APart-Audio MA200 User manual

MA200
OWNER’S MANUAL
MIXING AMPLIFIERSMIXING AMPLIFIERS
The MA200 is developed by
Audioprof nv
Lanteernhofstraat 90
BE-2100 Deurne
BELGIUM
[email protected]
www.apart-audio.com

MIXING AMPLIFIERSMIXING AMPLIFIERS
101
The MA200 is a professional 4 zone PA mixing amplifier for commercial and industrial applications.
Rarely seen on its competitors, all microphone inputs have integrated speech filters and they are high-class
transistor-balanced type, allowing good control of hum and noise over long cables.
He's able to drive 8-ohm or constant-voltage loudspeaker lines (50-70-100V).
The amplifier has integrated radio, 4 microphone inputs, 4 selectable line sources 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 combo XLR3/jack, DIN 5 or euroblock connector at the back.
The MA200 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 XLR 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.
4 Zones can be individually switched on and off.
Compared to other zone amplifiers, the total load (200W) can be drawn in any combination from the 4 zones.
Zone 4 has an extra feature. Via the selectors at the front, you can choose whether this zone receives back ground
music only, messages only, both or none of them.
When any priority has been activated, 24V DC output (max.1A) will be available to activate priority relays of
loudspeaker attenuators or other devices.
When needed, the signals distributed via your MA200 mixing amplifier, can be recorded via the record output.
19” Brackets are shipped along with your amplifier.
The MA200 is the all in one device to built larger 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 MA200 complies with the CE standards.
Before using your MA200, 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 are 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 MA200, 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. We advise to use the back mounting holes as well; certainly in mobile racks.
14. Do not block the air inlets of the amplifier and see that sufficient cool air can be supplied.
15. Please check the units' condition after unpacking. If the outside of the carton box has been damaged,
inform your shipper immediately.
16. Check all speaker lines for load charge (by APart wattmeter WM100) and short circuits, before connecting
them to your amplifiers!
APart MA200 mixing amplifier
Important Safety Instructions
MA200 BLOCK DIAGRAM
PHANTOM
2
31
PHANTOM
2
31
MUTE
JP4
PHANTOM
2
31
MUTE
JP5
PHANTOM
2
31
MUTE
JP11
MUTE
VOX
MUTE
+
-
+
-
+
-
+
-
AUX
CD
TUNER
Pre Amp
Pre Amp
Pre Amp
Pre Amp
+
-
CHIME
REQ OUT
PreAmp
OUT PowerAmp IN
+
-
MASTERTONE
MUTE +
-
+
-
POWER AMP
AUTO GAIN
CONTROL
100V
70V
50V
8 ohm
COM
24V/1A
PRIORITY
-
+
+
Z1
+
Z2
+
Z3
DIN5
+
MUSIC
+
MICRO
MUTED BY
PRIORITY
+
-VOX
Pre Amp
1V
EMERGENCY
TELEPHONE
TRAFO
VOLUME
INPUT1
VOLUME
INPUT2
VOLUME
INPUT3
VOLUME
INPUT4
VOLUME
INPUT5
300mV
TUNER OUT
L
R
500mV
CD
IN / OUT
L
R
500mV
AUX
200mV
LINE 4
L
R
1.5mV
MIC 4
1.5mV
MIC 3
1.5mV
MIC 2
1.5mV
MIC 1
PRIORITY
XLR3
SCREW4
ZONE1
ZONE2
ZONE3
ZONE4
+
-
Hi-Q Pre Amp
SPEECH FILTER
+
-
Hi-Q Pre Amp
SPEECH FILTER
+
-
Hi-Q Pre Amp
SPEECH FILTER
+
-
Hi-Q Pre Amp
SPEECH FILTER
PROTECT SIGNALON 100% LIMIT
CHASSIS AUDIO GND
FUSEFUSE
SWITCH
POWER SUPPLY
24Volt DC INPUT
JP3

MIXING AMPLIFIERSMIXING AMPLIFIERS
29
Outputs Speaker selector
Zone 1 3 on/off
Zone 4 paging on/off music on/off
Speaker zone output, euro block
High Z zone 1-2-3-4 100V
Speaker out; euro block
High Z 50 (12,5 ? ) 70 (24,5 ?) 100V (50 ? )
Low Z 8 ?
