Preamp Deal of the Century

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My 20yo Chenin is quiet, all cords and IC;s have those foam pipe tubes cut to length and separates AC from the signal wires.

All components seperated on their own shelf, I had hum at one time and that seemed to resolve it.

@richmon A bit off topic but I wonder if your foam tubes might not unintended effects on the sound. Off hand, two theoretical hypotheses come to mind (although I’m not an expert): 1) the foam acts as an additional insulator that counteracts the developer’s intended design and construction of the cable(s); and 2) on another forum SR’s Ted Denny recently linked a video that speaks to how the fastest moving electrical fields pass mainly outside the cable, not through the wire, which raises the possibility that your tubes are interfering. For example, in the 19th century the first underwater (ocean) telegraph cables that were held together by iron sheaths were quickly deemed a failure because of the latter’s interference. Foam is not iron, obviously, but what evidence do you have that its properties or mere presence don’t interfere to some degree? The video Denny linked, "The Big Misconception About Electricity, is on YouTube:


My foam tubes are on the interconnects where the AC cord is nearby or crossing,  my goal was to eliminate or reduce those electrical fields in and around the AC from the signal. wire/interconnects. Sorry I wasn't clearer about that, no foam tubes are on the power cords.

I'm not smart enough to fully understand Ted's video but I presumed he was referring to AC flow and that didn't apply to the signal current flow. 

I’m not sure your presumption is correct. This subject came up because of SR’s Carbon Tuning Disks, which are meant to be placed on power cords and IC’s to deal with the external fields that the video discusses. Here are are a couple of links, but first I should say that in my system they degraded the sound on balance or at best had no effect, depending on placement, so I returned them. It was hinted to me that they work more assuredly on SR cables. There’s a thread about them at WBF, including a few posts by Denny —


"world class" is a tall claim, what level of gear was used in the rest of the system to make this evaluation?