Pronomic MC4-600 User manual

Instruction manual
Pronomic MC4-600, MC6-400 power amplifier
ArtNo: 00083665, 00083668
Version 11/2022

Pronomic MC4-600/MC6-400 power amplifier
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© 2022
Thank you for choosing this product. To ensure that you are completely satisfied with this
product, please read this manual carefully.
This manual is protected by copyright. Copying or reprinting, even in excerpts, is only
permitted with the consent of Musikhaus Kirstein GmbH. The same applies to the
reproduction or copying of images, even in modified form.
Content
Connections and controls............................................................................................... 4
Technical specifications ................................................................................................. 6
Rack mounting................................................................................................................ 6
Circuit diagram MC6-400................................................................................................. 7
Circuit diagram MC4-600................................................................................................. 8
Connection examples...................................................................................................... 9
Protective functions...................................................................................................... 10
WEEE Declaration......................................................................................................... 10

Pronomic MC4-600/MC6-400 power amplifier
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The signal word WARNING is used to indicate hazards that can lead to
serious injuries if no precautionary measures are taken.
The signal word NOTE indicates general precautions that should be
observed when handling the product.
Images and screen representations in these operating instructionsmay
differ slightly from the appearance of the actual product, as long as this
does not have a negative impact on the technical characteristics and
safety of the product.
All person-related formulations in these operating instructionsare to be
regarded as gender-neutral.
These operating instructions apply to mature users and to persons who have been supervised or
instructed in the operation of the device by a person responsible for their safety and who have proven
that they are able to handle the device.
Children should be supervised to ensure that theydo notuse this device
as a toy.
Never allow children to play with the packaging materialunsupervised.
Risk of damageto property!We are not liable foraccidents that occur as
a resultofnon-compliancewith the safety instructions or incorrect
handling.
All information inthis operating manual has been checked tothe best of ourknowledge and belief.
However, neither the author nor the publishercan be held liable for any damagerelated to the use
of these operating instructions.
Other product, brand and company names mentioned in this document may be the
trademarks of their respective owners. Compliance with all applicablecopyright laws is the
responsibility of the user of this document.
Do not disassemble or make any modifications to the product. This could result in injury from
electric shock.
If you notice that the power cord shows obvious signs of use, the unit malfunctions or has an
unpleasant odor, something has fallen into the product, the unit has been exposedto rain,
the unit shows obvious changes in performance, or the unit has been dropped, unplug the
unit from the wall outlet immediately and refer servicing, maintenance, or repair to qualified
service personnel or your dealer.

Pronomic MC4-600/MC6-400 power amplifier
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Before cleaning the product, please turn it off and disconnect it from the power. Clean the
product only with a soft, dry cloth. Do not use paint thinners, solvents, cleaning fluids or
chemically impregnated wipes.
Always place the product on a level, stable surface to ensure safe standing.
Do not use the product in a damp or wet environment.
Do not place any objects on the device that could fall into it and do not allow any liquids to
penetrate the inside of the housing.
Do not expose the product to the followingconditions to avoid deformation, discoloration or
major damage:
Direct sunlight, extreme temperature or humidity, excessively dusty or dirty places, strong
vibration or shock, strong magnetic fields.
Do not place the item near other electrical equipment to avoid interference.
Do not use force of any kind when handling the product and do not place heavy objects on it.
Unplug this apparatus during lightning storms or when unused for long periods of time.
Please pull the plug, not the cable.
Please handle the power cable with care. It should not be placed near radiators, you should
not place heavy objects on it and it should be laid in such a way that no person can step on it
or fall over it.
Only connect the power supply to a socket with the correct voltage.
Do not exert excessive force on controls such as switches, knobs, buttons, mounting screws.
This product, when used with headphones or speakers, can produce sound levels that can
cause permanent hearing loss. Do not operate the device at a high volume or at a level that
is uncomfortable for extended periods of time. Seek medical attention if you experience
hearing loss or ringing in the ears.
The device should be placed in such a way that good ventilation is ensured.
Make sure in advance that the speaker, connections, and wiring are suitable for the power
amp's output, otherwise damage may occur.

