Pioneer late innovation for 2 channel stereo amplifier with phono stage. Taking into account development in technology Pioneer went to develop good old school 2 channel stereo amp for music, "crash boom bang sound" is for multichannel cinema, and did not go digital amp design= mainly for low cost and plenty of unclean, undefined power for multichannel cinema amps but old school more expensive transistors design.
The result is the direct energy MOS=an audio amplifier technology created by Pioneer that uses Metal-Oxide-Semiconductor Field-Effect Transistors (MOSFETs) to deliver clean, efficient sound. A small amplifier with specially developed Mosfets on the output with direct drive short path circuitry.
MOSFET Output Stages: Uses specialized transistors that respond quickly and handle heat well, resulting in low distortion and clear audio.
Brilliant!!! The amp delivers clear undistorted powerful music with full dynamics especially on sensitive speakers >90dB. If my old Denon 90X2 RMS could hear how this baby:rated 1/3 its power, drives the same Titrix Horn loaded Klipch speakers he would go vallistics
For the time he sits quiet with its mates on the HiFi stack and his boss goes vallistics shouting U-GAMOOTOO!!! enthousiastic.