Question about Behringer Ultracoustic Acx900 Acoustic Guitar Amplifier

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Acx900 service manual

Looking for schematics and/or service manual for Behringer Ultracoustic Acx900 Acoustic Guitar Amplifier.

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Posted on Jan 02, 2017

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SOURCE: No sound out of amplifier

check the fuse

Posted on Dec 25, 2008

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SOURCE: I need to get the service manual or just a

Try here... this is for a B212A but should be VERY close to the D version.

Posted on Feb 10, 2011

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SOURCE: Hello, Is (are) the schematic(s) for the Behringer


download manual at link above

Posted on Mar 12, 2011

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SOURCE: Will this processor (Behringer LX1X

It should work.

Posted on Sep 11, 2011

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1 Answer

Where do can I get a copy of the schematics.

You can download 2 manual per day, else you have to take & pass the electronics test :-)

Feb 21, 2016 | Behringer ULTRACOUSTIC ACX1800 2x8...

1 Answer

Is the right output transistor part number the same as the left output transistor.

Should be provided you only have a single transistor in the output power stage. If you have a pair of transistors in push pull arrangement, then those two units for that one individual channel will be different.

Feb 21, 2016 | Behringer ULTRACOUSTIC ACX1800 2x8...

1 Answer

Behringer troubleshooting

Check instrument cable, cable jack on guitar, cable jack on pedal. If pedal has gigged much, the last is most probable

Sep 04, 2014 | Behringer Am400 Acoustic Modeler Pedal +...

1 Answer

No sound from amp. Turns on, but seems to be clipping out and is popping. Any troubleshooting advice?

check the connector where your instrument cable comes in. Make sure you are getting a good connection. Unfortunately, there is likely a bigger problem.

Jul 23, 2012 | Behringer ULTRACOUSTIC ACX1800 2x8...

1 Answer

Where is the serial number on a crate amplifier

Real basic owners manual is here:

Look at the chassis, or pull a part number off the original speaker to match speaker and back cross reference to the amp versions that used it. The OM is at least good enough with the block diagram to allow it to be serviced easily enough.

Feb 21, 2012 | Crate CA6110DG Gunnison Acoustic Guitar...

1 Answer

Acx1800 no bass very small volume, brand new do i put my speakers in phase?

If you are sure that the input device (I'm assuming electro-acoustic guitar) is working properly then it sounds like a clear case for return to the vendor! If it is brand new then don't even try to repair it. The phase buttons on the guitar channel are to help reduce feedback by putting the body of the guitar out of phase with the speakers. The speakers should all be in phase with each other though.

Sep 10, 2011 | Behringer ULTRACOUSTIC ACX1800 2x8...

2 Answers

Low volume for a 180 watt amp, does this amp have one 180 watt power amp or two 90 watt power amps?

If there are stereo effects , like chours and delay it more than likely has 2 90watt amps

Jul 08, 2011 | Behringer ULTRACOUSTIC ACX1800 2x8...

1 Answer

BEHRINGER AM400, I seem to be getting what appears to be a hissing sound coming from my brand new acoustic modeler pedal. If I turn the "attack" level right down it seems to reduce the problem....

First of all you should try to use another guitar - if the problem is still there try using different batteries or another power supply unit and finally a different amplifier. If none of these actions lead to success i would send it back if i were you.

When you buy equipment you should always test it at the shop to avoid such problems!

Feb 26, 2011 | Behringer Am400 Acoustic Modeler Pedal +...

1 Answer

Berhinger acx 1000, power on, no sound amp not working, everything lights up on display but no sound or amplification

Just had the baby brother (ACX450) with this problem...opened the amp... screws from sides and or top (including 2 hidden under handle covers).

The power cable from the power transformer had come off the connector on the circuit board in spite of goo they had put on it. Put connector back on and secured the cable and works perfect,

Since your display lights, yours is likely a different problem. I have also seen similar ones that the cable to the speaker had been pulled off its connection on the circuit board, rendering no sound. See if you have sound at headphone jack. and if none, how about the preamp output jack? Note you will only hear the left side using earphones as these jacks are monaural.

Feb 06, 2011 | Behringer Ultracoustic Acx900 Acoustic...

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