Detent volume controls Binding post (banana plug) outputs Ground lift switch 2 dual speed fans for cooling Built-in DC offset Short circuit and speaker protection DC servo operation Built-in digital current limiter Power ON, Clip, Signal, and Protect LED indicators for each channel Stereo (dual channel), parallel-input, or bridged mono operating modes with selector switch Road-worthy, rugged double rack space (2U) housing Parallel balanced XLR and 1/4 TRS inputs ~115(60Hz)/~230V(50Hz) AC select switch and IEC power cord connector Independent DC and thermal overload protection on each channel 850 Watts Noise-free on-off