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

s23chang Details Discussions Posts This discussion Message User 620 posts 06-12-2003 at 02:00pm Copy Comment URL Report Comment Edit Delete My tube system is driving 80db speakers It's how you match the system. My amp is a 55Watt/ch push and pull stereo tube amp i.e. if you have a 89db, you should have at least a 20Watt push pull tube amp although 15 Watt does makes sound but lack of control in bass. Damping factor on your speaker also plays a role.