Question about Numark Industries Numark DM 1200 Mixer

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I HAVE A NUMARKKMX01 MIXER WHEN I PLUG THE RED RCA JACK IN TO THE MIXER I GET A LOUND HUM

WHEN I PLUG THE MIXER IN TO THE AMP I GRT A LOUND HUM ON THE RED SIDE OF THE RCA JACK.

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What is plugged into your Numark mixer when this happens? Try disconnecting ALL audio inputs to your mixer, turn mixer volumes to zero and see if the hum is still present. Adjust the volume and check if the hum you mentioned returns. If it is still heard, try new cables between the mixer and amp...if not then start reconnecting inputs until the hum is heard again. It's a process of elimination but not that difficult to find the source of your problem.

Posted on Nov 01, 2012

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SOURCE: Peavey 115 Low hum Low volume from input

The preamp section has a problem. It could be anything in the preamp but is OFTEN the input jack itself. They take a lot of abuse.

Also the insert jack contacts that forward the preamp to the power amp if no external FX are used can go bad.

Additional things are circuit board cracks caused by rough handling and also controls that have had the knobs mashed in which can destroy the potentiometers they are connected to.

Posted on Sep 22, 2009

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How to connect my stereo reciever to my Pyramid PR 2700 mixer


Running mixer to receiver??? does the mixer have rca (red & white) audio outputs? if so you can run it that way and hookup to whatever input you want on back of stereo. If it doesn't then you can buy a 1/8" stereo jack to rca and run out of headphone out. (will need a 1/4" headphone adapter though).

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I can't hear the sound from my PC when I'm using the mixer. Its hooked up to both the computer and the speakers, but when I'm recording in pro-tools 11 I can't hear any of my playback. I have to bounc


hello. Im not too familiar with Protools (mainly because its a headache right out of the box), but MY understanding is that Protools won't recognize a lot of external audio devices. (such as behringer)
however..if you are able to record and 'see' the audio there, just not hear it, there might still be a solution, & seeing as how i never used protools, it still might just work.
First of all:
if you're using the UCA-200 external usb box connected with rca cables, then my solution SHOULD work, as it is what i did to get mine to finally do the same thing.

#1) you will need to pick up (x2) RCA-1/4 jack adapters . (radioshack, about $2 each)
#2) insert a red and white rca cable in the RIGHT side of the Mixer's CD/Tape out .....the other end of the rca cables will go into the UCA-200 INPUT.
#3) with 2 more cables in the OUTPUTs of the UCA-200, put the rca-1/4 jack adapters on both cables, insert them back into the Mixer inputs 9/10 (in the analog 1/4 instrument inputs)
#4) adjust volumes accordingly, make sure channel 9/10 isn't muted, headphone volume is up, etc..
.......if that didn't do the trick, then you will need to go into the Audio Settings menu on your computer..(or protools) and change the default playback device to your mixer (probably named Generic USB or something similar)

I really hope this helps somewhat, because i remember going through the same thing & it took a looong time to find the correct awnser.
best of luck!

*also*

check for any updated drivers for your mixer! (I personally recommend you do a Google search for Asio4all drivers, they're pretty good)







if your awnser is A), i would suggest going into your computer's Audio Settings menu, and select the mixer as your default playback device.

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I am hooking up a Behringer xenyx 1002B Mic/Line Mixer to my Toshiba Satellite c885-S5194 laptop to broadcast online via meridix. I'm using Audio technica BPHS1 Headset Microphones with XLS plugs and 1/4...


IF your Laptop has a stereo LINE 1/8" INPUT jack, you can take the Stereo ( Left & Right ) LINE outputs on your mixer and feed into this jack on your PC. You will need a 1/4" dual plug for the mixer end to a single 1/8" stereo plug on the PC end. I suspect the problem you are having is either related to your PC only have a MIC input jack or you have something set wrong in your PC's sound config. file. More information is needed to properly solve the problem.

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2 Answers

Speaker humms only. what causes that?


Incorrect connections or volume settings.

• In powering up, mixer first then amp

• In turning off , amp first then mixer


If hum still persist, without the mixer connected

then speaker amp may need servicing.

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HOW TO WIRE GEMINI GRAPHIC EQ 3000 TO behringer djx750 proffessional MIXER


Line level output of the mixer would go into the line level inputs of the EQ, and the EQ line level outpputs to the line level inputs of the amplifier. If you are faced with a mix of unbalanced inputs or outputs, to balanced inputs or outputs it gets a little complicated because you need to matrix the balanced signal to unbalanced load and vice versa. There is no single answer to doing this either.

