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Eeyore Eeyore is offline
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Default Stereo receievers: THD of .04 vs. .08



Peter Larsen wrote:

Eeyore wrote:

How it applies is to swamp the non-linear effect that results from
changes in output device transconductance when biased to lower
values of quiescent current.


If you're not familiar with that effect please say so.


My level of understanding is that the devices are always ON in the
quiescent current equivalent power range, ie "so" said.


There's FAR more to it than that. The 'switching' ON and OFF isn't
really the problem per se.


This is getting clearer from the current crop of new posts, very
interesting, thanks!


To elaborate, the cross-over region introduces a highly non-linear 'kink'
into the transfer characteristic of an amplifier at exactly the audibly
most critical point. No amount of obfuscation can deny that basic fact.
The smartest techniques to ameliorate the situation include 'moving' the
kink away from the zero signal region by various methods and 'stretching'
the kink so its effect at any given level is reduced.

Graham