I run 3A Signatures with a Pass Aleph 4, which is 100 class A watts into 4 or 8 ohms. The Vandies are rated as a 6 ohm speaker. My room is 22 x 12 x 8 with adjoining spaces which are open to the listening area. There is no problem with compression, clipping etc. I don't listen to much rock but a lot of jazz. Although I don't listen at deafening levels, I do like to crank it a fair amount. I live in an apartment, so that probably limits me somewhat.
I have heard the DNA 1.0 and 0.5 and while good amps for the money, in my opinion, are not in the class of the Pass Aleph series. Either DNA may give out before the Pass ever will, due to the design of the Pass. Pass Aleph 4's, while not often seen on Audiogon used, are an excellent bargain (relatively cheap) and is an amp that you can keep for life.
I have heard the DNA 1.0 and 0.5 and while good amps for the money, in my opinion, are not in the class of the Pass Aleph series. Either DNA may give out before the Pass ever will, due to the design of the Pass. Pass Aleph 4's, while not often seen on Audiogon used, are an excellent bargain (relatively cheap) and is an amp that you can keep for life.