Product info:

connect up to 8 pairs of 8-ohm speakers to a single stereo amplifier (requires 1 volume control per speaker pair)

recommended for use with Niles speaker connecting block

adjustable impedance magnification (2x, 4x, and 8x)

power handling: 100 watts per channel

12 step control, 48dB maximum attenuation

pop-free switching between all steps

removable screwless connectors accommodate up to 14-gauge wire

Decora-style wall plate and snap-on color insert