THE R880 IS a two audio input, four audio output reverb unit with input A feeding outputs 1 and 2, and input B feeding outputs 3 and 4. Inputs and outputs appear as four different types of connectors, namely balanced cannon, unbalanced jack, coaxial digital (SPdif) and Roland's proprietary optical digital. The front panel has 12-segment input level LEDs for each channel, applicable only to analogue inputs, and channel 1-4 output metering of a similar nature. A MIDI channel selector and display, and analogue input rotary are the only other front-panel controls. The rear panel houses the connectors, MIDI sockets (in/out), RRC DIN sockets (for connection to the GC8 remote control unit and daisy-chaining to other R880s) and a unigain switch for level matching (-20/+4 dBm)