This is model 1177A that replaces model 1177. Model 1177A is new with surface-mount components and a metal-chassis for superior EMI shielding.

New Digital Audio AutoSelector. Need more digital audio inputs? The 1177A by Audio Authority allows the output of 4 sources to be connected to the input of a home theater receiver and/or TV. Unit automatically detects active audio input and routes it out to your A/V receiver. You may also select inputs by priority if more than one is acitve or manually select the input. Accepts both four optical (TosLink� ) and four coax (RCA jack) signals. Both signals are automatically converted to provide both types of outputs to the sound system, eliminating compatibility problems between products with differing digital connections.