Phantom power
Mic 1-2-3-4 14V; internal jumpers
Pre amp out
Level 1V
Record out; RCA mono
Level 1V
Priority out
Level 24 V DC; max 1A, short circuit protected
Chime 2 tone
activated by contact closure;
euro block DIN5
on/off and level set by trimmer
Priority I Emergency input / telephone
200 mV; 1 kHz VOX threshold
mutes all other signals
> 40 dB
II Vox mute only for mic 1
0,6 mV; 1 kHz VOX threshold
mutes mic 2,3 & 4 + music
on/off/level set by trimmer
> 40 dB
III Priority contact
> 40 dB
mutes all music inputs
Technical Specifications
1. Power switch. Here you can switch the power on and off.
2. Overload indicator. This red LED illuminates when one of the protections have been activated. No or distorted
sound will be heard anymore. This will be in case of overheating, being the result of drawing too much power from
your amplifier, or the impedance of the speaker lines connected are below the minimum load impedance (see17).
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 control”.
4. Zone selectors. With these selectors you can activate the zone outputs. A green led at the left of the switches will
confirm that you have activated zone 1 to 3. For zone 4, two selectors are available. By means of those two selectors
you can decide to send background music only, spoken messages only, both or none of them. Two yellow leds will
confirm your selection. When you have selected the music only mode for zone 4, there will be silence during paging.
5. Master level control. Here you can adjust the desired volume of the overall signal.
6. Microphone 1 input. This balanced ¼” TRS phone jack has been wired in parallel with the other three input
options for microphone 1 at the back. For satisfying operation, use only one of these inputs at the time for microphone
1. Microphone 1 can be given a priority over all other inputs by using the VOX priority (see 29).
7. Microphone 1 level control. Adjusts the volume of the microphone connected to one of the four input connectors
(1/4” jack, XLR3 combo jack, DIN5 or euro block).
8. 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 in use, should be set fully
counter-clockwise. If not, hiss might occur.
9. Microphone 4 / line 4 level control. Adjusts the input signal of the microphone connected to the XLR combo jack
at the back or the line source connected to stereo RCA input 4.
10. “Muted by priority” led. This red led will blink when any priority status has been activated.
11. Music level control. Here you can adjust the level of the line source selected.
12. Line source selector. Select the desired music source to be heard (AUX, CD or TUNER).
13. 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.
14. 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.
Front panel
14
3
5
2
106 13 14
Frequency response 40Hz 25kHz (+1/-3 dB)
Distortion <0,3% @ -6dB, 1kHz
Bass control +/- 10dB, 100 Hz
Treble control +/- 10dB, 10 kHz
S/N amplifier: better than 95dB, 22Hz 22kHz
line: better than 80dB, 22Hz 22kHz
mic: better than 65dB, 22Hz 22kHz
LED indicators limiter active, red
signal 100%, yellow
signal -25 dB, green
power on, green
protection active, red
Zone active indicators Z1, Z2 and Z3 green LED
Z4 music on/off, orange
Z4 paging allowed on/off, orange
Muted by priority LED any of the priority modes active, red
Weight approx.12,7 kg
Dimensions 430(W) x 88(H) x 356(D)mm
19” wide, 2U high
Operating temperature -10 to +45°C
Inputs Mic input 1; ¼” TRS phone jack at the front;
XLR3 combo, DIN5; Euro block
Sensitivity 1,5 mV
Impedance 600 ?
S/N (at max. volume) > 65 dB
Phantom power 14 V (internal jumper)
Frequency response > 80Hz->15Khz (+1/-3 dB)
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) > 65 dB
Phantom power 14 V (internal jumper)
Frequency response > 80Hz->15Khz (+1/-3 dB)
Emergency input; euro block
Sensitivity 1 V
Impedance 600 ?
