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Hum and Buzz Ground Loop

Behringer Truth B2031A Studio monitors always produce a humm and buzz when switched on. How do we prevent noisy monitors?

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Best way is with balanced audio lines. Use either XLR or TRS cables IF your devices have those connections.

Also, do NOT use light dimmers as these are often a source of the higher frequencies that cause buzz.

Also power ALL the interconnected audio devices from a single source outlet rrather than from mulltiple building receptacles.

Posted on Jul 28, 2009

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I have extreem amount of noise between my tascam 2488 to computer based recording program , how can I delete the noise ?


What kind of noise is it? If it is hum or buzz, then you probably have a ground loop. If it is hiss, then you are picking up noise in the cable, most likely. For ground loops, see: http://www.audioholics.com/home-theater-connection/ground-loops-eliminating-system-hum-and-buzz

As for the cable, the cheap ones with the red and gray plastic ,olded ends can get noisy after awhile as the shielding is rather fragile. Cracling type noises are usually cable related as well.

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Subwoofer is hummig what is this noise


Hum is a constant low-frequency buzz, usually at about 60 Hz or 120 Hz, which results from voltage differences between true "ground" (what you'd get shoving a copper pipe into the ground) and the electrical "ground" of your receiver's chassis When this voltage differential exists, it's called a "ground loop," and the hum it produces is darned annoying. You'll hear the hum mainly from the subwoofer because it's a low-frequency noise, you will need a ground loop insulator they are about $20 at any electronic store

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1 Answer

Behringer Truth B2031A major hum in both monitors


Could be when the power outage the speaker was blown a little. If not check the wire connections.

Sep 10, 2013 | Audio Players & Recorders

1 Answer

Where can I find the entire circuit board for TRUTH B2031A


Unfortunately Behringer equipment is hard to get parts for generically. You may be able to order the whole amp from behringer but I doubt it. I have had lots of problems repairing them for that reason and I will no longer use any of their stuff. The IC's could be repaired but can't find any record or crossover to any of their output transistors. It appears they are custom made for Behringer. Sorry, I can't help any more than that.

Mar 28, 2013 | Behringer B2031a Truth Active Monitors

1 Answer

The speakers were damaged by rates


www.soundmastersdirect.co.uk sell behringer spare parts. give them a call.

Mar 07, 2012 | Behringer Truth B2031a 225-watt Powered...

1 Answer

I have a problem with my behringer b3031a truth studio monitors.Slightly before a sound it's played (and during the playing) they make a little buzz. Ex. I turn on Windows Media Player and as long as...


The fault is not with the speakers... It is with the noisy audio system common in computers. Get a decent USB audio interface and use balanced interconnect cables to solve the problem.

Aug 02, 2011 | Behringer B3031A 2-Way Active Studio...

1 Answer

The fuse blows seconds after the unit is switched on. No fatal accident occurred to cause the problem.


One of the power amps has failed. Take unit in for servicing unless you are electronically adept.

Here is schematic:

http://elektrotanya.com/behringer_b2031.pdf/download.html

Scroll down to "get manual" and click on that to download. Ignore other download links.

The unit uses LM3886 power amp chips. Likely one has shorted. Use a 40 watt light bulb in series with the input power cord to act as a resetable fuse to avoid wasting fuses during troubleshooting and repair.

Jun 24, 2011 | Behringer Truth B2031a 225-watt Powered...

1 Answer

Just bought a pair of used Beringers Truth b2031a monitors. one of which doesnt work anymore at all... opened the back of it (took those 6 screws out) and saw that the power connection has been cut of......


Here is the service manual schematics for your speakers:

http://elektrotanya.com/behringer_b2031.pdf/download.html

Scroll doen to "get manual" and click on it to download the manual... Do not click on the other downloads at the site, they are for viewers you don't need.

Take the schematics to a COMPETENT electronic service technician to get units repaired. You obviously bought units that had been hacked before...

Jun 21, 2011 | Behringer Truth B2031a 225-watt Powered...

1 Answer

Behringer Truth B2031A powered monitor speaker - radio interference in left speaker


A well know problem to the Behringer Truth B2031A speakers is radio interference and noise. I had the same problem with mine and found a solution on a forum!

If you open the speakers, you'll see a cable from the main board that runs to the 2 lights at the front (on/limit LED's). It functions as an antenna... Disconnect it and your speakers are silent, finally. (OK no leds, but I can live with that).

Oct 24, 2010 | Audio Players & Recorders

1 Answer

Intercom/baby moniter - buzz/hum


Ok do you live within 1km of a sub station. As these produce a high emf output and can affect radio equipment in a similar way???

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