Posted by Wayne Parham [ 71.153.185.72 ] on May 04, 2009 at 18:01:09:

In Reply to: amp questions posted by jim denton on April 29, 2009 at 19:55:59:

In my experience, SET is always best but I've heard (and own) some really nice push-pull and UL amps. The Achilles heel of the SET amp is the output transformer, and output impedance may adversely affect bass response especially in terms of damping and the ability to deal with back EMF. Some SET amps have enough output resistance to put the speaker circuit in an underdamped condition, which results in muddy sounding bass. This is a speaker/amp interface issue, so not all speakers will react the same to any given amp and vice versa.

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