Six individual IR inputs allow independent zone control of the six built-in audio/video preamps, each zone section contains its own A/ V preamp, each common source can be IR controlled, capability to link with EXP9 expansion module for up to 15 zones total, can be mounted four ways: between wall studs, on top of wall studs using a separate flat panel, racked into a standard 19-inch rack using optional rack-mount plate, or freestanding; input level for each source can be adjusted with the RC68 remote/programmer, 7"H x 14"W x 2.5"D.