Many years ago, I went to a dealer to audition amplifiers to use with my Acoustat 1+1 speakers. The dealer, who had sold me my pair, had a big Rowland amp hooked up to his 1+1 speakers. It sounded okay, but it didn't really quite do it for me. He then switched in a smaller Rowland amp that was built on a similar design, used the same type of transistors, but, only put out something like 50 watts. I actually liked the smaller amp more--it seemed more lively. I admit that I am not a deep bass freak and the Acoustats would not be able to deliver deep bass anyway, but, in other respects, the lower wattage version of the particular design worked better for me.