In Reply to: RE: The speaker's the thing... posted by saki70 on January 12, 2015 at 10:55:04:
A lot also depends on the particular OTL and the design of the speaker, as well as its impedance. More at the url below.
The Atma-Sphere amps don't run feedback, so the speaker might require more care in the choice, but Merlins are similar to what you describe and they work great with our M-60 and other OTLs too. So impedance is not the last word.
However, FWIW:
There really isn't a good argument for a 4 ohm speaker if your goal is sound quality, regardless of the amplifier you use. Look at the specs of any amplifier made and you will see that the 4 ohm distortion value is consistently higher regardless of the amp.
The kinds of distortions in this case happen to be of the type that are easily audible (higher ordered harmonics). The result is that the amp will sound harsher and less detailed. So a simple method of getting any speaker to seem smoother and more detailed is to simply build to to be a higher impedance.
If sound pressure is your goal then you have a 3 db argument for 4 ohms.
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Follow Ups
- Actually that should work just fine - Ralph 11:19:25 01/12/15 (0)