Question about Behringer B212D Powered Speaker (550 Watts, 1x12 in.)

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I don't have any sound from it.Accidently unplugged the 1/4in jack. it made a pop. Something needs repair.

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  • 16 Answers

Diodes probably fried. You made contact with the tip to ground. $3 or $4 part, but you probably fried more than one. $100 to $175 in labor for them to fully diagnose the problem.

Posted on Jul 11, 2013

  • JamOnit Robinson Nov 12, 2013

    Mario Aguilar, electronic tech in Miami. Part of SFDJA (So Fla DJ Association) repairs any and all equipment for half price to all SFDJA members. Connect with him on Facebook.

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2 Answers

Low volume on my marshall


I am very new here and don't know how to answer a question to a specific problem so I will write about the most common problems that I have had over the decades doing guitar amp repairs. If you find that your amp is extremely low in volume and then suddenly comes back to normal- check out the effects return [or power amp in] jack. Especially in Marshall amps-these corrode and your signal dies. If there is loud noise such as hissing and crackling with no guitar patch cord in the input jack- the input jack is likely at fault. They normally have switching contacts that ground part of the input circuit when the 1/4 inch male plug is disconnected. When this in is corroded or too weak to make normal contact, you can get these symptoms. If your amp is a solid state Marshall or Fender and there is a random buzzing sound with no guitar signal connected- hit the side of the amp and listen for the buzz to go away or become louder-if it does, this usually means that the connections are loose at the two large filter capacitors. In one or more Marshall amps, they use a filter circuit in the low voltage power supple for the preamp tubes. If you encounter a dead Marshall[the model escapes me now] remove the circuit board and resolder the four connections at the bottom of the bridge rectifier. If you have any other amplifier repair questions you can email me direct at computerlen@hotmail.com.

Nov 14, 2011 | Marshall Mg100dfx 100-Watt Combo Guitar...

1 Answer

No sound. Screen face lights don't light up. All tubes glow when powered on. The speaker pops when coming out of standy-by into full on state. But absolutely no guitar sound, no auxiliary input sound, ...


If it is within warranty take it back to the shop. If not then its going to need an engineer to look at it. Its not worth fooling around inside a tube amp as the capacitors can retain lethal voltages even when unplugged.

Sep 16, 2011 | Peavey Vypyr Tube 60 Amp Combo

1 Answer

Marshall mg100hdfx head. I get no sound whatsoever plugged into the guitar input but the controls seem to work as I can hear changes in the light ambient static. I will get sound however if I plug directly...


You MAY have a broken input jack. If you can hear changes from the overdrive gain control, that control is just one stage away from the input jack. Also there is a capacitor C60 that is for RF bypassing and if that shorts that will kill the audio. Yes, inout jacks get destroyed by tripping over guitar cables... that is why you run the cord through the amp handle before plugging it in. Of course verify your guitar and cable is good using another amp.

Aug 30, 2011 | Music

1 Answer

My amp will turn on and even when I have the guitar and amp connected no sound comes from the amp. I don't know what to try to fix it, so I have left it alone, testing it every once in a while (it...


Possibly a loose connection, or bad solder connection. unplug it from power.

If you think you are up to it geta soldering iron and some solder, and a screwdriver, and take the amp part out. be careful of the speaker wires. put some tape on each one and label them so you know where to put them back. after you got it out you might have to take some more screws out to get the board off of the chasis, so you can see under it. this is where all the components are soldered to the board. maybe use a magnifying glass. touch up anything that looks questionable.
do all over. you don't need to know what everything does if you just go all over. careful not to cause any shorts. you might see something that obviously needs to be fixed. you have found a problem. you can't fix something if you don't find a problem. do all over anyway if you think you still have to.

Put it back well enough to test it. then put it all the way back together, or continue to look for a problem, or take it to someone, like me!


Good luck





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Aug 23, 2011 | Marshall MG15DFX 15 Watt Compact 2...

1 Answer

Just bought a Harbinger HX121M 2" Monitor, from Musicians Friend it did not come with a booklet on how to wire into my sound system it has two 1/4" jacks and a strange round plug about the size...


If you don't know how to connect this... well we don't either because you did not tell us what your sound system is. The larger plug is what is known as a "Speakon" connector and is a fairly reliable speaker connection that is used now. For your use you will PROBABLY use either of the 1/4 inch jacks with a cable from the amp that will drive the monitor(s). If you have multiple monitors you will daisy chain them using the 1/4 inch jacks and SPEAKER rated cables creating a string of speakers with input going into one and an output from the same one to the next speaker and so on...USUALLY you will be limited to two speakers per amp output...

Aug 15, 2011 | Harbinger HX121M 12" Stage Monitor

1 Answer

I Just bought a brand new Fender Hot Rod Deville 2x12. I get no sound when i turn it on. I can hear the hum of the speaker, everything lite up, including the two 6L6 tubes. When i plug into the jack, i...


If it is new then something is a bit strange to say the least. Turn all the knobs to midpoint. If it is going to click/pop then you will definitely hear it. Switch to standby, then power to on for a minute then standby to on. You should then see the 6l6 and the 3x 12AX7's all glowing. Plug into each channel. Don;t use a pedal to try any of this. If you get a pop on on ch then it can be one side of the preamp either a tube or one of the op amps on the board.

Make sure you try out the cable/guitar on a different amp to make sure it is working. Could be a cable or plug that is the problem.

Honestly if this is new I'd haul it back to the store and return it. It should just work with no hassles. Once you know your guitar/cable is not the cause then I would take it back and get them to either set it up or replace it. Something is just not right here for a brand new amp.

Jul 26, 2011 | Fender Hot Rod Deluxe Guitar Combo...

1 Answer

Bought amp 1 year ago, three months ago, no sound, Guitar Center said call an authorized repair shop. I did'n't open it up to check fuse because i didn't want to void the warranty. The shop replaced the...


Possible that the output tubes that were replaced are drawing too much current, hence the popping sound (may be "motorboating", one common word to describe a similar sound)

This means the tubes need to be biased properly. You need to get it to someone who knows what they are doing, ie a good amp tech, not GC. The voltages here are dangerous.

Feb 25, 2011 | Marshall JVM410C 100 Watts Valve Guitar...

2 Answers

My warlock makes this horrible noise as i plug in the cord. I don' have ANY idea why. I've been messing around with it and still nothing has worked out. It makes the sound as if my amp is turned all the...


If the noise is a pop or click, that's normal. Any other sound could be caused by too long a cord, which will produce noise while on the floor.

If it's not the cord, then you most likely have something wrong with the wiring inside the guitar. Have a luthier (guitar builder and technician) look at it, and s/he should be able to fix the problem.


Hope that helps!

Nov 21, 2010 | B.C. Rich Nt Warlock Electric Guitar

1 Answer

Line 6 spider 210 volume problem


The bypass switch in the headphone jack is likely broken. NEVER unplug the headphones while the amp is on.

There are certain small amps that have a possibilty of popping the power amp due to a feedback arrangement. Likewise, never use the headphone jack for ANYTHING other than headphones.

Dec 20, 2009 | Music

2 Answers

PEAVEY ECOUSTIC 112 W/ NO SOUND ----muted?


then i'm afraid that your main board has a glitch that you can't repair. take it to a music shop they have the neccessary parts to repair this problem and they have the schematics that will show them which chip is faulty. i'm not sure how long you have had this amp but over time the heat causes the chips or tubes to fail. that is the best answer i can give you at this time anything else would just be a gues and a waste of time. good luck

Aug 31, 2008 | Music

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