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In Reply to: RE: Class D amps and power chords posted by Duster on July 19, 2017 at 17:01:22
My first switching amplifier a PS Audio HCA-2, before I rewired my early seventies California home could be heard on the bedside Sony clock radio.
I constructed a DIY 10 gauge positive and common with an 8 gauge ground. I wrapped the cable with copper foil tape followed by a braided tube wrap grounded at the male plug end. This dramatically improved the RF issue. There was an immediate sonic difference akin to replacing lamp cord with a decent speaker cable. This amplifier took so long to run in detailing these sonic benefits continued to change for sone time.
After the homes amperage increase and the rewiring which included uninterrupted dedicated 20 amp BX clad lines terminated with metal receptacle boxes. Essentially shielded power from the underground grid to the components. This work was by far the biggest improvement in not only the audio and HT but seemingly everything electric.
I eventually replaced the Cardas Golden Ref speaker cable with some NuForce which offered slighly more body and definition.
Seems to be a very comprehensive DIY project, M-dB. The type I'd like to see posted more often in a forum such as Tweakers' Asylum, too.
What interface is the amplifier power cord connected to? Perhaps a power line conditioner or power distributor, or directly to the breaker box?
My electrician had a minor background in audiophelia enough to not smirk and the understanding that everything matters. He built a small sub panel ahead of the main breaker box specifically for the audio and home theater runs. Before the work I demo'd the amp with the stock power cord and the clock radio with jaw dropping affect.
The Utility upgraded from 100 to 400 amp service (for pool and hot tub) which came with a very large diameter cable to a new main breaker and a larger longer ground.
He used what he said is a better than what he usually used for breakers but I'm not sure what brand or model they are.
He did use Hospital grade Hubbell receptacles. Other than that both systems are star grounded into the same lines, no conditioning.
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