Every component can benefit from cleaner electric power, but digital components seem to benefit the most. It's interesting to note that power conditioners did not become popular until digital components were widely used. I suspect digital components are the major internal causes of electrical noise in home systems.
At one time I used an API Power Wedge and I was never truly certain if it was limiting the sound of the power amps (Rowland Model 1 or Pass Aleph 5). Regardless, I plugged them into the API because I perceived the surge protection as more important than the small, if any, detrimental sonic impact. I currently use a PS600 and I can detect no negative effect on amplifier performance. I am passively bi-amping my speakers and I plug both a JRDG Concentra integrated and a Model 112 power amp into the PS600. With no music the system shows 190 watts on the PS600's display. Loud music (up to low 90dBs) only raises the display to 240-260. I've never tripped the PS600's overload circuit. My speakers are 4 ohm designs with 89dB sensitivity.
At one time I used an API Power Wedge and I was never truly certain if it was limiting the sound of the power amps (Rowland Model 1 or Pass Aleph 5). Regardless, I plugged them into the API because I perceived the surge protection as more important than the small, if any, detrimental sonic impact. I currently use a PS600 and I can detect no negative effect on amplifier performance. I am passively bi-amping my speakers and I plug both a JRDG Concentra integrated and a Model 112 power amp into the PS600. With no music the system shows 190 watts on the PS600's display. Loud music (up to low 90dBs) only raises the display to 240-260. I've never tripped the PS600's overload circuit. My speakers are 4 ohm designs with 89dB sensitivity.