Klein + Hummel M52, M52 D Installation And Operation Manual
Control Monitor
M
5
2
M52 D
Installation und Bedienung
Installation and Operation
1
Contents
SAFETY INSTRUCTIONS................................................................................................................................2
2 M52 CONNECTION AND OPERATION ........................................................................................................3
2.1 OPERATING VOLTAGE ........................................................................................................................................................3
2.2 ANALOGUE INPUT .............................................................................................................................................................3
2.3 POWER SWITCH ................................................................................................................................................................3
2.4 VOLUME KNOB..................................................................................................................................................................3
2.5 BATTERY CONNECTION DC 12-20 V .................................................................................................................................3
2.6 SAFETY FUSE....................................................................................................................................................................3
2.7 PLACEMENT AND MOUNTING ............................................................................................................................................. 3
3 M52D CONNECTION AND OPERATION......................................................................................................3
3.1 OPERATING VOLTAGE.......................................................................................................................................................3
3.2 INPUT SELECT ..................................................................................................................................................................3
3.3 ANALOGUE INPUT ............................................................................................................................................................3
3.4 DIGITAL INPUT XLR / BNC .............................................................................................................................................. 4
3.5 POWER SWITCH ...............................................................................................................................................................4
3.6 VOLUME KNOB.................................................................................................................................................................4
3.7 BATTERY CONNECTION DC12–20V.................................................................................................................................. 4
3.8 SAFETY FUSE...................................................................................................................................................................4
3.9 PLACEMENT AND MOUNTING ............................................................................................................................................4
4 OPERATION ............................................................................................................................................5
4.1 ON/OFF SWITCH.............................................................................................................................................................. 5
4.2 MONITORING LOUDNESS...................................................................................................................................................5
5 WARRANTY INFORMATION.....................................................................................................................5
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
• 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 labelled with the IEC 417/5036 emblem (Fig. A) 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.
Fig. A
•
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 fuses 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.
Fig. B
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 acclimation to room
temperature (minimum thirty minutes) before connecting and powering up.
• To avoid accidents, do not use any accessory equipment with this product that is not approved by the manufacturer,
particularly mounting accessories.
• Do not place this unit on any unstable platform, cart, stand or table. If the unit falls, 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.
2
2 M52 Connection and
Operation
2.1 Operating Voltage
The M52 control monitor has a built in power
supply which accepts line voltages between AC
85 - 230 Volt / 50-60 Hz and is compatible with
batteries having 12 – 20 Volt DC outputs.
2.2 Analogue Input
The analogue audio signal connects to a 3-pin
XLR wired with Pin 1 = GND, Pin 2 = +, Pin 3 = -,
via an internal floating transformer and requires
an input level of +6 dBu (1.55 Volts). For
unbalanced connections wire a jumper across pin
1 and pin 3 as shown below.
3
unbalanced balanced
seen from the solder terminals of the male XLR
The audio input level must never exceed 7 Volts.
f the unit turns on the
to turn the unit from
be found on the back side
as
2.3 Power Switch
The switch on the back o
internal power supply. A red LED on the front
panel indicates the standby condition. A second
switch built into the volume knob on the front
panel turns the unit from standby into
operation.
2.4 Volume Knob
The volume knob is used
standby to on and to adjust the audio listening
level. When the unit is in standby the LED glows
red and then turns to green when the unit is
operating.
2.5 Battery Connection DC 12-20 V
The battery connection is made to a 4 pin male
XLR connector on the back side. Please observe
the correct polarity wth Pin 4 = 12-20V, Pin 1 =
GND. An internal diode will protect the
electronics if wired incorrectly.
2.6 Safety Fuse
The AC power fuse can
of the monitor. In order to access the fuse for
the battery power connection it is necessary to
remove the back cover. Only replace fuses with
the proper type and rating:
AC 230 V 800 mA SB (5 x 20 mm)
Battery 12 –20 V 3150 mA SB (5 x 20 mm) internal
2.7 Placement and Mounting
Place the Mini Monitor so that the listening
distance is between 0.5 meters (1.5’) and 1.5
meters (5’). For listening to stereo turn both
monitors in toward the listener.
The 3/8“ bushing on the bottom of the unit may
be used for attachment to a standard
microphone stand. The M6 attachment points on
the sides may be used with the LH11 table
stand.
3 M52D Connection and
Operation
3.1 Operating Voltage
The M52 D control monitor has a built in power
supply which accepts line voltages between AC
85 - 230 Volt / 50-60 Hz and is compatible with
batteries having 12 – 20 Volt DC outputs.
3.2 Input Select
The inputs selector allows monitoring of either
the left or right channels of a digital input or the
mono sum of the left and right digital channels.
In the analogue position, the XLR input
connector is changed over to an analogue input.
3.3 Analogue Input
The analogue audio signal connects to a 3-pin
XLR wired with Pin 1 = GND, Pin 2 = +, Pin 3 =
-, via an internal floating transformer and
requires an input level of +6 dBu (1.55 Volts).
For unbalanced connections wire a jumper
across pin 1 and pin 3 as shown below.
unbalanced balanced
as seen from the solder terminals of the male XLR
The audio input level must never exceed 7 Volts.
Important: The BNC selector switch must be set
to 75 ohm termination (3rd position from the
left) when not using a digital input.
3.4 Digital Input XLR / BNC
The AES digital signal contains two audio
channels being transmitted in one cable. The left
and right channels may be selected individually
with the selector knob on the front panel of the
monitor. The AES digital connection to the XLR
input is point-to-point and may not be looped.
When using the AES 3id or SP-DIF connection
into the BNC it is possible to connect more mini
monitors by using T-connectors. In this
configuration make sure that the 75 ohm
termination is switched off in all monitors except
for the last one in the chain.
When using a pair of monitors together it is
possible to connect them together via a BNC
cable. Feed the AES digital audio signal into the
first monitor. Set the selector switch next to the
BNC connector on the first monitor to the XLR
position. This setting changes the BNC to a
looping output from the XLR.
3.5 Power Switch
The switch on the back of the unit turns on the
internal power supply. A red LED on the front
panel indicates the standby condition. A second
switch built into the volume knob on the front
panel turns the unit from standby into
operation.
3.6 Volume Knob
The volume knob is used to turn the unit from
standby to on and to adjust the audio listening
level. When the unit is in standby the LED glows
red and then turns to green when the unit is
operating.
3.7 Battery Connection DC12–20V
The battery connection is made to a 4 pin male
XLR connector on the back side. Please observe
the correct polarity wth Pin 4 = 12-20V, Pin 1 =
GND. An internal diode will protect the
electronics if wired incorrectly.
3.8 Safety Fuse
The AC power fuse can be found on the back side
of the monitor. In order to access the fuse for
the battery power connection it is necessary to
remove the back cover. Only replace fuses with
the following type and rating:
Netz 230 V 800 mA SB (5 x 20 mm)
Battery 12 –20 V 3150 mA SB (5 x 20 mm) internal
3.9 Placement and Mounting
Place the Mini Monitor so that the listening
distance is between 0.5 meters (1.5’) and 1.5
meters (5’). For listening to stereo turn both
monitors in toward the listener.
The 3/8“ bushing on the bottom of the unit may
be used for attachment to a standard
microphone stand. The M6 attachment points on
the sides may be used with the LH11 table
stand.
4
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