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Biamp Systems, 10074 S.W. Arctic Drive, Beaverton, Oregon  97005  U.S.A.        (503) 641-7287        www.biamp.com 

 
 

MXA Series 

Mixer/Amplifiers 

 

Operation Manual 

 
 

IMPORTANT SAFETY INSTRUCTIONS 

1) Read these instructions. 
 
2) Keep these instructions. 
 
3) Heed all warnings. 
 
4) Follow all instructions. 
 
5) Do not use this apparatus near water. 
 
6) Clean only with dry cloth. 
 
7) Do not block any ventilation openings. Install in 
accordance with the manufacturer’s instructions.  
 
8) Do not install near any heat sources such as 
radiators, heat registers, stoves, or other 
apparatus (including amplifiers) that produce heat. 
 
9) Do not defeat the safety purpose of the 
polarized or grounding-type plug.  A grounding 
type plug has two blades and a third grounding 
prong. The third prong is provided for your safety. 
When the provided plug does not fit into your 
outlet, consult an electrician for replacement of the 
obsolete outlet. 
 
10) Protect the power cord from being walked on 
or pinched particularly at plugs, convenience 
receptacles, and the point where they exit from the 
apparatus. 

 

11) Only use attachments/accessories specified by 
the manufacturer.  
 
12) Unplug this apparatus during lightning storms or 
when unused for long periods of time. 
 
13) Refer all servicing to qualified service 
personnel. Servicing is required when the 
apparatus has been damaged in any way, such as 
power-supply cord or plug is damaged, liquid has 
been spilled or objects have fallen into the 
apparatus, the apparatus has been exposed to rain 
or moisture, does not operate normally, or has been 
dropped. 
 
14) WARNING - To reduce the risk of fire or electric 
shock, do not expose this apparatus to rain or 
moisture. 
 
15) The MAINS plug or appliance coupler is used 
as the disconnect device.  This disconnect device 
must remain redily accessible after installation. 
 
16) In order to comply with international safety 
requirements for operating temperature, clearance 
of at least 5cm or 1.97" must be maintained 
between this device and other rack-mounted 
devices. This spacing will ensure that all exposed 
metal surfaces are safe to touch. 

 

 
 

Explanation of safety related markings and symbols which appear on the outside of the apparatus. 

 

 

Lightning Bolt:  Hazardous Live voltages present when this unit is in operation.  Do not touch terminals 
marked with this symbol while the unit is connected to live power. 
 

 

Exclamation Point:  Replace components (i.e. fuses) only with the values specified by the 
manufacturer.  Failure to do so will compromise safe operation of this unit. 

Summary of Contents for MXA Series

Page 1: ...htning storms or when unused for long periods of time 13 Refer all servicing to qualified service personnel Servicing is required when the apparatus has been damaged in any way such as power supply co...

Page 2: ...29Aug07...

Page 3: ...ophone line input channels channel 1 selectable for 600 ohm transformer tel input rear panel trim peak indicator on each input channel 48 Volt phantom power selectable on each input channel automatic...

Page 4: ...line tel BIAMP SYSTEMS 120V F U S E F U S E O phantom pwr priority auto mute manual mute 80dB on on on on 20dB phantom pwr priority auto mute manual mute 80dB on on on on 20dB phantom pwr priority au...

Page 5: ...d as cut only This also precludes boosting of the Bass control see above in these applications DIP Switches The five DIP switches above each input are used to assign specific functions to those indivi...

Page 6: ...utputs from the amplifier From the factory a jumper wire is installed from the 4 terminal direct output to the xfmr input terminal For transformer xfmr output connect speaker negative to the com termi...

Page 7: ...al screws for the 100 volt tap and Com connections 4 Strip 0 25 6 4mm of insulation from each lead 5 Slide one piece of the supplied heat shrink tubing on to each wire 6 Crimp the ring lug terminals o...

Page 8: ...range Tone Controls Treble Bass High Pass Filter Power Consumption MXA35 MXA75 MXA150 MXA300 Dimensions all models height 2 rack spaces width depth Weight MXA35 MXA75 MXA150 MXA300 Compliance 35 watt...

Page 9: ...7 BLOCK DIAGRAM...

Page 10: ...epairs or installed in any manner that does not comply with BIAMP Systems recommendations 4 Electro mechanical fans electrolytic capacitors and normal wear and tear of items such as paint knobs handle...

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