With over 1,000 units in the field the LS3 is our most versatile selector for balanced audio routing. The LS3 provides passive switching of three stereo outputs from a single stereo source. Or as a source selector any of three stereo sources to a single stereo output. As a speaker selector, you can select multiple outputs simultaneously. An excellent tool for isolating your subwoofer or using it with multiple pairs of speakers. All inputs and outputs are on 1/4" TRS jacks.