Rather than a fixed 8Ω, it may be interesting to use speaker impedance or
EPDR instead, if that number is handy.
My speakers are rated at 4Ω nominal so I'd need to double the number.
Their minimal EDPR is only 1.5Ω so that would be 5 1/3 the number.
Using your voltages,
@Lavcat , I'd need 12.5-33 1/3 W "normal" and 344-917 1/3 W.
Darn! the amps I'm getting only go to 800W peak ...
My research and home experimentations suggest that the sweet spot for CD is between 1989-1996?
Why?
In 1989 (maybe '90), the 24b ADC was introduced and my home experiments suggest that 16b doesn't record some instruments correctly (horns, in my tests) and cymbals (which produce sounds with details 16b doesn't capture).
1996 is the beginning of the loudness wars, which go on to 2003?
With the above in mind, I look for CDs remastered post-1990 or recordings with a provenance of analog higher rated ADC (24b/48Khz).