Микшер-процессор APART MA125. Инструкция на английском языке

MIXING AMPLIFIERS                                                                    MIXING AMPLIFIERS
MA125
Find more interesting audio solutions at www.apartaudio.com
The MA125 is developed by
Audioprof nv
Lanteernhofstraat 90
BE-2100 Deurne
BELGIUM
info@apart-audio.com                                      OWNER’S MANUAL
www.apart-audio.com

MIXING AMPLIFIERS                                                                    MIXING AMPLIFIERS
Technical Specifications
SAFETY INFORMATION
General
The MA125 is a very compact, professional PA mixing amplifier for commercial and industrial applications.  All   Mains voltage  230/115 VAC or 24VDC
microphone inputs have integrated speech filters.  He's able to drive 8-ohm or constant-voltage loudspeaker   Rated output  125W RMS
40Hz  22kHz (+1/-3 dB)
Frequency response
lines (50-70-100V).                                                                  Distortion    <0,5% @ -6dB, 1kHz
The amplifier has 4 microphone, 4 selectable line inputs and one emergency/telephone input.    Bass control  +/- 10dB, 100 Hz
Mic input 1 is meant to be the main microphone paging input, for its signal can be fed via the front ?” TRS   Treble control  +/- 10dB, 10 kHz
S/N           amplifier: better than 95dB
phone jack or via a XLR3, DIN 5 or euro block connector at the back.  When needed, two APart paging   line:         better than 81dB
microphones can be wired in parallel on each mic input!                                            mic:         better than 70dB
The MA125 has a three level priority system.  The emergency/telephone input at the back has the highest   LED indicators  limiter active, red
signal 100%, yellow
priority.  Its signal goes directly to the main amplifier, bypassing any front control, and an attenuator next to   signal -25 dB, green
the input sets its level.  Microphone input 1 has the second priority level.  With the control next to the DIN5   power on, green
input, the vox (voice activated) mute for microphone 1 can be activated and mutes all other signals, except   Muted by priority LED  protection active, red
any of the priority modes active, red
the emergency input.  The third level can be activated via a dry contact (“priority over music”) and mutes all   Weight  approx.9 kg
background music inputs only.  This contact activates the chime as well, only when a level has been set using   Dimensions  430(W) x 102(H) x 230(D) mm, desktop mounted
the “chime level” potentiometer.                                                                   19” wide, 2U high,
rack mounted (height = 88mm)
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.                                            Inputs                                       Outputs
Mic input 1; ?” TRS phone jack at the front; XLR3, DIN5; Euro block
Speaker zone output, euro block
Sensitivity   1,5 mV                         High Z zone   100V
When needed, the signals mixed via your MA125 mixing amplifier, can be recorded or distributed via the   Impedance  600 ?         Speaker out; euro block
S/N (at max. volume)
> 70 dB
record output.                                                                       Phantom power  14 V                          High Z        50 (20 ? )  70 (39,2 ? )  100V (80 ? )
Frequency response  > 90Hz-> 15Khz (+1/-3 dB); speech filter  Low Z  8 ?
