Behringer Ultrabass Bxl450 45w 1x10" Bass Combo Logo

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Taylor Smith Posted on Apr 12, 2012

Direct out kills speaker signal on my behringer bx1200

My behringer bx1200 bass amp was working fine, then one day when i tried to use the XLR direct out, i discovered it disconnected the signal to the speaker. the XLR and speaker work ok separately, but now dont work together. anyone have any ideas/suggestions?? thanks for your help

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  • Posted on Apr 14, 2012
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If it's still under warranty, get it replaced. Otherwise, take to an authorized behringer repair shop, or your local pro-audio repair shop.

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Michial Gueffroy

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  • Posted on Apr 25, 2009

SOURCE: behringer djx700 pro 5 channel mixer

When you said radio I am thinking you mean receiver when you say stereo. Have you tried using your CD into the input that you are plugging your mixer into? If you get both sides , right and left of your CD then it is a problem with the signal from the mixer and we can work from there.

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Anonymous

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  • Posted on Mar 24, 2010

SOURCE: Iam trying to make my behringerXENYX 1204fx mixer, / connect

I have trouble my new behringer xenyx 1204FX VU led dead , like new VU it must play , how to repair this unit VU light

Fred Yearian

  • 5603 Answers
  • Posted on Apr 24, 2010

SOURCE: Can I hook up 2 separate power amps to PMP3000? I

Better way... Connect the main speakers via the Speakons and then put a Power Subwoofer to one of the Monitor connections IF you are not using both stage monitors. If you need to kill the lows to the mains, use the EQ in the PMP-3000.

Use the EQ that is USUALLY on the subwoofer to kill the highs to the sub.

Lot less cables and hardware.

REMEMBER for equipment safety, power ALL interconnected equipment from the same source be it a receptacle or power distribution system.

Powering parts of a system from receptacles strewn around a room is asking for trouble of ground loops and ground faults.

Fred Yearian

  • 5603 Answers
  • Posted on Sep 22, 2010

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.

Fred Yearian

  • 5603 Answers
  • Posted on Oct 29, 2010

SOURCE: I just got a new Behringer BXL3000 bass amp and it

Common problem is to be using the wrong one of the two input jacks... one has higher gain. Also make sure both gain controls are turned up some.

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You should be able to unplug a mic from the xlr input with the unit on with no problem.
I beleive the problem is that the xlr input jack has one or more legs broken off the board. If you dsassemble the board and resolder the three legs to the board you'll probably fix the problem.
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Hi folks...I have a Behringer HA 400 Micro Amp. My question is: as I am a bass player/guitarist. Can I put my bass or guitar through this device. I understand that it will accommodate 1 instrument at a...

You can put just about any instrument through any amp. The difference in sound will be whether or not that amp was designed for the particular frequencies of that instrument. Also whether or not the speakers you are using are designed for those frequencies. When playing bass you need speakers designed to carry low frequencies (40 - 400 hz); mid-ranges and tweeters don't cut it. Set your instrument volume on the guitar at 70 - 90 % to get the most signal from the instrument. Set output volume on the amp at 50 - 70 %, then adjust gain on the amp to get required sound level. You're not likely to blow the amp, but you could blow the speakers if the amp delivers more power than the speakers can handle. With a micro amp check the output rating. It's possible you may not have enough power to get the sound you want and as you turn up the gain the sound will distort.
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My 200hd head is not putting out the full 200 watts i have a behringer 8x10 cab and before this head used to power this cab fine now even with the volume cranked you cant even feel the bass i have...

I am not sure how you are measuring the power output to verify it is less than 200 watts. With a true RMS voltmeter you should see 28.28 volts RMS across a net speaker load of 4 ohms. If you use only one 8 ohm speaker, you will get 120 watts. If you are getting the 28 volts there is nothing wrong with the amp. You MAY have blown the speakers OR not generating much bass due to processing in an EQ. I assume you are using at least 15 inch speakers if you want to feel bass. Look up your speakers specs... you will need speakers capable of 32 Hz to feel much. With this amp your speakers should have aa total rating not less than 400 to 600 peak watts or around 300 watts RMS continuous power rating. Using a lot of high end EQ will keep the amp busy at the high end and reduce the power available at the bass end.
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There are USUALLY 4 screws in dress washers on the top... AND hidden are two for the handle that also grab the amp. Sometimes there are caps over the ends of the handle thaat have to be snapped off... they can be a pain to get off. I believe the amp portion slides out the back... Thhere is twwo wires under the amp that go through a hole to go to the speaker... be careful they are short and they MAY have a ferrite donut around them... It is usually a fight to get them free and even worse when reassemblling to get them back on... AND they put hot melt glue on the connector in the amp... You have to carefully release that...I have a BX1200 and have had it apart once for repair... Input shorted? You mean the input power or the input audio jack... if the latter, let me guess... somebody tripped over the guitar cable... happens all the time... that is why we loop the cable through the handle to avoid breaking the inout connectors.
I am not sure how you analyzed the input audio connector is shorted... these jacks are JUNK and easily broken. If the input POWER is shorted, or appears to be shorted, it may be deeper than the power supply... USUALLY one of the amp chips is shorted.

Here is the service manual for the BX1200 which should be similar... they may have paralleled another LM3886 to get the 180 watts.

http://elektrotanya.com/behringer_bx1200_sch.zip/download.html

Scroll down to the "Get Manual" link and click on it to download.
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It seems I've got a loose contact at the input socket, how do take the amp out so i can open it up and fix the connection?

For some reason that model number doesn't appear to be valid.

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GO ONLINE AND CHECK BEHRINGER EUROPOWER EXP3000 STEREO POWER AMP. YOU MAY GET SOME HELP THERE.
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Here is a SM for the BX1200... it is LIKELY similar to the BX1800... they don't re-engineer very much.

http://elektrotanya.com/behringer_bx1200_sch.zip/download.html

The 1200 uses a pair of LM3886's in parallel the BX1800 MAY use the same amp. You will find a LOT of commonality among the amps in the same series.

You sometimes find TDA 7293 and TDA 7294 in this audio equipment.
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Behinger normally doesn't give schematics... However here is a link to a BX1200 schematic at a foreign site. OFTEN they use the same circuitry within a series of equipment.

http://elektrotanya.com/behringer_bx1200_sch.zip/download.html

Note it is a zipped file of both F and H revisions.

Please note that the symptoms you describe are NOT usually something you will find in the preamp, but rather in the interconnections. It appears that the BX1200 uses TRS inputs at the jacks... not sure what your BX4500 does...

Make sure ALL your interconnected equipment is powered from the SAME receptacle to avoid ground loops and hum. Use balanced lines everywhere possible.
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The first thing to do is to swap teh L & R INPUTS to the amplifier. Did the speaker that works change?
If som the problem is with the setting of the mixer deck. If it did not change, then the problem is with your speaker wiring of the dead speaker, the speaker itself, or that side of the amp.
If the working speaker did swap, that means problem is with the mixer. The question then becomes how are you connecting to the mixer. You should be using TRS 1/4 inch connectors or preferably XLR from the MAIN outputs. These are balanced outputs connections.
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There are so many possibilities that I can't evaluate them until you try the test to find if it is problem of the amp or the mixer that I have given you to try.
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