Class D is just Dandy!

@erik squires
Eric , I purchased a used pair of Bang & Olufsen Penta 1 loudspeakers a few months ago on craigslist. They are circa 1989 . They are active with class d amps inside . These are in no way bright or fatiguing , things I have associated with older class d amps . Looking to find out how and why this could be ? 

This is probably over simplifying or incorrect, but maybe their maker voiced the speaker to the internal amps? Or did the amps only power the bass drivers?

@maplegrovemusic 

I don't find good digital amps bright or fatiguing today. 

In the late 1980's I was listening to some digital amps that sure were though! 

I don't know how old the B&O/ICEpower designs are, but that's what I listen to every day now. :)  It's quite possible the speakers, designed as integrated wholes, eliminated issues with the rest of the Class D crop. 

I will say that the Class D amps I was listening to wwas through entirely different speakers, TAD pro studio monitors from the time, so that could have been a horrible match overall. 

maplegrovemusic
  They are active with class d amps inside . These are in no way bright or fatiguing , things I have associated with older class d amps . Looking to find out how and why this could be ?

This may help, but the reviewer found it  a bit dry and lacking in harmonic complexity and bloom in the upper midrange, a bit dry in the mids, and maybe even somewhat aggressive on top.
It's one of the first, commercial Class-D that came after the original Class-T (Google these also as they only used N channel fets which allowed in some cases a higher switching frequency) 
The 18 year old Sharp  SM-SX100 Class-D, if you look at the 4 ohm frequency response it's already starting to roll off the high frequencies at 2khz, and the simulated speaker load is not much better.
https://www.stereophile.com/content/sharp-sm-sx100-digital-integrated-amplifier-measurements

Cheers George

I don't find good digital amps bright or fatiguing today.

What's a 'digital amp'??
Surely not a class D- I thought this thread was class D only ;)