For many years, I owned Response 2.5's which I drove with a Cary CAD-301SE amp. This was a little-known power amp that they made for a while. It used a larger chassis than the '300 integrated, but also had a pair of 300Bs. I think Cary rated it at 14W a channel. It drove the 2.5's to volumes well above any reasonable limit, and this in medium-sized rooms. So the little Cary integrated is definitely the way to go.