Wooohoooo … DON’T plug in to the mic inputs. Bad, bad plan. The signal on those XLR’s goes through the mic preamps. The inputs are geared to take VERY low level inputs. Your master out signal is very HOT (high level). So you run the chance of redlinining the mic inputs on the mixer, even with the gain turned all the way down. The other reason is that mic preamps will give some sound coloration usually, but that shouldn’t be your biggest worry.
Tip for next time: write down the brand and model of the mixer they have and mention it in your post. Easier to research for me/us and give you an adequate answer.
Now back to the situation at hand. If your gear is set up really close to the clubmixer, say less than 1,5 meter, you can just use a high-quality (so not the cable that came with your home stereo set :)) RCA-RCA cable. With the signal being so hot, you are not very likely to get interference (noise). If you make sure your power cord goes into the same group of power outlets that the club mixer is on, there is a more than fair chance that you won’t get ground hum either.
Obviously there are no guarantees. So, what alternatives do we have? You already said in your other post that your controller has TSR (balanced) outputs. The mixer has unbalanced inputs apparently (not counting the mic inputs). If you have to go greater distances or through “poluted” environments, like passed lighting systems dimmer packs (yippy!), and want to prevent as much problems as possible, this is a possible solution:
http://www.parts-express.com/pe/showdetl.cfm?partnumber=245-868
Well, maybe THE solution. It allows you to take your balanced TRS signal (use the TRS/XLR converter I mentioned earlier), run a long cable to this box (XLR in) which you stick right next to the mixer and then use a very short (still high quality) RCA (out) cable into the mixer. You should be good to go.
No hum, no noise and as a bonus this unit changes the output levels as they should be. Pro audio equipment runs +4dB signals (probably what your controller puts out on it’s TRS) while RCA inputs (usually) are rigged for -10dB. If you were to use an XLR to RCA converter (they do exist) on your cable and then plug into the mixer, you’d come in 14dB too loud for the input. Not as bad as with the mic input, but it would mean a bigger risk of overloading the input. This unit makes sure you get the output level you need. Also that kind of connection would be unbalanced by definition.
Hope that helps again.
Greetinx,
C.
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