It’s one of the most complete and refined stereo amplifiers with regards to signal handling: its crossover section has independent hi-pass/lo-pass filters. You can adjust Q factor in the hi-pass section while lo-pass filter can be configured in stereo (12 dB/Oct) or mono (24 dB/Oct). Crossover can be completely bypassed in oder to use SRx 2S as a standard stereo amplifier. There are front and sub inputs, both pre-in and "speakers-in". There is also a bypass pre output with hi-pass/lo-pass/bypass switch.