Klein + Hummel O110 D Installation And Operation Manual

Installation and Operation

O110 D

Active
Studio Monitor

Page 2 Active Studio Monitor O 110 D

Safety InstructionsSafety Instructions

Safety InstructionsSafety Instructions

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 92 (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

Active Studio Monitor O 110 D Page 3

Active Studio Monitor

KLEIN + HUMMEL O 110 D

Installation - Operation

Figure 2: Rear panel of the O 110 D

Table of Contents:

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

Table of Contents....................................................3

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

1.1 Operating Conditions.....................................4

1.2 Installation....................................................4

1.3 Connection to Mains Current..........................4

1.4 POWER Switch............................................4

1.5 Mains Power Fuse.........................................4

1.6 Input / Room Compensation / Ground Lift.........4

1.6.1 XLR Input..................................................4

1.6.2 BNC - Input................................................5

1.6.3 Level ATT(ENUATOR)...............................5

1.6.4 INPUT SELECT Switch..............................5

1.6.5 Equalization...............................................5

1.6.6 Ground Lift................................................6

1.7 Display Functions.........................................6

1.7.1 Overload Protection....................................6

1.8 Care of the Cabinet........................................7

2. Diagrams............................................................7

3. Warranty Information...........................................9

4. EC Declaration of Conformity.............................9

5. Compliance to FCC Rules..................................9

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

Figure 1: Front view of the O 110 D

Page 4 Active Studio Monitor O 110 D

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 110 D 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 Installation

The loudspeaker chassis used in the O 110 D are
magnetically shielded, allowing these loud­speakers to be mounted side by side with
a video or computer monitor without adversely
affecting the screen. One of the finer features
of the O 110 D active studio monitor is its unusually
uniform off - axis directivity, which results in a very
wide ”sweet spot”. Preferred placement of the
cabinet is in the upright position, for the dispersion
in the verical plane was intentionally kept narrower
than in the horizontal.

In certain cases, for example if there are hard,
reflective surfaces both to the left and right of
the loudspeakers, it would make sense to
operate the loudspeakers on their side. The
reduced horizontal directivity in this position would
then be helpful in minimizing any phase cancel­lation caused by comb - filter effects.

When considering placement, please take into
consideration the possibilities offered by both of
the room compensation switches described in
section 1.6.5.

On the back of the unit you will find two M8-style
threaded bushings for use with various mounting
options. These holes are labeled ”Speaker mount
option.” The bushings will accommodate either the
LH 32 wall bracket adapter or the LH 31 mounting
bracket for use with additional mounting
accessories.

The plastic screws that occupy theseThe plastic screws that occupy these

The plastic screws that occupy theseThe plastic screws that occupy these

The plastic screws that occupy these
threaded holes from the factory may notthreaded holes from the factory may not

threaded holes from the factory may notthreaded holes from the factory may not

threaded holes from the factory may not
be used for the actual mounting of abe used for the actual mounting of a

be used for the actual mounting of abe used for the actual mounting of a

be used for the actual mounting of a
loudspeaker under any circumstances.loudspeaker under any circumstances.

loudspeaker under any circumstances.loudspeaker under any circumstances.

loudspeaker under any circumstances.

Please ensure that these threaded holes are
always plugged so that the volume of air sealed
within the cabinet may only pass through the
precisely calculated bass - reflex openings.

1.3 Connection to Mains Power

Several versions of the O110D are available for
different mains voltages. Please verify the label on
the back side of the device is correct. If it
becomes necessary to use a different mains­cable plug, pay attention to proper grounding
when wiring a replacement plug.

1.4 POWER Switch

When you switch power on, there is a 7 second
delay before the amplified signal is sent
to the loudspeakers. This delay prevents the loud
popping sounds that otherwise are generated
by prior devices in the signal chain as they are
switched on. 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 110 D is turned off, on the
other hand, or if there is a general power failure in
the area, the signal flow to the speaker is
immediately stopped, preventing any loud pops.

1.5 Mains Power Fuse

Should you ever need to replace the power fuse,
please ensure (first of all that the unit is unplugged
from the mains!) and that only the following type
and value of fuse is used:

For 230-240 volts AC: 1 A Slo-Blo (5 x 20 mm)
For 117 volts AC: 2 A Slo-Blo (5 x 20 mm)
For 100 volts AC: 2.5 A Slo-Blo (5 x 20 mm)

1.6 Input analog-digital / Level / Room
Compensation / Ground Lift

1.6.1 XLR - INPUT

ANALOG / DIGITAL - AES/EBU

The sensitivity of the electronically balanced
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

In digital mode, this same XLR input accepts the
digital signal according to the AES/EBU
specification (110 Ohm balanced).

!

!