Roberjerman, I will agree that if you never play louder than 85 db you do not need much power and I had a very good audiophile friend in Miami who never did and he use to sit right on top of his Dalquist speakers wearing them almost like a set of headphones. His wife who was a sweetheart had relegated him to the smallest room in the house. I bought my Heresy's back in, lets see I was 17 at the time so that would be 1971. I think that was just when they were released. In college I use to drive the crap out of them with a Phase Linear 700. I use a YFE YF 20 sound level meter which is a fun piece to have and not very expensive. I can adjust my volume very accurately when AB ing equipment using a sine wave. At 100 db you are for certain clipping your amp. SETs do clip very gracefully which is one of the attractions and Herey's are very efficient. When I first got mine I had a Dynaco Stereo 70 which for my teenage ears did not play loudly enough. But, I had come from AR 2Ax speakers so the Heresy's were a big improvement. Subs would have helped but we did not have them back then. If your SETs do the job for you that is wonderful. They certainly can sound beautiful but I am the crazy maniac who wants the drum set in my media room and that requires serious power and subs even with efficient systems. Peaks can easily require 10 times the power which again is one of the big draws of tube amps. They clip more gracefully which allows them to play louder before getting obnoxious.