S/N (at max. volume) > 80 dB
Frequency response > 100Hz-> 25Khz (+1/-3 dB)
Mute mutes all, > 40 dB
Aux input; RCA
Sensitivity 500 mV (-6 dB)
Impedance 22 k?
S/N (at max. volume) > 80 dB
Frequency response > 40Hz-> 25Khz (+1/-3 dB)
Line 4; RCA
Sensitivity 200 mV (-14 dB)
Impedance 47 k?
S/N (at max. volume) > 80 dB
Frequency response > 40Hz-> 25Khz (+1/-3 dB)
CD in
Sensitivity 500 mV (-6 dB)
Impedance 5 k?
S/N (at max. volume) > 80 dB
Frequency response > 40Hz-> 25Khz (+1/-3 dB)
Tuner
Sensitivity 300 mV (-6 dB)
Impedance 30 k?
S/N (at max. volume) > 80 dB
Frequency response > 40Hz-> 25Khz (+1/-3 dB)
7 8 8 9 11 12

MIXING AMPLIFIERSMIXING AMPLIFIERS
15. Voltage selector. Set the local voltage. If any doubt, contact your dealer. The unit is shipped
with the selector set to 230VAC.
16. Mains socket. The unit can be connected to the mains circuit by a standard IEC type power cord. This socket
contains a 6,3AT, slow blow fuse. Use a screw driver to flip out the fuse compartment and to replace it by the same
type. When this fuse blows frequently, you should check the speaker load or bring the MA200 to a qualified service
centre. First check whether you didn't use a quick-blow fuse!
17. Zone 100V loudspeaker outputs. When you need to activate/deactivate separate loudspeaker zones, you
should use these 100V outputs. These connectors should only be used for 100V operation. They are activated by the
selectors at the front (see 4). Don't use these 100V outputs together with the 8 ohm, 50V or 70V terminals.
The minimum impedance of all 100V loudspeaker lines together should be at least 50? (100Vx100V/50? = 200watt).
18. Emergency power supply. You can power the amplifier directly from an emergency battery or power supply
supplying 24V DC/20A.
19. Loudspeaker outputs. For low impedance use com and 8? . Keep impedance above 8?.
For 50, 70 or 100V speaker lines use COM and 50, 70 or 100V terminals.
For 100V operation, the total minimum impedance of the loudspeaker lines should be 50 ? . For 70V operation the
minimum impedance should be 24,5 ? and for 50V 12,5 ? .
Don't mix the types of speaker connections. Only one at the time should be used, unless you are able to calculate a
combination which does not overload the amplifier (example: 100? at 100V for a loud zone in combination with 25? at
50V for a quiet zone).
20. 24V DC output. At this terminal (-/+) 24V DC will be available (max. 1A) from the moment a priority has been
activated, to control priority relays of local volume attenuators or other devices.
21. Power amp in / pre amp out. You can send the signal of the pre-amplifier to an external device such as an
equalizer (APart PXQ2215) or limiter and feed the treated signal back into the amplifier via the power amp input.
From the “pre-amplifier out” you can also feed extra power amplifiers such as the Apart PA240P. Don't forget to feed
the signal back into the “power amp in”. When you don't use this feature, the RCA bridge should be placed.
22. Tuner output mono. Here you can recover a fixed signal of the internal tuner to feed other devices such as your
telephone's 'music on hold' system.
23. Rec. out. When you need a copy of the total mix, you can connect this output to any recording device such as
tape deck, MD recorder, VHS recorder, etc….You can also use this output to feed an extra amplifier. This output level
cannot be controlled separately. When you connect your MA200 pre amp out or record out to a microphone input of
another mixing amplifier, this input will have signal overload and the sound will be masked. In this case you should
use a line input, a DI-box or other signal levelling device. Never connect this output to an amplifier loudspeaker
output!
24. CD stereo input, 500mV. Use these stereo RCA inputs to connect a line level source such as CD players, MD
players, etc…. You have to make your choice with the selector at the front (see 12). Stereo signals will be summed
together.
