That is why... in the music industry... everyone pretty much knows that 2 solidstate watts equal 1 tube watt... That's why you see all these solid state combos that make 300 watts... or 350 watts... The highest tube amp you're going to find is probably going to be between 150-200... period. 50 tube watts are equally as loud as 100 solid state watts... I've read plenty of books that state the same thing.