Partyline: How to build an Analog PL channel A/B toggle switch (WP-2)
We recommend a Clear-Com WP-2 for this sort of thing. It’s notjust a passive switch, but remember that the only difference between Channel Aand B is the audio on pin 3 (pin1=common, pin2=30vDC, pin3-= channel audio+).Attached is the wiring scheme for our WP-2 switched wallplate as well of a picture of an unwired WP-2, so you can see the cap that werecommend between pin 1 and the XLR casing.