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In the Forum: Audio Discussions
In the Thread: It’s mad, mad, mad... electricity.
Post Subject: SDS and balun random thoughtsPosted by N-set on: 12/27/2011
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 steverino wrote:
However, if I stuck the balun between the SDS and the turntable (ie the turntable plug into the balun and the balun into the SDS) then I heard noise reduction Without a negative effect on the sonics. But note that the SDS – balun – turntable motor have no direct connections with the audio components.



steverino, i read your observations with a big interest as i'm cooking something similar to SDS but 3-phase.
thinking aloud, this is what comes to my mind: SDS synthesizes sinewave from a scratch, there
is most probably some dedicated processor and a DAC. all that digital
synthesis vomits HF trash, which must be then filtered at the output.
if not, it's then likely to be propagted by the SDS-to-turnatble cable, acting as an antena, and
picked by the cartridge/SUTs/phono. I don't know what is at the SDS's output,
but perhaps their filtering is not good enough if placing
a PSA balun (a HF isolation tranny if I'm right)
improves the noise level.
why it acts as it acts on the wall-to-SDS side i'm pretty clueless (sound degradation). the digital synthesizer for sure
emits some trash also on the power supply side.
best,
N-set


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