19” Brackets are shipped along with your amplifier.                                  Vox mute      trigger level 0,6 mV, 1Khz, mutes mic 2,3,4+music,
> 40 dB                       Phantom power
Mic input 2,3 & 4: XLR3 balanced             Mic 1-2-3-4   14V; on / off switch
The MA125 is the device to built professional industrial sound applications.  You can insert an extra equalizer   Sensitivity  1,5 mV
(such as the APart PXQ2215) into the signal path or add extra power amps (APart PA240P), using the pre   Impedance  600 ?         Pre amp out
amp out/power amp in RCA connectors.  When shipped a RCA bridge has been inserted.   S/N (at max. volume)  > 70 dB                Level         1V
Phantom power
14 V
Frequency response  > 90Hz-> 15Khz (+1/-3 dB); speech filter  Record out; RCA mono
The MA125 complies with the CE standards.                                            Emergency input; euro block                  Level         1V
Sensitivity   1 V                            Priority out
Impedance     600 ?                          Level         24 V DC; max 0,6A, short circuit
S/N (at max. volume)  > 85 dB                              protected
Important Safety Instructions                                                        Frequency response  > 90Hz-> 20Khz (+1/-3 dB);
Mute          mutes all, > 40 dB             Chime         2 tone
Aux input; RCA                                             activated by contact closure
Before using your MA125, take a few minutes to read these instructions carefully.  This little time can avoid a   Sensitivity  500 mV (-6 dB)   on/off and level set by trimmer
lot of headaches afterwards.                                                         Impedance     22 k?                          Priority
S/N (at max. volume)  > 81 dB                              Emergency input / Telephone
Frequency response  > 50Hz-> 20Khz (+1/-3 dB)       I      200 mV; 1 kHz
1.Keep this manual for future reference.                                             Line 4; RCA                                                mutes all other signals
2.Water and humidity are the biggest enemies of electric equipment.  Operating it under moist conditions can even be        Sensitivity  200 mV (-14 dB)  > 40 dB
dangerous.                                                                        Impedance     47 k?                                        Vox mute only for mic 1
3.Clean only with dry cloth.                                                         S/N (at max. volume)  > 81 dB                       II     0,6 mV; 1 kHz
4.Do not operate near heaters or place it on other apparatus which produce a lot of heat.  Frequency response  > 50Hz-> 20Khz (+1/-3 dB)        mutes mic 2,3 & 4 + music
on/off/level set by trimmer
CD in
5.Be sure your unit is always connected to the electrical safety earth.  Do not defeat the safety purpose of a grounding-  type   Sensitivity  500 mV (-6 dB)  > 40 dB
plug.  If you have any doubt, please consult your dealer or a qualified technician.  Impedance     30 k?                                 III    Priority contact
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.  S/N (at max. volume)  > 81 dB  > 40 dB
7.Only use accessories specified by the manufacturer.                                Frequency response  > 50Hz-> 20Khz (+1/-3 dB)              mutes all music inputs
8.Distorted sound indicates that operating conditions are bad.  Decrease the volume, check the speakers and   Tuner
sources connected, or switch off the unit.                                        Sensitivity   300 mV (-10 dB)
Impedance
30 k?
9. Disconnect the unit from the mains power supply, when you do not use it for a longer period.  S/N (at max. volume)  > 81 dB
10. When smoke ore bad smell comes from your MA125, switch off immediately and disconnect from mains.  Frequency response  > 50Hz-> 20Khz (+1/-3 dB)
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!
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MIXING AMPLIFIERS                                                                    MIXING AMPLIFIERS
How to deal with 100V loudspeaker systems                                             Front panel
85 W    =   1.5  +  1.5  +  1.5  +  1.5  +  3   +  3   +  3   +  10  +  60
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1.5 W  1.5 W  1.5 W  1.5 W  3 W  3 W  3 W   10 W   60 W                                                                                     2
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PAGING
MIC               AMPLIFIER POWER > LOUDSPEAKER LOAD POWER                               4   5     6    6    7  8   9    10      11    12    13
1.   Power switch Turns mains power on and off.
In fact working with 100V loudspeakers is rather simple, when done in the right way.  2.   Protect indicator This red LED illuminates when one of the protections have been activated.  No or distorted
Each 100V loudspeaker has a 100V transformer which can be set to a certain power,   sound will be heard anymore.  This will be in case of overheating being the result of drawing too much power from
for example: 1,5  3 or 6W.  As the example shows, the sum of all loudspeaker settings should never   your amplifier or the impedance of the speaker lines connected are below the minimum load impedance (see 17).
exceed the amplifier's power specifications.
