Picture shows power supply impedance commutation artefacts (even harmonics) spectrum generated on a +/-14,100uF GB150S power supply in response to a 100W rms IKHz sinewave Class AB output. This spray of even harmonics is generated by every note resulting in a miasma of high frequency artefacts on the supplies that can blur detail and defocus imaging if not isolated from the amplifier output.

A very high designed in power supply rejection in the GB150D amplifier topology, particularly at high frequencies and a good PCB layout and wiring ensures this supply borne hash doesn't enter the amplifier module and intrude on sound quality - enabling Class A performance from low bias Class AB efficiency.