Check the listing for details. Monoprice Dual-Source 2-Channel A/B Speaker Selector with Volume Control and. Color: Black, Condition: New. Listed at 79.99 USD. Spread Your Music Everywhere. One of the most popular trends in Home Audio is whole house audio distribution. Unfortunately, true multi-zone distribution systems are normally built into only the higher end receivers or require an expensive audio distribution network. Monoprice brings everything within reach of the average homeowner by offering a wide selection of Home Audio Distribution accessories. A Key element of any home audio distribution system is a speaker selector. The speaker selector allows you to distribute your source signals to several sets of speakers distributed throughout your home. Additionally, a good speaker selector like our 2-channel A/B selector listed here, will allow you to have different source audio sent to different rooms so that someone in one room can be.