Question about Pioneer DJm 400 Professional DJ Mixer

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I have a djm 400 and it has started producing a buzzing sound through the speakers. I can take the same speaker cables from the djm 400 and hook them up to my backup mixer and the buzzing goes away. What could be wrong with my djm 400

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alan313

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I am after pushing 220 volts into my DJM 400 mixer when it can only take 120 and obviously now, Its not working! What do I do?

Posted on Oct 22, 2012

  • Fred Yearian Oct 26, 2012

    If you are very lucky, the only thing blown is a 250ma fuse at the input power. The power transformer would saturate at 220 and draw excessive current and blow the fuse. Downstream regulators SHOULD have protected all the other circuitry.

  • Fred Yearian Oct 26, 2012

    The fuse I believe is internal and you will have to open the unit to access it. It is likely a GMA small type.

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Since it works with your other mixer, the DJM400 is probably fine. You have a ground loop.

Make sure ALL, and I do mean ALL... (re-read that if there is any confusion) interconnected equipment WILL BE powered from the same receptacle or source. If speakers or amps are powered from one place and the DJM is from the other end of the room you likely have a ground loop and you can ex[ect buzzing. Run extension cords alongside the audio leads if necessaryy to carry power from where the amps or speakers are plugged in back to the DJM400 and ANY pther connected equipment.

Posted on Jan 07, 2011

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Ben Armstrong

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SOURCE: I have a djm 400

Does it buzz through cans? (headphones). Try listening on headphones (turn off any amps and speakers) on cue to each channel you use and to the master output. is it stil there? if so it's an all round earthing fault. If it's all good through the cans (sorry...I mean headphones), try it with the amp/s on again. If the buzz is back it souds like the screen on the main audio output connecters has come off inside.
It's a quick fix, but if you have never used a solder iron, take to someone who has.

Posted on Jan 07, 2011

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1 Answer

I have a djm 400 and it has started producing a buzzing sound through the speakers. I can take the same speaker cables from the djm 400 and hook them up to my backup mixer and the buzzing goes away. What...


Does it buzz through cans? (headphones). Try listening on headphones (turn off any amps and speakers) on cue to each channel you use and to the master output. is it stil there? if so it's an all round earthing fault. If it's all good through the cans (sorry...I mean headphones), try it with the amp/s on again. If the buzz is back it souds like the screen on the main audio output connecters has come off inside.
It's a quick fix, but if you have never used a solder iron, take to someone who has.

Jan 07, 2011 | Pioneer DJm 400 Professional DJ Mixer

1 Answer

I have a pioneer djm mixer 400,I hooked it up to 2cdj mk1002. I want to run them through my pioneer reciever.which is a vsx 1020.im having a problem.IT works okay,if i run the cd player directly to cd...


If your CD player works hooked up to the DJ board, then try hooking the line out of the board into a auxiliary in or line in in or record in on your receiver using the appropriate cables.Try the CD in first and if there is too much signal then use the CD/Tape in. You need to match the output signal of your board to the input signal of your amp. Hope this helps.

Oct 22, 2010 | Pioneer DJm 400 Professional DJ Mixer

2 Answers

I have a djm 400and a pair of active behringer speakers model b2031a an im gettin no output from then what am i doin wrong the leads are male to female in the back of the speakers an obviosly like a phone...


First, we need to get the terminology correct.

The DJM has "PHONO" (RCA) jacks, not "phone jacks" of which the current usage is normally the 1/4 inch diameter.

You would be going INTO the Berhinger 1/4 inch jacks on the back of the speakers since you are not using the three pin XLR connections that are used for balanced lines which the DJM does NOT have.

So you should have RCA plugs to 1/4 inch plug cables. The inputs on the 1/4 inch will take TRS connections. IT IS possible you may need to use an RCA to TRS cable with the signal on the "ring" rather than the "tip" of the connector.

A test of the speakers is to touch the tip of the RCA plug with the speaker on and you should hear a hum.

PLEASE be aware that these speakers are INTENDED for use as studio monitors by the sound man in the booth and NOT for playing loud at a venue for dancers, etc.

Dec 16, 2009 | Pioneer Music

1 Answer

Buzzing sound coming from the speaker at certain frequencies. more so when the bass is cranked. do i have to replace the speaker? or could it just be loose??


That is happening because your grounds went bad. Without grounds, then the amp will produce a buzzing sound. I would replace the input wire, that is probably the problem

Oct 11, 2009 | Fishman Loudbox 100

2 Answers

How to connect my qqualizer to my djm pioneer 400 mixer


Use the stereo master outs from the DJM into the A and B Inputs of the EQ (you'll need 2 phono to Jack or 2 phono to XLR cables) then from the A and B Outputs of the EQ to the power amp/ speakers, etc (you'll need jack or XLR cables depending on what is powereing your speakers)

May 27, 2009 | Pioneer DJm 400 Professional DJ Mixer

1 Answer

One Output low on DJM 400


This may not be the correct solution, but have you checked the switches on the back of the DJM-400 to see if one output is set to "PHONO" mode?

Apr 17, 2009 | Pioneer DJm 400 Professional DJ Mixer

1 Answer

No Volume oe sound coming out of speakers


try connecting speakers to another sound source or if you have access to a ohm meter, check impedance of speakers, should measure 4~8 ohms.

Jan 25, 2009 | Behringer Pmp3000 16 Channel Audio Mixer

1 Answer

Pioneer DJM-400 mixer turns on, but channels aren't working


could be a few things , what have you tried to trouble shoot the problem ?
My steps would be ;
check all leads (even if you KNOW u pluged them in)
check the gain is set corectly .
check the line phono slectors are set to what ever you have you leads pluged into on the back of the mixer ( there is 4 red and white RCA plugs , 2 for phono,2 for line CDJs shold be using line )
if you are using digital cables to conect your CDJs , on the back on the mixer there is a small switch marked "CD or digital" make sure that is sleceted "digital " . if ur not using digital cables make sure it is on "CD" .
the info iv put here is based on the DJM-800 so your mixer my not have some of these featers as iv never used a 400 . hope this helps dued . check out www.djtutor.com for more tricks and tips . Pratices'N'enjoy !

Dec 28, 2008 | Pioneer DJm 400 Professional DJ Mixer

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