Question about set amps and low sensitivity spkrs

The problem is, if you have speakers that have large impedance dips, and you have an amp that feeds the same power into the different impedance loads, then you end up with unbalanced sound as the frequencies at the lower impedances will have less volume.

Therefore, those speakers require power that doubles into the lower impedances for balanced sound.

That's why tube amps work better with speakers with flat impedance curves.

Newbee, I agree that a tube amp generally puts out the same power into different impedance loads of the speaker, but I'm talking about the output taps (4ohm, 8ohm etc.) of the amplifier. I thought that into the same loads, the 4ohm tap and the 8 ohm taps put out different power. That was my understanding with the Music Reference gear (I think he said a 3db drop using the 4ohm tap into a 8ohm load versus the 8 ohm tap); but I could be wrong.

Pubul57, Don't think so, but I've never owned or researched a MR amp. Nice stuff though.

FWIW the only thing I know of that halves power output of an amp, accross the bandwidth, is (for example) an amp which uses multiple types of power tubes and, say, is designed for max power from using 2 6550s/KT88's/KT90's per channel and putting out 80wts +/-, but the amp also allows for substitution of EL34s/6L6's. Putting in the EL34's etc will about halve the power output. Lest someone get anxious, this is not so with amps that are very conservative, such as Primaluna which doesn't seek max power from the principle tube, therefor doesn't reduce much more than a few watts when the smaller power tubes are used.

FWIW.