MIXING AMPLIFIERS
MIXING AMPLIFIERS
1
Technical Specifications
Outputs
Speaker zone output, euro block
High Z zone
100V
Speaker out; euro block
High Z
50 (20 ? ) 70 (39,2 ? ) 100V (80 ? )
Low Z
8 ?
Phantom power
Mic 1-2-3-4
14V; on
/
off switch
Pre amp out
Level
1V
Record out; RCA mono
Level
1V
Priority out
Level
24 V DC; max 0,6A, short circuit
protected
Chime
2 tone
activated by contact closure
on/off and level set by trimmer
Priority
Emergency input / Telephone
I
200 mV; 1 kHz
mutes all other signals
> 40 dB
Vox mute only for mic 1
II
0,6 mV; 1 kHz
mutes mic 2,3 & 4 + music
on/off/level set by trimmer
> 40 dB
III
Priority contact
> 40 dB
mutes all music inputs
General
Mains voltage
230/115 VAC or 24VDC
Rated output
125W RMS
Frequency response
40Hz 22kHz (+1/-3 dB)
Distortion
<0,5% @ -6dB, 1kHz
Bass control
+/- 10dB, 100 Hz
Treble control
+/- 10dB, 10 kHz
S/N
amplifier: better than 95dB
line: better than 81dB
mic: better than 70dB
LED indicators
limiter active, red
signal 100%, yellow
signal -25 dB, green
power on, green
protection active, red
Muted by priority LED
any of the priority modes active, red
Weight
approx.9 kg
Dimensions
430(W) x 102(H) x 230(D) mm, desktop mounted
19” wide, 2U high,
rack mounted (height = 88mm)
Inputs
Mic input 1
; ¼” TRS phone jack at the front; XLR3, DIN5; Euro block
Sensitivity
1,5 mV
Impedance
600 ?
S/N (at max. volume)
> 70 dB
Phantom power
14 V
Frequency response
> 90Hz-> 15Khz (+1/-3 dB); speech filter
Vox mute
trigger level 0,6 mV, 1Khz, mutes mic 2,3,4+music,
> 40 dB
Mic input 2,3 & 4
: XLR3 balanced
Sensitivity
1,5 mV
Impedance
600 ?
S/N (at max. volume)
> 70 dB
Phantom power
14 V
Frequency response
> 90Hz-> 15Khz (+1/-3 dB); speech filter
Emergency input; euro block
Sensitivity
1 V
Impedance
600 ?
S/N (at max. volume)
> 85 dB
Frequency response
> 90Hz-> 20Khz (+1/-3 dB);
Mute
mutes all, > 40 dB
Aux input; RCA
Sensitivity
500 mV (-6 dB)
Impedance
22 k?
S/N (at max. volume)
> 81 dB
Frequency response
> 50Hz-> 20Khz (+1/-3 dB)
Line 4; RCA
Sensitivity
200 mV (-14 dB)
Impedance
47 k?
S/N (at max. volume)
> 81 dB
Frequency response
> 50Hz-> 20Khz (+1/-3 dB)
CD in
Sensitivity
500 mV (-6 dB)
Impedance
30 k?
S/N (at max. volume)
> 81 dB
Frequency response
> 50Hz-> 20Khz (+1/-3 dB)
Tuner
Sensitivity
300 mV (-10 dB)
Impedance
30 k?
S/N (at max. volume)
> 81 dB
Frequency response
> 50Hz-> 20Khz (+1/-3 dB)
The
MA125
is a very compact, professional PA mixing amplifier for commercial and industrial applications. All
microphone inputs have integrated speech filters. He's able to drive 8-ohm or constant-voltage loudspeaker
lines (50-70-100V).
The amplifier has 4 microphone, 4 selectable line inputs and one emergency/telephone input.
Mic input 1 is meant to be the main microphone paging input, for its signal can be fed via the front ¼” TRS
phone jack or via a XLR3, DIN 5 or euro block connector at the back. When needed, two APart paging
microphones can be wired in parallel on each mic input!
The MA125 has a
three level priority system
. The emergency/telephone input at the back has the highest
priority. Its signal goes directly to the main amplifier, bypassing any front control, and an attenuator next to
the input sets its level. Microphone input 1 has the second priority level. With the control next to the DIN5
input, the vox (voice activated) mute for microphone 1 can be activated and mutes all other signals, except
the emergency input. The third level can be activated via a dry contact (“priority over music”) and mutes all
background music inputs only. This contact activates the chime as well, only when a level has been set using
the “chime level” potentiometer.
When the priority contact has been activated, 24V DC (max.0,6A) will be available to activate priority relays of
loudspeaker attenuators or other devices.
When needed, the signals mixed via your MA125 mixing amplifier, can be recorded or distributed via the
record output.
19” Brackets are shipped along with your amplifier.
The
MA125
is
the
device to built professional industrial sound applications. You can insert an extra equalizer
(such as the APart PXQ2215) into the signal path or add extra power amps (APart PA240P), using the pre
amp out/power amp in RCA connectors. When shipped a RCA bridge has been inserted.
The
MA125
complies with the CE standards.
Important Safety Instructions
Before using your
MA125
, take a few minutes to read these instructions carefully. This little time can avoid a
lot of headaches afterwards.
1.Keep this manual for future reference.
2.Water and humidity are the biggest enemies of electric equipment. Operating it under moist conditions can even be
dangerous.
3.Clean only with dry cloth.
4.Do not operate near heaters or place it on other apparatus which produce a lot of heat.
5.Be sure your unit is always connected to the electrical safety earth. Do not defeat the safety purpose of a grounding- type
plug. If you have any doubt, please consult your dealer or a qualified technician.
6.Take care for the power cord. Never use a damaged power cord and install it in such a way that no one can walk on it.
7.Only use accessories specified by the manufacturer.
8.Distorted sound indicates that operating conditions are bad. Decrease the volume, check the speakers and
sources connected, or switch off the unit.
9. Disconnect the unit from the mains power supply, when you do not use it for a longer period.
10. When smoke ore bad smell comes from your MA125, switch off immediately and disconnect from mains.
11. This apparatus should only be serviced by qualified personnel. If not, the warranty might be void.
12. Do not remove the cover panel. Removal of the cover will expose hazardous voltages.
13. Do not block the air inlets of the amplifier and see that sufficient cool air can be supplied.
14. Please check the units' condition after unpacking. If the outside of the carton box has been damaged, inform your
shipper immediately.
15.
Check all speaker lines for load charge (by APart wattmeter WM100) and short circuits,
before connecting them to your amplifiers!
SAFETY INFORMATION
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