15
16
17
18 19 20
21 22 24 24 2523 25 26 26 27 28
2730293132 28 33
Back panel
3 8
• Read all documentation before operating your equipment.
Retain all documentation for future reference.
• Save the carton and packing material even if the equipment has arrived in good condition.
Should you ever need to ship the unit, use only the original factory packing.
• Do not spill water or other liquids into or on the unit.
• Make sure power outlets conform to the power requirements listed on the back of the unit.
• Do not use the unit if the electrical power cord is frayed or broken.
• Always operate the unit with theAC ground wire connected to the electrical system ground.
• Have gain controls on amplifiers turned down during power-up to prevent
speaker damage if there are high signal levels at the inputs.
• Do not connect the inputs / outputs of amplifiers or consoles to any other voltage source,
such as a battery, mains source, or power supply, regardless of whether
the amplifier or console is turned on or off.
• Power down & disconnect units from mains voltage before making connections.
• Do not use the unit near stoves, heat registers, radiators, or other heat producing devices.
• Do not block fan intake or exhaust ports. Do not operate equipment on a surface or in an
environment which may distort the normal flow of air around the unit. If the unit is used in an
extremely dusty or smoky environment, the unit should be periodically "blown free" of dust.
• Do not remove the cover. Removing the cover will expose you to potentially dangerous voltages.
• Do not drive the inputs with a signal level greater than that required to drive equipment
to full output.
• Do not run the output of any amplifier back into another input.
• Do not ground the red output terminal, never connect a red output terminal to
another red output terminal.
• In case of mal-function this device should be serviced by qualified service personnel only.
SAFETY INFORMATION
!!
C A U T I O N
TO REDUCE THE RISK OF ELECTRIC SHOCK
DO NOT REMOVE COVER OR BACK
NO USER-SERVICEABLE PARTS INSIDE
SERVICING ONLY FOR QUALIFIED PERSONNEL

MIXING AMPLIFIERSMIXING AMPLIFIERS
25. Line 4, input, 200mV/ Mic 4 input. Use only one of these parallel wired inputs at the time! For line levels see
24. To the XLR3 balanced input you can connect any microphone using a balanced, two wire shielded, cable.
(1=earth / 2 =hot / 3=cold). For using condenser microphones see 34. The Microphone 4 input is a XLR3/combo jack,
which will accept a normal XLR3 male plug or a ¼” TRS phone jack.Line 4 is more sensitive than the other line
(music) inputs, therefore ideal to connect wireless microphone receivers.
26. Mic 2 & 3 XLR inputs. To the XLR balanced input you can connect any microphone using a balanced, two wire
shielded, cable. (1=earth / 2 =hot / 3=cold). For using condenser microphones see 34.
27. Mic 1 XLR/DIN5/Euro block input. Use only one of these parallel wired balanced inputs at the time! See wiring
diagram at the back. These three inputs have been wired in parallel with the balanced jack input at the front. When
you use the APart MICPAT or MICPACB paging microphones, connected directly to the DIN5 input, the signals fed into
the line inputs are muted automatically while paging. The same kind of connection can be made using the euro block
connector. To use “vox mute” see 28.
Phantom power: use condenser microphones see next page.
28. Vox mutes all. When you activate “vox mute” by turning this trimmer clockwise to the desired threshold level, the
signal of any Mic1 input has priority. When you don't need “vox mute”, turn this trimmer fully counter-clockwise to the
“OFF” position.
29. Priority over music contact. By closing the contact of the euro block connector or contacts 4 and 5 of the DIN5
connector, the signal of microphone 1 only has priority over the music sources (TUNER, CD and AUX). All other
microphones will remain active. The contact closure of the contacts mentioned can give priority to the other
microphone inputs as well. At the same time 24 V DC will be available at terminal 20. This is very useful when using
up to 4 microphones in supermarkets, etc…
30. Chime level. When one of the priority contacts are closed a chime can be activated by turning this trimmer
clockwise to the desired chime level. When you don't need a chime, turn this control fully counter-clockwise to the
“OFF” position.
