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Power supply hum transmitted to loudspeakers

I know the issue of hum and buzz has been discussed endlessly. Is it not almost universal that all amplifiers with power transformers have some low level power supply noise that will cause minimal leakage hum, buzz, or hiss through the loudspeaker with your ear close enough and no inputs to the amp connected?
Is this considered the noise floor of the amplifier? According to Galen Carol's website, if you can't hear it through the music and your system sounds the way you want it to, this idle noise should be ignored. Any thoughts?


normie57

Showing 1 response by toddverrone

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toddverrone
840 posts
 
@boxer12 i disagree about shielded power 'chords' being an absolute must.
i thought the same when i made my first batch of power cords and made them all shielded. they did, indeed, make my system quieter. after further builds with different architectures and materials, i have found that unshielded power cords can be just as quiet as shielded and can sound less compressed.  as usual, it all depends on the system.. the one caveat is that pretty much everyone agrees that digital components do best with shielded PCs.
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