Class D = which drivers?

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I am on the hunt for a few new amps for my RAAL tweeters and possibly other drivers, and was just wondering what the general consensus was around when to use Class D amps. I am a big fan of using Class D for bass, but it has often been suggested that it lacks the warmth for drivers further up the frequency range. I am currently powering my active tweeters and mids with a 5 channel A/B amp, but want to know at what point can I cross over to D. Currently I have… bass ~>20Hz, mid woofer ~>150Hz, mids ~>1000Hz, and tweeters ~>3500Hz
 
I have a TAS5630 based amp from Sure I bought almost 8 months ago and didn't even fit a little power supply to and play till a few weeks ago.
In short, I could have saved myself a year of pain chasing the high powered balanced sound from an amp. No more pioneer sx monsters, no more nothing. I want to sell em all and make a nice tube pre for this TAS5630 and not mess with much of the rest of the 70's.
Its that good. I dont think its good for bass and not treble etc ... its really well balanced and very rounded. Its sound is likely improved by putting a good tube pre, but well, its a theory for me @ this point. I will try it and see.

With a solid state crappy preamp (a proton 1100) it hit a home run.

Cool.
Srinath.
 
Well it was only last year when I heard a friends decent valve amps that I could see what they were talking about this "warmth". We tried several very decent amps that day, and I preferred the sweet inviting sound of the valve amp over the mega dollar Krell (only marginally) so there is definitely something to be said for it.

I know the ribbon tweeters I have prefer something less clinical as they are already as sharp as tacks, but I'm not sure at what point I can start to dial back the vocals and go with my much loved efficient Class D amps.
 
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