i have a pair of concertos the originals, not home, which are less efficient, 87db, powered by an asl aq1003dt. this amp produces 30wpc and it is more then enough. my room is 12 x 15 with an 8 foot cieling and is opened to the rest of the house which is 40 feet in length. lafish is right sonus faber sound great with el34's. good luck.