Werner
pfm Member
Is this what's trying to being said?:
All amplifiers that exhibit distortion below .1% and operated within their design parameters etc.
Sort of.
Imagine this test:
Take a UKP150 Boaringer, and a UKP15000 Krellinson.
Both are 100W in 8 Ohms. Both have less than 0.1% THD over a 20kHz bandwidth. The
same with IMD. Both have at least 50dB channel separation over the full bandwidth.
Both have a frequency response that is essentially blameless, say 0.1dB down at
20Hz and 20kHz. Both ... output impedance less than 0.1 Ohm.
Now pick a pair of speakers that allow both amplifiers to operate correctly (i.e. no Scintillas,
no 70dB/1W unicum, ...). Choose a preamp that drives both amplifiers without side effects (i.e. no tube preamp with 5k output impedance and a 470nF series capacitor, ...).
Do level matching to within 0.1dB or better and do the test.
Will night-and-day differences be heard? Will any differences be heard at all, reliably, repeatably?
That is the question.