Line level speaker switch

I built this speaker switch for Soapbox Music to allow a listener to quickly switch between different speakers. No studio monitors are perfect, and everyone listens to music on different systems, which can make it hard to know if a mix is balanced correctly. I find it very helpful to be able to quickly switch between various speaker systems to compare how things sound.

This box is a passive line level switch utilizing a 5 position, 6 pole rotary switch. It takes two balanced signal inputs and allows you to switch between 5 different outputs. Before we upgraded to an SM Pro Audio Passive-1, we had it setup at the studio with a Blue Sky 2.1 system, Adam A5s, and a FM transmitter to allow playback on a nearby radio. Spray lacquer finish on a wooden enclosure.