Features Switch between a mixture of active and passive speakers and subwoofers Connect optional display LEDs Cascade up to 4 units and control them all via one remote control Description Product Description The unit compares different active and passive speakers and subwoofers at the push of a button. One unit allows you to switch between 10 pairs of speakers and 4 subwoofers. The units can be cascaded to allow you to switch between up to 40 pairs of speakers and 16 subwoofers! Active and passive speakers can be mixed on one unit. The remote control offers a switchable low pass filter for the subwoofers as well as dim and mute functions. All outputs are galvanic ally isolated and balanced. Each output level can be adjusted by ± 12 db. In addition the unit provides connectors on the rear for optional display LEDs which can be placed on top of or next to the speakers to indicate which one is selected. All inputs and outputs are equipped with XLR connectors, the passive speaker outputs with Speak on connectors.