APART MA-35 User manual

MA-35
OWNER’S MANUAL
MIXING AMPLIFIERSMIXING AMPLIFIERS
• 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 the AC 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
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2
43 5
FRONT PANEL
1. Power switch
To turn the power on and off.
2. Power / limit indicator
This led will light green after powering on and working under normal conditions.
When you draw too much power from your MA35, this led will turn red, telling you you're 3 dB under the peak power
and limiting starts.
For the best sound and longest life this led should be kept green, giving you a safe margin.
This device has convection cooling and should operate within his normal level, which is maximum 35 watts. See that
heat can be dispersed in an easy way. Keep +/- 10 cm free space to the MA35's top and sides.
Temperature protect : in case of overheating, the amplifier will switch itself off and reset after cooling down. However,
please check your impedance of the speakerlines which is probably too low (overload !!)
In case of doubt, contact your APart dealer
In case of temp-protect, the indicator will be OFF with the unit switched on.
3. Mic.1 input
This balanced input has been wired in parallel with the XLR and Din5 input at the back.
Use either one of the three inputs for microphone 1. Microphone 1 can be given a priority over all the other inputs by
using the VOX priority (see 21-22).
4. Input 1-2-3-4 volume controls
By turning each control clockwise the desired level of that input in the total mix is set.
To decrease these levels, turn counterclockwise.
The volumes of the inputs not in use, should be set fully counterclockwise. If not, hiss might occur.
5. 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.
REAR PANEL
7. Voltage selector
Set the local voltage. If any doubt, contact your dealer. The unit is shipped with the selector set to 230VAC.
8. Mains socket
The unit can be connected to the mains circuit by a standard IEC type power cord. This socket contains a 1AT, 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 bring the MA35 to a qualified service centre. First check whether you didn't use a quick-blow fuse!
9. DC power inlet
The MA35 can be fed from any 12VDC power supply such as your car battery. The voltage can be slightly higher, up to
14VDC.
10. Speaker output (max. 35 watts)
For low impedance use COM and 8 ? . Keep impedance above 8 ? .
For 70 or 100V speaker lines use COM and 70 or 100V terminals. Don't mix the types of speaker connections. Only one at
the time should be used. For 100V operation, the minimum impedance has to be 286 ? . For 70V operation the minimum
impedance should be 140 ? .
11. Mute control terminals
By shorting this terminals the signals coming from inputs 3 and 4 will be muted and the chime will be activated, if the chime
level has been turned on (see 19 ).
12. Ground terminal
By connecting external equipment to your MA35, hum noise might occur. Connecting this terminal to the functional terminal
of the other equipment may reduce this noise. A more common solution to get rid of buzz (ground loops) is to use a
ground-loop isolator in the signal path.
13. Pre amp in / out
You can send the signal of the preamplifier to an external device such as an equalizer (APart PXQ2215) or limiter and feed
the treated signal back into the amplifier via the poweramp input. When you don't use this feature, the RCAbridge should
be placed.
14. Rec out
When you need a copy of the contents you page, you can connect this output to any recording device such as tape decks,
MD recorders, VHS recorders, etc….You can also use this output to feed an extra amplifier. When you connect your MA35
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 DI-box or other signal levelling device. Never connect this output to
an amplifier loudspeaker output!
15. Line 4 input
Here you can connect any line level stereo device such as tuners, CD players, MD players, etc….
16. Line 3 / Mic 3 input
Use only one of these parallel wired inputs at the time! For line levels see 15. 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 20.
17. Mic 2 XLR / JACK
Use only one of these parallel wired balanced inputs at the time! See wiring diagram at the back. You can use an
unbalanced microphone on the Jack input. WARNING! When you have activated the phantom power you should NOT
branch any unbalanced jack!
18. Mic 1 XLR / DIN5
Use only one of these parallel wired balanced inputs at the time! See wiring diagram at the back. These two inputs have
been wired in parallel with the balanced jack input at the front. When you use theAPart MICPAT or MICPACB paging
microphones, connected directly to the DIN5 input, the signals fed into input 3 and 4 are muted automatically while paging.
To use VOX MUTE see 21.
19. Chime level
When you use the mute/chime contacts of the DIN5 connector or the mute contacts described in item 11, the level of the
chime can be set with this attenuator. When you turn him completely counterclockwise NO chime shall be heard.
7 8
9 10 11
12 13 14 15 16 17 18 19
The MA35 is a very compact PAsystem with the features of a real professional.
With its three balanced microphone and two rca line inputs, this little one has a lot of potential.
You even will be able to page from your car.
The MA35 complies with the CE standards.
Before using your MA35, take a few minutes to read these instructions carefully.
This little time can avoid a lot of headaches afterwards.
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MIXING AMPLIFIERSMIXING AMPLIFIERS
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MA35 INSIDE CONTROLS
20. Phantom on/off jumper
The MA35 has been shipped with this jumper in the OFF position. When you set this jumper to the ON position,
phantom power will be supplied to all microphone inputs, so you can use condenser microphones.
In this case NO unbalanced jacks should be used! Phantom power does not damage dynamic microphones.
21. Vox mute on/off jumper
The MA35 has been shipped with this jumper in the OFF position. When you set this jumper to the ON position,
vox muting will be activated on input 1.
This voice activated mute overrides the hard mutes activated by mute contacts. In this way a two level mute is
available. The level at which vox muting starts is to be set by internal attenuator 22.
22. Vox sense level
With this attenuator you set the audio level at which vox muting starts for microphone 1.
This is only possible when the vox on/off jumper is set to the ON position. You need to set this level, otherwise
background noise or a noise picked up by your microphone cable might already activate the vox mute.
23. Power supply fuse
When this fuse blows, replace it by the same type: 6A quick blow.
When this happens frequently, contact your nearest dealer.
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!
1.5 W 1.5 W 1.5 W 1.5 W 3 W 3 W 3 W 6 W 6 W
27 W 1.5 1.5 1.5 1.5 3 3 3 6 6
+ + + + + + + +=
TUNERPAGING
MIC
23
20 21 22
Inside settings should only be done by persons familiar to electrical equipment!
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 35 watts at 100V,
this means that the minimum impedance connected should be at least 167 ohm (100x100/35).
To check your loudspeaker lines use a decent impedance checker (example AP WM100).
How to deal with 100V loudspeaker systems
InputMIC1 (Front / Rear)
MIC2
MIC3/LINE3
LINE4
Power amp in
Output Power RMS
Rated
Music - Program
Speaker outputs
Pre amp out
Record out
Chime
Priority system
Limiter
Frequency Range
S/N Ratio
Distortion
Power supply
Dimensions (H x W x D)
Weight
Bal. Jack / Bal XLR - DIN5 (1mV)
Bal. Jack - XLR (1mV)
Bal. Jack - XLR (1mV) / RCA Cinch (300 mV)
RCA Cinch (300 mV)
RCA Cinch (1V)
35 watt
40 watt
8 Ohm, 70 - 100 Volt (Euroblock)
RCA Cinch (1V)
RCA Cinch (350 mV)
Yes (ding-dong) via contact closure (Euroblock)
2-step priority mute system (VOX / contact closure)
Dynamic-slow @ -3 dB, defeatable via internal jumper.
60 Hz - 18 kHz
-67dB (mic open), -77dB (all at zero)
< 0.5%
12V DC (Euroblock)- 230V AC
88 x 272 x 286 mm
4.75 Kg
Technical specifications