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Audio and Video Talk
General Discussion
External Power Amps and AVR challenging conventional Wisdom? Or Not?
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<blockquote data-quote="handsome" data-source="post: 1010314" data-attributes="member: 772"><p>If the internal power amps have no load they cannot do anything...even if they try! The load is a loop from + to - and thats were the current flows (through the loudspeaker) no loop = no current. An idling power amp draws very, very little current (especially in a multichannel AVR) and that current will constant not swinging up and down like when there is a signal so hard to see how an idling power amp could affect the preamp signal. The only advantage would be if the output amplifiers were class-D amps as they switch at a high frequency (even when idling) and that might cause some interference - so switching off those kind of power amps might slightly improve the preamp signal to noise ratio.</p></blockquote><p></p>
[QUOTE="handsome, post: 1010314, member: 772"] If the internal power amps have no load they cannot do anything...even if they try! The load is a loop from + to - and thats were the current flows (through the loudspeaker) no loop = no current. An idling power amp draws very, very little current (especially in a multichannel AVR) and that current will constant not swinging up and down like when there is a signal so hard to see how an idling power amp could affect the preamp signal. The only advantage would be if the output amplifiers were class-D amps as they switch at a high frequency (even when idling) and that might cause some interference - so switching off those kind of power amps might slightly improve the preamp signal to noise ratio. [/QUOTE]
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Audio and Video Talk
General Discussion
External Power Amps and AVR challenging conventional Wisdom? Or Not?
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