64.13.14.96
In Reply to: RE: Another engineer pipes in ... posted by bjh on June 25, 2009 at 08:01:25
"The point is that one can lean on one's engineering principles/background, bring in ideas from other fields and what-not, but the rubber hitting the tarmac is a different story altogether."
No it's not a different thing, not at all. Whether possibilities jump out at you or need to be sought after does somewhat depend upon what 'other fields' you have been plowing.
So, the power cord changes the sound, what does that mean and to whom does it mean it? Does the product no longer meet it's specifications? Probably not. Does it mean that the specifications are inadequate? Maybe.
Most likely if there is an error it's that in the internal product requirements. Either what you are experiencing was regarded as insignificant or whatever is causing it was missed completely. You can usually rely upon products meeting their production specifications, what's a lot iffier is relying upon those specifications to predict the outcome for all users.
"I was a bit surprised by what I thought was relatively modest sizing of the capacitor banks."
Physical size? Capacitance? ESR? Net energy storage? Capacitors have come a long way the last decade, especially in terms of HF ESR. How much capacitance you need depends upon the headroom and PSRR of the amplifier.
One of the things that's fun about this hobby is all of the counter-intuitive things you find that can affect the sound. I've had rum luck predicting whether I'll like the sound of something without listening to it. Size, color, cost, weight, brand et al are poor predictors. How can you tell a "better" power cord without trying it in a particular application?
Rick
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