Increases the acoustic rear volume of the Klipsch Heresy cabinet, and adds a vented port to increase the low frequency response of the speaker. The mod is completely reversible by attaching to the mounting holes of the original rear panel.

The RAAD (Remote Acoustical Analysis Device) measures the acoustic response of a room, and is intended to be a portable device that could be shipped to prospective customers.

The Amp Selector Switchbox allows a user to connect two amplifiers to a single pair of speakers. A special feature of this unit is the built-in load resistors that present a speaker load to the unselected amplifier.