Whirlwind IMP COMBINER Passive Two-To-One Mic Line Combiner

The IMP COMBINER merges two microphone lines into a single output so you can free up a console channel. It is built around the TRSP-2 transformer, and connections are two female XLRs in and one male XLR out.

The polarity reverse switch on input 2 is the reason to reach for this box rather than a Y cable: put a pair of mics above and below a snare, or in front of and behind an open backed guitar cabinet, flip one of them, and the two arrive at the console in agreement instead of cancelling.

Type	Passive two-to-one mic line combiner
Transformer	Whirlwind TRSP-2
Input impedance	150 ohms x 2
Output impedance	150 ohms
Operating level	-50 dBu to -10 dBu
Frequency response	20 Hz - 20 kHz, +/-1 dB
Connections	Two female XLR in, one male XLR out
Polarity reverse	Switchable on input 2