What is your take on high efficient speakers vs. low efficient speakers?

I am a fan of the low power / high efficiency pairing.    I also feel that most higher efficiency speakers sound like live music and can be more dynamic.  I think they often sound better at lower volumes.  Just went from a pair of 40 watt Push Pull amps to a 300b and it's plenty of power for my space and listening habits.    

Interesting question because it puts two legitimate concepts in opposition. One is the view that the less you mess with the signal, the better the sound. Therefore, simple, well-designed amps are “best.” And those are going to tend to be low power. You could argue that means high-sensitivity speakers must follow, so you’ve got the perfect pairing. Except speaker sound is totally subjective (“it’s all in your head!”), and the variations in speakers are vast compared to electronics. After decades of close listening, what if you learn you prefer a low-sensitivity speaker, like Magnepan in my case? Then I say you find the electronics to drive it and just enjoy it. 

@jfuquay 

After decades of close listening, what if you learn you prefer a low-sensitivity speaker, like Magnepan in my case? Then I say you find the electronics to drive it and just enjoy it

Pure logic and experience clearly confirms this. Stubborn dogma isn’t persuasive or necessary. Choose what works and sounds best to you and pursue to the best of your ability.

Your approach is the opposite of mine. Does not matter, we both have found what individually suits best.👍

Charles

You can get "absolutely sound" with SET.

For example, 300B SET and ~95dB sensitivity 15" JBL or Tannoy in medium size room. If 300B SET build properly you can get enough dynamic headroom for any kind of music. From small jazz to symphonic music and rock.

The problem is - 99% of SET amplifiers designed and built for Lowther like speakers.

The critical distance for medium size room at 1KHz less then 2m. Actually 2m is the worst case. 

So, the pik volume can generate the system with 300B amplifier is -

spikers sensitivity + 9db (8w) - 3db (2m critical distance) + 3db (two speakers).

For example for 95dB speakers we get at least 104dB.