What about the Belles SA-100?

I do not know about the sa-100. But all the Dave Belles amps I have heard are excellent. Get very very close to some of the best for quite a bit less. They are made with a common sense approach and seem to have good dependability.

I've owned several of David's amps and preamps and totally agree with Marqmike.

EXCELLENT gear that almost no one has heard of. Very small company and very few dealers, (unfortunately), but what a wonderful sound and very well built.

I'm actually looking for a 150A or a 350A REFERENCE amp, if anyone has one.

I agree with both of you. These are excellent products. Still, it wonders me why, at least on this forum, one sees users of the almost similar priced 350A but never of the SA-100.

Love Belles amps, nice full presentation and they are very musical, definately different in a positive way from many other solid state amps I have heard.

Because all the '150 iterations have been around for so long maybe the ref 150 and 350 were easy upgrade paths. Maybe because ones system that they would have in place are mostly 'ready made' for the upper grade amps of the 150ref or 350's. Could be one reason for not hearing hardly anything about the other amps. Just a thought. When Dave began early on his first commercial amp was primarely a class a design and it was a great amp. So he has a lot of experience in designing a SA-30/SA-100 type of amp. So I would be looking at those if I ever need to change what I have. I thought I would just mention that when I have looked inside a Belles amp I don't see boutique parts. I think Dave eschews those things as much as he can. I think Dave just has solid designs. Nothing sexy but unbelievably good sounding with a wide range of speakers, very high standards of build quality and parts, and also nice looking.