In tube systems is 90db efficency really the low?

I've read that speakers running off tube amps, mono or stereo, should have at least at 90db sensetivity. Is this the consensus, and is so why?

madcrescent06-11-2003 3:48am

dopogue Details Discussions Posts This discussion Message User 1,773 posts 06-11-2003 at 11:35am Copy Comment URL Report Comment Edit Delete It also depends on the speakers' impedance curves and complexity of their crossover networks. Speakers with benign impedance curves (no dips much below 8 ohms) and simple crossovers can sound great even with low-power amps, even if their sensitivity is in the high 80s. Example: ProAc Response 2 speakers, which I've head sounding fantastic powered by 6 wpc SET amps.