I don't know how to anticipate a benefit and I agree that this is not a power issue. It seems to be a distortion issue (or failure to remain linear).
With the Salon2's, the bass crossover is no longer connected to the upper crossovers and this seems to have an impact on the performance of the A21. It seems that an amplifier that can drive more difficult loads may not experience the same interaction or benefit. I thought the A21 was up to the challenge but I now have reason to doubt that.
Pejorative terms like "Fools Bi-amping" and other boorish forum behavior seems to dissuade many from trying. For those interested, I recommend the following:
- Use a Pure Direct mode (don't use DSPs to duplicate the channel)
- Split your signal with a Y connector to 2 channels of your current amp
- Drive only one speaker (Harman does it, it works at home too )
- Use stackable banana-plugs to make switching easy (and less dangerous)
Let someone else both be the listener and the gear switcher.
Of all the experiments you can try, this one is very cheap. It only costs if you find a benefit and have to obtain additional channels of amplification.
- Rich