8 mm diameter to which the
K+H - bracket LH 26 can be attached. As an alterna­tive, you can use the LH 28 stand-mount adapter in
combination with LH 26 to set the speaker on a
standard 35-mm (1-3/8”) tripod or the LH 29 (+ LH 26)
TV spigot.
Please make certain that the two threaded openings
are always sealed, either with the plastic plugs that
come standard with the cabinets or with the screws
holding the mounting adapter in place. Otherwise you
may experience some air noise and possibly some
degradation in low-frequency response. The same
happens if the plastic plugs on the rear side, covering
the openings for service, are removed.

1.3 Mains Connection

The amplifier electronics of the standard European
model are set up for an AC line voltage of 230 volts,
50 or 60 Hz. Export versions with other voltages are
also available. If the power plug of the mains cable
should ever need to be replaced, ensure that the
connection to the protective earth is maintained.

1.4 Mains Switch (PO WER)

When you switch on power to the unit, there is a three­second delay before the amplified signal is sent to
the drivers. This dela y av oids the loud popping sounds
that otherwise may be generated by devices earlier in
the signal chain as power reaches them. You will find
this arrangement particularly useful if your studio uses

a master switch to power up all the equipment at once.
When power on the O 200 is turned off, on the other
hand, or if there is a general power failure, the signal
flow to the speaker is immediately cut off, preventing
any loud pops.

1.5 Mains FUSE

When replacing the fuse, first disconnect the mains
cable and ensure that the new fuse is of the following

type only:

for 230 V AC 1 A Slo-Blo (5 x 20 mm)
for 117 V AC 2 A Slo-Blo (5 x 20 mm)
for 100 V AC 2.5 A Slo-Blo (5 x 20 mm)

1.6 INPUT , EQU ALIZATION, GROUND LIFT

The sensitivity of the transformer balanced and
floating input is rated at +6 dBu (1.55 volts). The
three - pole female XLR jack is wired in the
standard manner (pin 1 = ground, pin 2 = +,
pin 3 = negative). If you are connecting unbalanced
sources, you will need to solder a bridge between pins
1 and 3:

unbalanced balanced
as seen from solder terminals of male XLR

Figure 3: Pin layout of input connector
Next to the input connector the level controls, the

location equalizer and the ground - lift switch are to
be found. For avoiding unwanted setting, a cover has
to be removed first.

1.6.1 Input SENSIVITY, ATTENUATOR

Near the AF - input - socket there are a continuously
variable attenuator 0...-24 db and a switch for
selecting 0 dBu (0.775 V) or +6 dBu (1.55 V)
sensivity.

1.6.2 Location EQUALIZATION

A four position recessed rotary switch (adjustable
with a screwdriver) is available for frequency
compensation due to speaker placement. For
equalizing anomalies in the lower frequencies due
to proximity to room boundaries:

Position 0 = free space
Position -2.5 = 1 boundary (wall)
Position -5 = 2 boundaries (corner)
Position -7.5 = 3 boundaries (corner + ceiling)

Active Studio Monitor O 200 Page 5

1.6.3 GROUND LIFT

Since the input is balanced, you should rarely
experience any hum. In unusual cases, or if the
source is unbalanced, it may be necessary to se­parate the connection between signal ground and
chassis ground, in which case you will find this
little switch convenient. The chassis ground
remains always connected to the protectiv e earth
conductor of the mains cable.

Warning!
The protective earth conductor must never
be interrupted even for test purposes! This
may be dangerous to Life!

Please make certain that the cover is reinstalled
after finishing the adjustments otherwise you
may experience some air noise and possibly
some degradation in low-frequency response.

1.7 Front grille

To protect the drivers from physical harm, the
O 200 comes with a sturdy plastic - coated metall
grille mounted on the front baffle. The grille can be
removed easily without tools. The acousticall effect
on the speakers is minimal and can only be detected
at all with test equipment.

!

1.8 Display functions

Two LEDs on the front next to the HF - Driver are
indicating the following states:

If the green LED (ON) is lighting, internal power
supply is correct, normal operation.

The red LED (OVL) indicates that the overload­protection circuitry has been triggered, as may
happen while cuing up a tape deck or while running
sine wave signals through the speakers for
measurement purposes. Output power is reduced
to a level that tak es the speak ers out of danger . If
this happens, you must search for the cause and
possibly reduce the monitoring level.