Never use low impedance (= 8 ohm) loudspeakers on a 100Volt system, even not one.   3.   Level indicators/clip-limit A green LED will light after powering on.  To work within normal conditions the volume
indicator should be kept under 0dB (100%). At -2,5dB a limiter will be activated. This red LED indicates that the “auto
gain circuit” keeps the level below clipping.  This is NOT a clip indicator, but an indication of the “automatic gain
More technically:  When your paging amp has a maximum output of 125 watts at 100V,   control”.
this means that the minimum impedance  connecte d should be at least 80 ohm (100x100/125).
4.  Microphone 1 input This balanced ?” TRS phone jack has been wired in parallel with the other three input options
To check your loudspeaker lines use a decent  impedance checker (example AP WM100).
for microphone 1 at the back.
For normal operation, use only one input at the time for microphone 1, but when useful two microphone inputs of mic 1
Now you are ready to get the best result on distributing your music and messages to your audience.
can be used together (see note below).  Microphone 1 can be given a priority over all the other inputs, except the
Your little giant is like a Swiss knife which will astonish you and many others!  emergency input (see 20), by using the VOX priority (see 30).
Troubleshooting                                                                         5.  Microphone 1 level control Adjusts the volume of the microphone connected to one of the four input connectors
(1/4” jack, XLR3, DIN5 or euro block).
No power: Check whether the “on/off” switch is in the on position and whether the power cord has been inserted properly.  If
these two have been checked and still the MA125 remains off, the fuse might be blown.
6.  Microphone 2  3 level control By turning each control clockwise the desired level of that input in the total mix is
set.  To decrease these levels, turn counter-clockwise.  The volumes of the inputs not used (open lines), should be set
No sound: Check all the wires and loudspeaker selectors. At least the master and one source should be turned clockwise.    fully counter-clockwise.  If not, hiss might occur.
Check whether the pre amp out is connected to the power amp in.  In the worst case your MA125 is in protective mode.
Please check your loudspeaker wiring and loads.  Operate your MA125 within normal conditions.
7.  Microphone 4 / line 4 level control Adjusts the input signal of the microphone connected to the XLR3 input at the
back or the line source connected to stereo RCA input 4 (for example a wireless microphone, see 27).
Distorted sound: Your input signal is too high.  Haven't you a line level source connected to a microphone input?  You
might also be drawing too much power from your MA125 and the loudspeaker load might be too low (minimum 80 ohm for   8.  “Muted by priority” led This red led will blink when any priority status has been activated (see also 18).
100V use).
Check the speaker wiring and load with an impedance tester.  Turn down the master level.
9.  Music level control Here you can adjust the level of the line source selected.
Hum and buzz: Please check your wiring and grounding, maybe you created a ground loop. See that all equipment linked
are drawing power from the same power supply.  Your radio might get its signal from the cable radio.  In this case you have   10.  Line source selector Select the desired music source to be heard (AUX, CD or TUNER).
created a ground loop and a ground loop isolator between the cable signal and your radio antenna input will be the solution.
11.   Bass control Adjust as per your taste.  In reverberant rooms intelligibility can be increased by decreasing bass.
The centre position gives you a flat response.
Any suggestion?                                           12.   Treble control Adjust the level as per your taste or needs.  Adding high frequencies gives brilliance to your
sound.  High frequency feedback can be removed by decreasing treble.  The centre position gives you a flat response.
13.   Master level control Here you can adjust the desired volume of the overall signal.
They are well appreciated and eventually rewarded!
Send your ideas or suggestions to                                                  Important notice: 2x4 = Eight microphones possible!
When you use more than one microphone input at the time, in super markets for instance, it is important to use real
suggestion@apart-audio.com.                                       paging microphones (APart MICPAT; MICPACB).  These microphones maintain the microphone input impedance
when not switched on.  This avoids unwanted noise to come out of your loudspeakers.  APart MA mixing amplifiers
accept two APart microphones wired in parallel on each mic input at the time, which can be a very useful tool.
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