the damping factor rule.

[marce]

13 hours ago, lucretius said:

Over damping has a good transient response in the bass, but suffers from a significant loss in sound pressure in the bass, according to Nelson Pass anyway; others disagree. Also, apparently, there are some speakers (high-efficiency?) that require an amplifier with a low damping factor to reproduce rich, full-bodied sound.

Horn speakers are one example where low damping can benefit. I use to have an SS system (Kef 104/2 Audiolab) and a SET with home built Fostex horns. When I used the Audiolab on the horns the bass was almost non existent, the valve amps made them sing... Mr Pass may have been referring to horn speakers.