1.9 Care of the cabinet

The cabinet housing of the K+H O 200 active studio
monitor comes standard with a charcoal - grey (RAL
color 7021) colored enamel finish. Handle the cabinet
with care to avoid damaging the finish. To clean the
cabinet, use a soft cloth with a mild cleaning agent
only. Under no circumstances should you use
alcohol - based or chemical agents, nor any cleaners
with abrasive action.

2. Diagrams

The outstanding acoustic impression made by the
O 200 is confirmed by measurements using today’s

most critical test methods. The test plots sho wn here
and on the next several pages are but a small sampling
of these measurements.

Figure 4: Horizontal Directivity

Page 6 Active Studio Monitor O 200

Figure 5: Vertical Directivity

Figure 6: Frequency Response (free field)

Figure 7: THD, 2nd and 3rd order distortion
@ 95 dB/SPL and 1 m distance

Figure 8: Group Delay

Active Studio Monitor O 200 Page 7

Figure 10: Cumulative Spectral Decay Plot
The monitors cumulative spectral decay plot indicates

a very clean decay without any major resonances or
standing waves being evident.

Figure 9: Location equalization

3. Warranty Information

All K+H products undergo an extensive procedure of
quality control testing before leaving the f actory . Bef ore
semiconductors are mounted on the circuit board, they
are subject to rigorous tests. Every single unit is
guaranteed to match its technical specifications within
strict predetermined tolerances.
Please store the original carton in a safe, dry place. If
you should ever need warranty service, put the unit in
its original packing material and carton together with
a detailed description of the problem, and ship it
(freight prepaid) to our distributor or directly to:

KLEIN + HUMMEL GmbH
Customer service
Zeppelinstrasse 12
73760 Ostfildern / Germany

K+H warrants, that the product is free from any defects
in both material and manufacturing and that it meets
the specifications. A warranty case can only be
acknowledged under condition that the complaint is
filed to our distributor or to us in writing within 8 days
after delivery or detection of the fault. Not covered
under this warranty are damages due to inexpert
packing and shipment, wear and tear, improper
handling, installation, operation and maintenance.
The limitation period for warranty claims is described
in the terms and conditions of K+H GmbH. Its our
choice to repair, to supply a ne w product or to withdraw
from the contract.
In the event warranty service is required, presentation
of a warranty card will not be necessary. Proof of
purchase date can be made by filing copies of
appropriate documents (invoice, delivery note).

Figure 11: Max. SPL @ 1m

Page 8 Active Studio Monitor O 200

4. Technical Specifications O 200

Free field frequency response 60 Hz - 20 kHz ± 2 dB

50 Hz - 24 kHz ± 3 dB

Self generated noise level at 10 cm < 20 dB(A)

T otal Harmonic Distortion

125 Hz and above @ 1 m < 0.5 % @ 95 dB/SPL

Maximum SPL

in half space, 3% THD at 1 m distance 110 dB/SPL
averaged between 100 Hz and 6 kHz

Electronics

Po wer amplifiers

Bass amplifier 50 W at 8 Ohm (THD < 0.1 %)
Treble amplifier 50 W at 6 Ohm (THD < 0.1 %)

Crossover section

Crossover frequency 2.5 kHz
Crossover slopes 24 dB / octave

Subsonic filter 40 Hz, 18 dB/octave
Protection circuit against overload of both drivers
Input

Impedance 14 kOhm (transformer balanced floating)

Sensitivity + 6 dBu, switchable to 0 dBu

V olume control continuously variable from 0...-24 dB

Common mode rejection ratio > 60 dB @ 15 kHz

Equalization

4 position switch positioning on rear/side walls 0; -2.5; -5; -7.5 dB

Drivers magneticallay shielded

Bass 6.5” (170 mm) Ø, P olypropylene Diaphragm

Treble 1” (25 mm) Ø, Titanium F abric Dome Tweeter

Connectors Mains 3 - terminal Euro connector

Signal input XLR connector 3-pin female

Po wer consumtion

Idle 15 VA

Full power 120 V A

Mains 230 V A C , 50/60 Hz, other v oltages on request
Dimensions (W x H x D) 207 x 325 x 250 mm
Volume 11.4 liters
Weight 10 kg
Cabinet finish enamel charcoal - grey RAL 7021
Accessories LH 26 mounting bracket

LH 28 tripod bushing (LH 26 mounting bracket required)
LH 29 TV - spigot (LH 26 mounting bracket required)
LH 27 ball clamp mount (LH 26 mounting bracket required)
C 15 eyebolt