With PI-7 cornerhorns and TAD 1602 there is no need for a subwoofer, I am getting response down to 25Hz and about 1kHz at the other end. It is also very effecient, I was using my 180W SS amp on these but just for kicks I tried my 45 Parafeed amp on it and boy was I surprised!! At 1/10th the power of my SS, bass is taut and detailed not flabby at all. Of course I have to listen with the volume at 3/4 compared to only 1/4 with the SS. So I am thinking a 300B should be more than enough and kick butt with these horns.

Jeff