Pronomic MC4-600/MC6-400 power amplifier
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Connections and controls
1. LED signal indicator
The green LED (ON) lights up when the amplifier is turned on.
The green signal LED (-36dB) lights up to confirm the presence of this input signal on this
channel of the amplifier.
The red LED (clip) lights up when the input level of the power amplifier is exceeded
(overload). If this occurs, you must either turn down the volume of this channel or reduce the
output level of the preceding component. This avoids distortion in the sound image and
prevents damage to the connected speakers.
The yellow protection LED (Pro) lights up as soon as the power amplifier is in protection
mode (see page 10).

Pronomic MC4-600/MC6-400 power amplifier
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2. Power switch
Use this switch to turn the unit on or off. Turn the level controls to 0 before switching on. A
momentary mute is normal when the amplifier is switched on or off.
Attention: Always switch on the power amplifier after all other connected devices. Always
switch off the power amplifier before all other connected devices.
3. Level control
These controls adjust the level of each channel. Turn these knobs counterclockwise when
the clip LEDs are constantly lit, as this indicates that the input signal is toostrong.
4. Mains connection
Use this connector to supply power to the power amplifier.
5. Loudspeaker channel outputs
Use these Speakon compatible connectors to connect to external speakers.
6. Crossover switch
This switch allows you to select the filter type for each channel.
Off = No filters, full range signal is output.
HPF - High Pass Filter. Frequencies below the cut-off frequency (100 Hz) are cut off.
LPF - Low Pass Filter. Frequencies above the cut-off frequency (100 Hz) are cut off.
7. Mode selector switch
This switch on the back of the unit lets you choose between the three operating modes
"Stereo" and "Input Parallel" and "Bridge".
To do this, slide the switch to the appropriate position.
- Stereo mode: Both channels (e.g. channel 1 and 2) work independently.
- Input Parallel: The input signal from one channel pair (e.g. channel 1 and 2) is forwarded to
the other. If a signal is present at channel input 1, it is forwarded to channel input 2.
- Bridged mode (MC6-400 only): In this mode, the power of a pair of channels (e.g., channel
1 and 2) is combined to drive a single speaker. Therefore, make sure in advance that the
speaker, connections and cabling are suitable for this power, otherwise damage may occur.
ATTENTION: Note the minimum load of 8 Ωand the output power of 1200watts in this
mode.
8. Balanced channel inputs
These XLR jack combo jacks are balanced. Balanced connections are recommended
because they are less susceptible to signal interference. For longcable runs, an output
impedance of less than 600 ohms is required to avoid signal loss. For stereo operation, both
channel inputs of the channel pairs (e.g. channel 1 and 2) are used, while for bridged mono
operation only channel inputs 1, 3 and 5 are used.

