Explain what is a clean power amplifier?

In just 5 second google search anybody can educate itself....

« The room response is far more critical than the speaker response.»
Dennis Foley

Chief Acoustics Engineer

I will  add that the 2 other embeddings will impact critically the S.Q. in a different way than the acoustical controls or uncontrols but nonetheless in a very audible way....The electrical grid of the house and his noise floor is the sea where float the audio system... Not controlling this sea is opening the gates of distorsions hell.... :) Same for the importance of the resonance underestimated controls....

This not adocating for some disparate "tweaks" , my rant is advocating for a "method" accessible to anyone... The beginning is stating clearly the problem at the root of an audio experience and experiment....

What is the more important for Hi-Fi experience?

The choice between paying 2000 dollars for a speakers or 4000 dollars? Or the way to embed ANY speakers making it able to produce his utmost potential S. Q. ?

It is not difficult to answer.....Except for someone who sells speakers...Or some brand.... Etc....

If by clean you mean low distortion look at the Benchmark AHB2 probably one of the "cleanest " amplifiers around. 

The cleanliness of the electrical grid of the house can be more "critical" than the cleanliness of the amplifier.... Brand "choices" or "tastes" are not the solution, even if some amplifier are better than other one....

Class D is “to “ clean. I miss the “emotion “ in the music. Sometimes to flat. For me, the best one is tubes pure in class A. Off course the poweramp.is just one piece in the whole system. A good source, préamp, dac,speakers and cables are very important (electric power “cleaners” to). I have as poweramp (mononblocks) Wavac 805m:pure music!!

If Class D is too clean there are a few simple tweaks you might try. Obvious but slow is to just let the dust build up. If the sound is a bit dry and gritty and you would like a smoother softer focus try the Playboy Tweak, a thin coat of vaseline. Very popular all through the 80's. Keep in mind a clean amp is just the beginning. Don't forget to clay, polish and wax.