And fair enough too, in the context of how you're building your system it is the level of accuracy you need ...
However, I'm pointing out that to get optimum sound one has to worry about accuracy in every area - not just the obvious ones ...
Fas42, I suspect that you have tried just about everything. I have too. Let's see what our critics come up with.
I'm using Kimber 4TC loudspeaker cable as mains cable. (I don't like it as loudspeaker cable that much with transistor amps). Works better than standard mains RC or LC filters. Short length (3 feet) is enough.
How does the static build up in an electronic system, and you want to look what static does to systems, another myth to build on perhaps.
JC and FAS42 you two crack me up, JC with your pointless comments and Frank with your everything is bad... Audio reproduction is only a small field of electronics, there are other sensitive fields of electronics where things can be hooked up to the mains with no problems, the mains is dirty get over it, it will have high frequency noise due to power line communications get over it... go learn expand your field of knowledge...
That's what I've had to do all my working life designing PCBs, to keep pace with the changes, now I employ a lot of RF layout techniques when doing my boards to provide the best protection against EMC problems.
Your comments John are quite often totally meaningless and provide no real input to the problems perceived or real, they are a just pointless words that you use to keep up this mystique as a true audiophile guru/designer.
Neither of you have tried everything otherwise you would have solved the problem of noisy mains, many other good designers have for much more sensitive equipment, instead you spout on about magical esoteric solutions to inconsequential problems.
I should imagine from what I have seen in the real world that some consumer audio products have more thought put into them regarding noise and EMC than a lot of boutique audio products, because it is well known that a lot of the protection devices kill the sound...
And as to static...where there is a ground present static does not build up...
in all honesty, I wasn't convinced by TIM either. how does an amp able to reproduce a full-scale 20kHz size with low distortion care about it? why in the world should it be able to reproduce sines + square waves? until I ran into a post by John at Audio Asylum or something where he mentioned that "it only applies to serious audiophiles who use SACD or vinyl".
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No, but it feels like it at times ...!!
All problems can be solved with good engineering practices, like your use of RF design techniques - no need for 'magic'. Just like resolving a car problem, sometimes the biggest headache is understanding what it is that is actually causing a problem, locating where precisely the gremlin is.
So how do I know I have a problem? Because the sound is not good enough: I have a whole suite of subjective measures that give me a thumbs up, or a thumbs down.
Not every "bad" thing in the system has to be solved, just enough to give me satisfactory SQ; I'm only interested in applying as much problem solving as I need to, to get the job done.
Fas42, you see, they don't know anything specific. They just criticize. I had to work on making a successful AC line filter about 15 years ago, so I did my homework. Discussing my results here would just get the same 'criticism'. It is impressive how naive so many people can be about subjects that they have opinions on.
Yeah, we'll just keep staring at the ground and drooling. And designing and building equipment with excellent power supply performance, without having to invoke forces beyond those accounted for in conventional engineering.
yes, I for one do criticize and don't feel like apologizing. I do criticize equipment that doesn't do anything or does it in the most illogical fashion.
John, I sometimes think I can actually see you laughing behind your screen at the people who swallow the bait 🙂
I had to work on creating a successful AC line filter 27 years ago...
AC mains filtering is not new, what is, is the spectrum of noise on todays mains, a lot of it put there by harmonic drives from HVAC, power line communications etc.
Why if it involves good engineering practice would it get criticism...
I have a hunch, can't recall who said it though.
"Your comments John are quite often totally meaningless and provide no real input to the problems perceived or real, they are a just pointless words that you use to keep up this mystique as a true audiophile guru/designer."
How many technical innovations, backed up by solid engineering theory, have improved quality of audio replay over the decades.
How many audio tweaks and miraculous devices, in the same period, have stood the test of time ?
Probability and statistics theory indicate that Frank does not have a fair chance in the long run.
(wearing my RII-D2 briefs today)
How many audio tweaks and miraculous devices, in the same period, have stood the test of time ?
Probability and statistics theory indicate that Frank does not have a fair chance in the long run.
(wearing my RII-D2 briefs today)
Nope. The SLA of every public utility I've used is posted and shows a wide allowable variance in level and distortion. None even bother with noise. Due to the current heat wave Toronto's happens to be on my desktop. 'Normal' is anything between 110 VAC and 125 VAC. Extreme is outside 106 VAC and 127 VAC. THD is 5%.
Do a spectrum analysis on wall power with a resistive divider driving a high quality audio isolation transformer, it will disabuse you forever of the notion of sine wave utilities.
how about doing something interesting about the frequency problem?
a direct drive motor-generator coupling to decouple the electricity grid from the sound system?
or a flywheel and generate DC out of it while using the mass as an energy storage system for transients?
it could be fun build project just for the heck of it (not that i think it would matter much but it would certainly make the fancy power cable argument completely moot).
a direct drive motor-generator coupling to decouple the electricity grid from the sound system?
or a flywheel and generate DC out of it while using the mass as an energy storage system for transients?
it could be fun build project just for the heck of it (not that i think it would matter much but it would certainly make the fancy power cable argument completely moot).
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