Question about Behringer Ultrabass Bxl3000 300w 1x15" Bass Combo

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Not functioning.. I got a behringer ultrabass bxl300 for my bass ive had it for 4 months and all of a sudden the speaker starts sounding weak and it gets quieter and quieter after an hour. it would never do this before im guessing somethings not right inside of it im not a tech person or anything like that so im open for suggestion because i need this fixed asap thnx

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I would check it with a different instrument cable AND bass guitar. If you end up with the same results, it's a thermal issue with the amp and will require factory authorized repair. The amp heats up and the intermittent component starts failing....more heat, more failure. It's not an easy fix and your Behringer repair shop will have their work cut out for them with this repair.

Posted on Nov 01, 2012

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Posted on Jan 02, 2017

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SOURCE: hey, just purchased some behringer

The setting of the volume controls bears LITTLE importance to the actual level the unit is being run at since one can send high levels INTO the units from the source. These are intended to be used in a studio for the audio engineer to listen to in a small room. They should really be no louder than a consumer BoomBox maximum.

A squeaking noise is not normal at a level such as mentioned however. You might see if the noise is from the speaker itself or possibly parts of the cabinet... Plastic parts are NOTED for squeeking and can be suitably lubricated.

Beyond that, since the units are new, you should be able to exercise your warranty.

Posted on Mar 11, 2011

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SOURCE: Behringer's Ultrabass BXL3000 Gain knob broken

You need to replace the potentiometer with the broken shaft. You can open the unit and try to get a part number or go to Behringer parts to get an exact replacement. The pot must be matched for value, taper, and mounting and shaft dimensions.

Posted on Jun 07, 2010

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SOURCE: I've got a Behringer Ultrabass Bb410 1200w 4x10

The cabinet is listed as a 4 ohm unit.

We would exoect to see four, 4 ohm speakers in series parallel or four 16 ohm speakers in parallel.

If teh unit seems to rattle, first put an audio oscillator into it and sweep the frequency. It is common for grilles and also logos attached to them to rattle.

Open the unit and power each speaker the same way individually for a test.

I suspect you will find either the grille or mounting hardware is actually doing the rattling OR possibly the wires inside are vibrating.

If the sound is a scratchy buzz, then the speaker(s) have probably had voicecoils damaged by overheating.

In this case, buy 4 new speakers and replace all. It is not likely to find replacements for the Buggera brand they put in these cabinets. Also the word on the web about that brand of speaker is not very good.

Posted on Sep 22, 2010

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SOURCE: As soon as I turn

How do you know you are at 40 WATTS? This takes electronic test equipment to measure.
Tests to run. Observe the speaker cone with power off. Now turn it on... did it displace and stay there? If so you have a failure of the amplifier itself. Next, If you can place finger on the cone, move it gently in and out feeling for any roughness. If you feel roughness, the voice coil is fried and you be buying new speaker. A lot of the Ultra bass Behringer's use LM3886 power amp chips... sometimes in parallel, and a failure of one could cause this.

Posted on Aug 23, 2011

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Contact Behringer to get part number FIRST, then go to this website to see if they have it available. http://www.dbmproaudio.com/behrparts.html

It should be a standard 1/4" mono jack, so you can always go somewhere like Radio Shaft or PartsExpress.com and get one. You certainly don't 'HAVE' to get a certified Behringer part for this. Good luck! :)

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It should be a standard 1/4" mono jack, so you can always go somewhere like Radio Shaft or PartsExpress.com and get one. You certainly don't 'HAVE' to get a certified Behringer part for this. Good luck! :)

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How do you know you are at 40 WATTS? This takes electronic test equipment to measure.
Tests to run. Observe the speaker cone with power off. Now turn it on... did it displace and stay there? If so you have a failure of the amplifier itself. Next, If you can place finger on the cone, move it gently in and out feeling for any roughness. If you feel roughness, the voice coil is fried and you be buying new speaker. A lot of the Ultra bass Behringer's use LM3886 power amp chips... sometimes in parallel, and a failure of one could cause this.

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The cabinet is listed as a 4 ohm unit.

We would exoect to see four, 4 ohm speakers in series parallel or four 16 ohm speakers in parallel.

If teh unit seems to rattle, first put an audio oscillator into it and sweep the frequency. It is common for grilles and also logos attached to them to rattle.

Open the unit and power each speaker the same way individually for a test.

I suspect you will find either the grille or mounting hardware is actually doing the rattling OR possibly the wires inside are vibrating.

If the sound is a scratchy buzz, then the speaker(s) have probably had voicecoils damaged by overheating.

In this case, buy 4 new speakers and replace all. It is not likely to find replacements for the Buggera brand they put in these cabinets. Also the word on the web about that brand of speaker is not very good.

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