RCA jacks are unbalanced, 2 conductor 1/4 inch connections are unbalanced most of the time. XLR and 3 conductor 1/4 inch jacks and plugs can be either balanced or unbalanced.If either are wired so left and right are a single ring or tip on the 3 conductor 1/4 inch jack, it is unbalanced and they would share a common ground lead. XLR wired with one pin common with shield and right and left have a single conductor on the plug or jack, that is unbalanced.

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Behringer mixer Eurorack UB802 is losing partial stereo signal in one channel. When I record (audacity software) I can hear both channels but displays one channel. Is it my computer's audio jack t


Sounds like the output cable from the 802 is not correctly pinned to your input on the computer. Fred is on the right track but you may need to take it a bit further.
It may also be helpful to use a Pro USB audio interface such as the Digigram UAX220v2 (line level version).
If you wish to use the computer's on board sound card consider an IHF/Pro interface that converts balanced audio to unbalanced , and the proper cables. Two 3-wire balanced 1/4-inch from the 802 to the left and right inputs of the interface (XLR Male), then RCA (Red and White) to a 1/8-inch TRS Plug cable onto the the computers audio input.
Henry Engineering's Matchbox HD comes to mind.
Good Luck.

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How to connect mixer to a crown power base 2 amp and speakers


just use the main left and right outputs of the behringer to run xlr (3 prong balanced) to 1/4 inch (looks like a big headphone plug) cables into the inputs of the crown amp. the mixer has the xlr outputs and the amp has 1/4 inch inputrs, sop the cables will have to reflect that on both ends. run the outputs of the amp (rca outputs, i believe, you may have to get a rca plug to 1/4 inch jack adapter, and then use a 1/4 inch speaker cable) to the inputs of the speakers, again, the amp has rca outputs and the speakers will likely have 1/4 inputs, so you will have to address that wil an adapter. have each speaker in its own channel.

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1 Answer

Computer does not recognize it and the mic does not record into the computer... maybe my connections are wrong..pls help me


I have a 1222FX and here is how I have it hooked up. I have a cord that has an 1/8" stereo plug on one end and two mono RCA jacks on the other. The 1/8" end goes into my line in on my sound card. (not the microphone in ). The RCA jacks are hooked to two cords that I made up that have a RCA plug on one end and a XLR plug on the other. The XLR plugs are wired so that they are unbalanced. Pin one is ground and pins two and three are soldered to the positive. I used shielded cable and the shield is soldered to negative on the RCA jack but left unconnected on the XLR jack. This prevents hum. You may be able to purchase premade cables but I made my own. The XLR jacks are plugged into the left and right balanced or unbalanced Main output jacks of the mixer. On your computer click Start then Control Panel. Click Sounds and Audio Devices. Make sure that Place Volume in Taskbar is checked. Place the volume slider in about halfway position if there is one. Click Advanced and a control panel should pop up. It will say Play Control at the top. You will want your speaker volume about half way also. Make sure line in is NOT muted (checked ) and is also about half way up. Plug headphones into the mixer and get a good sound with the microphone you are using. If it is a microphone that requires phantom power make sure you turn the power to the mixing board on first, then the phantom power. Do this with the main volume control all the way off. When the mixer has warmed up for a minute or so you can bring the volume up to get a good sound. When you are done recording, make sure you slide the volume down again. Then turn the phantom power switch off and then the main power. This procedure protects your equipment. On the Play Control volume panel on your computer click on Options then Properties. You will see that it is checked for Playback. Check it for recording. Make sure that where it says Show the following volume controls, it has Playback volume and at least Line In checked. Now check the Recording Controls. Where it says Show the following volume controls make sure that at least Line In is checked. Click on O.K. and your Recording Control window will pop up. Make sure that Line In select has a check mark. Slide the volume up until you get a good sound through your computer speakers or your headphones if you have them plugged into the computer. If you accidentally close this window, Click on the speaker symbol in your taskbar at the bottom. You will have to switch between Play Control and Recording Control as before. You didn't mention what software you are using so I advise you to read your manuals carefully. The manual for the mixer has a page with wiring diagrams for cables. Here is a link to a site with lots of good info and an invaluable FREE book that you can download:http://www.recordingreview.com/ I hope this helps.

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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.

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Have a look at the Behringer UCA202. Its a Usb port that should help you do what you want.

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