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The Radial Engineering Mix 2:1 is a passive mixer that sums two audio signals to a single mono output. It provides individual input knobs to balance the two signals, should one be louder than the other, as well as a polarity switch on input 2, should one of the signals be out of phase. The unit accepts balanced 1/4" and XLR inputs, outputting to a single XLR output.
Each input can be switched on or off. This allows you to audition either signal before you make the choice to sum them together. Both level controls can be bypassed at any time thanks to a switch on the front panel. Should you hear any hum or buzz caused by ground loops, a ground lift switch has been provided to mitigate the issue. The Mix 2:1 is entirely passive, requiring no power to run, and features a military-grade PCB board protected against RF interference, as well as a durable 14-gauge steel chassis.