The Future of Audio Amplification


I have recently paired an Audio Research DS225 Class D amplifier with an Audio Research tube preamplifier (SP8 mkii). I cannot believe how wonderful and lifelike my music sounds. The DS225 replaced an Audio Research SD135 Class AB amplifier. Perhaps the SD135 is just not as good as some of the better quality amps that are out there, but it got me thinking that amazingly wonderful sonance can be achieved with a tubed pre and Class D amp. I have a hunch that as more people experience this combination, it will likely catch on and become the future path of many, if not most audiophile systems. It is interesting that Audio Research has been at the forefront of this development.
distortions
The first time I got so excited that I danced to a music system was when I was about 5 listening to a six way mono really big box speaker through Heathkit tube gear in 1961 listening to Dvorak Slavonic Dances and Brahms Hungarian Dances on Capitol.

Since then, I have experienced many excitable recordings.  Even my wife claps after a really great recording/performance.  The most recent was In A Jazz Orbit by Bill Holman and Tchaikovsky Sym. No.1 with Michael Tilson Thomas and Boston Sym.   Toe tapping (former) and jumping up and down fun music (last movement latter).
Amp classes are like school grades. 

Closer to F the worse the sound.

a/ab still the best.

D is low level tripe
@mr_m 

I don't think so. Measurements reflect it. If you listen to half way sensitive speakers, 90dB/watt or better, .02% high order distortion is going to be problematic.