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Can't really say. My guess ? Politics.charles
Please lets move on. This thread is not about this subject.
I guess I did. But my point was that the smps600/nc400 combo was unaffected by the cords (both subjectively and objectively). What properties do you think your 3 superior cables had that the others didn't, and how did they affect the PS and amp?
Of course, really good spectrum analysis of the AC line and testing with different power cables (and power conditioners) could tell us if my feelings are correct, but who has a really good spectrum analyizer capable of that? Not me, unfortunately.
At the time of this test Pete did provide one of the participants a pair of his cables that were a version of his upcoming cables. I never used the ones Pete made for the Veritas in the group. This comparison was done several months ago. Pete's new cables that are out now I am told are better. I hope to hear them one day.
... and they are "not even remotely close" in design or voicing of my "Digital American" power cables... Different conductors, different connectors, different connector bodies, not shielded for high frequency noise, yaddya, yaddya, yaddya...
Pete, what properties of your cable do you think has the primary influence on the smps600/nc400 combo?
PM sent - as pointed out, this is not a thread about cables (even though you asked the question)...
Hi Pete and thanks for the clarification. He was not using a Ncore. He has a Class D Hybrid Amps. Arion Audio HS500 with Dueland input cap upgrade. These are D amps with a tube input stage.Yes, I like your cables too. Someday I will try your new design.
Here's what I PM'd Julf earlier in a nutshell...
Most importantly (the tricky part), is that I did not increase Capacitance of the cable by these shielding techniques. Most traditional shielding techniques increase capacitance, which greatly reduce dynamics, providing a dark-sounding cable with terrible PRAT!
I designed my cables (especially the new digital) to be super quiet, dynamic, but most importantly very natural & organic sounding with real life-like PRAT...
And for completeness, here is the main part of my reply:Yes, shielding tends to increase capacitance, but aren't we talking about AC mains cables? How do the rather small amounts of capacitance affect PRAT, considering the power supplies usually have a lot of capacitance (and the mains network is full of snubber capacitors)?I still fail to see the correlation between shielding the AC mains cable and improvements in PRAT. What specific aspects of the operation of the amplifier are improved?
From my experience & testing, increased capacitance in a power cable is not a good attribute, and has the tendency to exhibit a less dynamic, duller sounding, lifeless reproduction of music playback...
Think of a power cable as filter, some bad, some good, some better than others... does it improve the amplifier? No, but eliminating a lot of the high frequency grunge going into the amplifier does result in an improved sound quality output...
Please refer to "barrows" earlier comments, "The SMPS do spray out a bunch of high frequency harmonics, despite their filtering (even the simple AM radio test will demonstrate this). The power cable can affect what happens with these harmonics. A power cable could, for example, act as a good antenna broadcasting these harmonics to be picked up elsewhere by the system where they could then intermodulate with the analog signal. The harmonics could travel back through the cable, and then on to the AC input side of other components, again with deleterious results. I have experimented with different (mostly DIY, but some high end product as well) cables on class D/SMPS amps, and have noticed differences, and I have come to the conclusion that cables well designed to not broadcast RF (by geometry and/or sheilding) and with RF damping included generally work well for me. Of course, different cable designs will attenuate/sheild different frequencies of RF differently, and different systems will respond (or not) to RF degrtadation effects differently, so individual experience will vary as well as to the subjective results. I suspect that these same causes/effects are responsible for peoples' experience with power conditioners and class D/SMPS amplifiers."
Bottom line, "proof is the the pudding", that is, listening tests, to see if you're able to discern any differences & improvements in sound quality.
This is what I have a problem with. In your view, *why* does increased capacitance lead to "the tendency to exhibit a less dynamic, duller sounding, lifeless reproduction of music playback"?But the higher the capacitance, the more the cable filters, so aren't you contradicting yourself?He presents that as speculation for why a power cable might possibly affect the sound. I was hoping you, as a cable vendor, could actually provide a real, verified model for how it does affect the sound. How does the additional HF noise result in less "PRAT"? Does it happen with all SMPS/amp combinations? Or only with some? What causes the difference?Indeed. As long as you listen with your ears, and not with your eyes or expectations. That is for each of us to determine for ourselves - but once you start making marketing claims, there is more of a burden of proof.
Do you want mathematical equations & measurements on why there is sonic differences with increased capacitance?
Measurements don't always "tell the truth", especially if you're not measuring the right parameters and what are the right parameters (series & parallel inductance, capacitance, resistance, Z, etc, etc.)
For you to ponder, here's an interview with Caelin Gabriel, president of Shunyata, who provides a little insight...
I am a licensed Professional Engineer by trade and not a marketer... Do you want mathematical equations & measurements on why there is sonic differences with increased capacitance?
