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<blockquote data-quote="maylar" data-source="post: 1059002" data-attributes="member: 541144">its amazing.&nbsp; i made a basically &quot;for information only&quot; comment then realized it was confusing and a bit misleading in this context, so i removed it within 10 minutes.&nbsp; its been replied to a few times now.=========I didn&#039;t get to read it. But transformer coupled amps usually have lousy DF, so I&#039;ll assume that was your point.=========*&nbsp; the fact is, DF = 1 gives max power transfer.&nbsp; this isn&#039;t really so much relevent with solid state amps or even tube amps (due to transformers).&nbsp; really, only RF apps need this condition due to reflections that occure otherwise.=========And telephone circuits, and pro audio, and... anywhere getting max power transfer is more important than efficiency.=========for solid-state audio amps, losses in this source impedance are typically much less then the other losses in the amp.&nbsp; even at 100A output current, it typically only attributes 1W of loss.&nbsp; and amp putting out 100A is gonna be rated much higher then 1W!&nbsp; possibly 2500W @ 1/4 ohm?=========Good point. My comment was only that the power losses of a Thevinen source get lower as the load impedance rises or source impedance goes down. But source impedance in a real amp is from the feedback loop and output devices, and doesn&#039;t represent the actual series losses. As you said, it&#039;s not meaningful.Thanks for the banter. Hope the original poster isn&#039;t too confused.</blockquote>

[QUOTE="maylar, post: 1059002, member: 541144"] its amazing. i made a basically "for information only" comment then realized it was confusing and a bit misleading in this context, so i removed it within 10 minutes. its been replied to a few times now. ========= I didn't get to read it. But transformer coupled amps usually have lousy DF, so I'll assume that was your point. ========= * the fact is, DF = 1 gives max power transfer. this isn't really so much relevent with solid state amps or even tube amps (due to transformers). really, only RF apps need this condition due to reflections that occure otherwise. ========= And telephone circuits, and pro audio, and... anywhere getting max power transfer is more important than efficiency. ========= for solid-state audio amps, losses in this source impedance are typically much less then the other losses in the amp. even at 100A output current, it typically only attributes 1W of loss. and amp putting out 100A is gonna be rated much higher then 1W! possibly 2500W @ 1/4 ohm? ========= Good point. My comment was only that the power losses of a Thevinen source get lower as the load impedance rises or source impedance goes down. But source impedance in a real amp is from the feedback loop and output devices, and doesn't represent the actual series losses. As you said, it's not meaningful. Thanks for the banter. Hope the original poster isn't too confused. [/QUOTE]

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