2x4 "hack" to get mono XLR balanced outputs - diyAudio
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Old 12th January 2014, 11:56 PM   #1
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Default 2x4 "hack" to get mono XLR balanced outputs

I am using a MiniDSP 2x4 to be a low pass to a mono subwoofer. I was using a pair of L,R outputs (outputs 1 and 3, if it matters) and a Y-connector, then an RCA-XLR (mono) into channel A of a Behringer NU3000 (bridged). It worked, but I had a hum issue (not the MiniDSP's fault--even when it is out of circuit.) I made a DIY cable that takes the "hot" signals from the L & R (unbalanced) outs and puts them on the Neutral and Hot pins of the XLR (and ground to ground too). This seems to work as expected, but I need to invert the output of one of the channels. The noise is gone and I should have a hotter signal to the NU3000 also (something else I needed.)

By extension, add another obscure use to the MiniDSP: you can take unbalanced RCA inputs and make true XLR balanced outputs!
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