31. Emergency / telephone input. Here you can feed the audio source for paging emergency messages, etc.. This
input, at line level, has automatic activation above 200mV and has a line transformer to avoid ground loops (useful for
telephone). Please use a balanced, shielded line cable. Connect the HOT signal to +, the COLD to and the shield to
G (when connecting the shield only at the MA200 side, you might avoid a ground loop, which creates hum and buzz).
This signal is directly fed into the main amplifier.
No microphones should be connected directly to this input without using a mic to line pre-amplifier.
32. Emergency / telephone level. With this potentiometer you can set the desired level of the line level signal
inserted into the priority signal input 32. This level will not be influenced by the “master” level.
33. Airflow output. This airflow output should be kept free at all times! To give the fan a longer life time, he only
starts running when the heatsink reaches a certain temperature.
47
Now you are ready to get the best result on distributing your music and messages to your audience.
Your little giant is like a Swiss knife which will astonish you and many others!
In fact working with 100V loudspeakers is rather simple, when done in the right way.
Each 100V loudspeaker has a 100V transformer which can be set to a certain power,
for example: 1,5 3 or 6W. As the example shows, the sum of all loudspeaker settings should never
exceed the amplifier's power specifications.
Never use low impedance (= 8 ohm) loudspeakers on a 100Volt system, even not one.
More technically: When your paging amp has a maximum output of 200 watts at 100V,
this means that the minimum impedance connected should be at least 50 ohm (100x100/200).
To check your loudspeaker lines use a decent impedance checker (example AP WM100).
How to deal with 100V loudspeaker systems
1.5 W 1.5 W 1.5 W 1.5 W 3 W 3 W 3 W 60 W 60 W
135 W 1.5 1.5 1.5 1.5 3 3 3 60 60
+ + + + + + + +=
PAGING
MIC AMPLIFIER POWER > LOUDSPEAKER LOAD POWER
Find more interesting audio solutions at www.apart-audio.com

MIXING AMPLIFIERSMIXING AMPLIFIERS
MA200 Series
5 6
Phantom on / off jumper
The MA200 has been shipped with these jumpers in the OFF position. For each microphone input a jumper is
available. When you put a jumper to the ON position, phantom power will be supplied to the microphone input
involved so you can use condenser microphones. In this case NO unbalanced jacks should be used! Phantom power
does not damage dynamic balanced microphones.
Power supply fuse (inside the housing)
When this fuse blows, replace it by the same type: 20A quick blow. When this happens frequently, contact your
nearest dealer.
Now you are ready to build your solid sound system and our extra features will be of great help.
Note: In our policy of continuous improvement, changes can appear without prior notice, including the user manual.
Troubleshooting
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 MA200 remains off, the fuse might be blown.
No sound: Check all the wires and loudspeaker selectors.
At least the master and one source should be turned clockwise.
Check whether the pre amp out is connected to the power amp in.
In the worst case your MA200 is in protective mode.
Please check your loudspeaker wiring and loads.
Operate your MA200 within normal conditions.
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 MA200 and the loudspeaker load
might be too low (minimum 50 ohm for 100V use).
Check the speaker wiring and load with an impedance tester. Turn down the master level.
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 created a
ground loop and a ground loop isolator between the cable signal and your
radio antenna input will be the solution.
Inside settings should only be done by persons familiar to electrical equipment!
JP11JP5JP4JP3
MIC1 : JP3
MIC2 : JP4
MIC3 : JP5
MIC4 : JP11
Phantom Power
Inside Settings
• High quality 200 Watts 100 Volt mixing amplifier
• Integrated AM/FM tuner and CD/MP3 player
• 4 mic (phantom via internal switch), 4 line inputs
• 3 level priority system, 24V priority output
• Integrated 2-tone chime (adjustable volume)
• 4 output zones. (Zone 4: Mic / music selection)
• Build in dynamic limiter (-3 dB)
• Dimensions: 88 (h) x 430 (w) x 375 (d) mm
MA200CDR
• Same as above, with AM/FM tuner only
MA200R
• Same as above, without any music source
MA200