Detent volume controls Ground lift switch 2 dual speed fans for cooling Noise-free on-off Independent DC and thermal overload protection on each channel Short circuit and speaker protection DC servo operation 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 Built-in DC offset 1900 Watts Binding post (banana plug) outputs Built-in digital current limiter