Pronomic MC4-600/MC6-400 power amplifier
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Technical specifications
MC4-600
MC6-400
Output power (8 Ohm)
4x 600W
6x 400W
Output power (4 Ohm)
4x 900W
6x 600W
Output power (8 Ohm/bridged)
/
3x 1200W
Frequency response (1W into 8 Ohm)
20 Hz - 20 kHz ±0.5dB
20 Hz - 20 kHz ±0.5dB
THD 20 Hz - 20 kHz for 1 W
0.1%
0.1%
THD at 1 kHz and 1 dB under clipping
Signal to noise ratio
103 dB
103 dB
Input sensitivity
Input impedance
20 k Ohm
20 k Ohm
Output voltage rise
40V/sec
40V/sec
Attenuation factor
>400
>400
Input connectors
XLR female, 3-pin
XLR female, 3-pin
Max. voltage gain at 0.775V input
voltage (8 Ohm)
/
/
Max. voltage gain at 1V input voltage
(8 Ohm)
36,3 dB
35,5 dB
Max. voltage gain at 1.44V input
voltage (8 Ohm)
/
/
Max. output voltage (4 Ohm)
70 V
60 V
Max. output voltage (8 Ohm)
70 V
60 V
Output circuit type
Class D
Class D
Output connectors
Speakon compatible, 2-pin
Speakon compatible, 2-pin
LED indicators per channel
On, Level, Clip, Protect
On, Level, Clip, Protect
Mains voltage
230 VAC/50 Hz
230 VAC/50 Hz
Dimensions
480 x 299.5 x 64 mm (1.5 U)
480 x 331.2 x 64 mm (1.5 U)
Weight
5.1 kg
5.8 kg
Panel controls
Mode selection, compressor
Mode selection, compressor
Cooling
Two fans, front to back
airflow, temperature
controlled speed
Two fans, front to back
airflow, temperature
controlled speed
Protection
Short circuit, overload, soft-
start, DC voltage
Short circuit, overload, soft-
start, DC voltage
Rack mounting
This power amplifier is suitable for mounting in standard 19" racks as well as for "stack"
mounting without rack.
Use 4 screws and washers for mounting on the front rack rails. We recommend additionally
securing the unit at the rear or bottom, as the power amplifier is subject to strong vibrations,
especially during mobile use.
If you are mounting the unit in a rack, please make sure that you open the rear door fully to
ensure proper ventilation.

Pronomic MC4-600/MC6-400 power amplifier
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Circuit diagram MC6-400

Pronomic MC4-600/MC6-400 power amplifier
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Circuit diagram MC4-600

Pronomic MC4-600/MC6-400 power amplifier
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Connection examples
The following examples describe the most common methods of usingyour power amplifier in
a sound system. Turn off the power amplifier before making any connections.
Example 1: Input 1 + Input 2, Input Parallel Mode, Crossover Off
Connection via output 1 + output 2 with 8 individual speakers
Example 2: Input 3 + Input 4, stereo mode, high pass filter
Connection via output 3 + output 4 with 2 fullrange tops
Example 3: Input 5 + Input 6, Bridge Mode, Low Pass Filter
Connection via output 5 + output 6 with 1 single subwoofer

Pronomic MC4-600/MC6-400 power amplifier
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Protective functions
Output current protection function
When the output current of the amplifier channel exceeds the specified peak current, e.g.:
short circuit at the output, the amplifier is tuned for 1000ms and restarts automatically after
the short circuit condition disappears.
Overvoltage protection
When the operating voltage exceeds the maximum operating voltage or falls below the
minimum operating voltage, the device will enter protection mode and shut down the power
supply. Operation above 240VAC voltage may cause current damage.
Temperature protection
There is a temperature protection in the device which monitors the temperature of the heat
sink and the power supply simultaneously. If the temperature of the heat sink exceeds the
critical temperature, the output power is limited. When the temperature of the power supply
exceeds the critical temperature, the output is disabled. As soon as the temperature reaches
the limit again, the output stage is automatically reactivated.
WEEE Declaration
(Waste of Electrical and Electronic Equipment)
Your product has been designed and manufactured using high quality materials and components that
are recyclable and reusable. The symbol means that your product must be disposed of separately
from household waste at the end of its service life. Dispose of this device at your local collection point
or recycling center.
Please help protect the environment in which we all live.
All technical data and appearances are subject to change without notice. All information was correct at
the time of printing. Musikhaus Kirstein GmbH does not warrant the accuracy or completeness of the
descriptions, photographs or statements contained in this manual. Printed colors and specifications
may vary slightly from the product. Products of Musikhaus Kirstein GmbH are sold only through
authorized distributors. Distributors and dealers are not representatives of Musikhaus Kirstein GmbH
and are not authorized to legally bind Musikhaus Kirstein GmbH in any way.
Musikhaus Kirstein GmbH
Bernbeurener Straße 11
86956 Schongau - Germany
Phone: [phone]