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Joined 2002
classd4sure said:
Looks like the wife kept the couch
I couldn't get your link to work.
Sorry for got to apply the directory Browsing 😀
jleaman said:
Works good now.
http://jleaman.ath.cx/Alec/EPSN0008.jpg
Are those the Shakti paper cups? Tubes... suspended wire... someone made a killing off this poor guy, I hope he doesn't find out about class d, he'd have a breakdown.
Member
Joined 2002
classd4sure said:
I cant really comment on class d.. BUT i can garentee that no class d amp will sound better than this setup.
Another not.. nothing touches the floor 😀 he has money but he was wise with his money and he has lots of equpment and cables in the back of his other room for spare.. he's a smart guy for sure..
jleaman said:
I can't really comment suspending the wires it but for me it's a leap well into the voodoo area and away from engineering.
Tubes.... well, if you like their sound that's fine, pay for it. If you think it's the ultimate sound, we disagree. I guarantee I have an amp that would make that guy cry, i'll even let my wires touch the floor. 🙂
Member
Joined 2002
classd4sure said:
Well id like to buy a class d amp but i cant get a responce from ken..
Curently i only run class a.. and my own design of a hi speed Class ab.
Member
Joined 2002
Check your hotmail. As far as I'm concerned he sells nothing when he can't be bothered to reply to queries.
classd4sure said:
Not any less solid engineering than "snubberizeriarizerised" 😉 filter caps or...or...or....You name it. Not long time ago i noticed that if i tap or sratch my +60db measurement preamp input cable even slighly with my finger it results audible pops and scratcy noise. Its a long reach to call this audible under normal conditions, but so what, develop your own theory why its still disturbing 😉
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Joined 2002
mzzj said:
It was kind of a joke about Shakti.... have you seen their products?
I _do_ like that he used foam cups and string and whatever else instead 300$ a pop magic blocks that are just repainted surplus junk. But does he understand why he did it? Do you?
This is one "tweak" I'd love to put to a blind test.
Yeaup, that will have to be one of those things I hear with my own ears.
If I hear it though I'm not going to run for the string, I will do my best to figure out the mechanism which causes it, test and experiment as required, or maybe just just research the work of others who've already done so. From the little I do know about cables I'm led to think a better cable would be in order. Bruno has an interesting article about them someplace around here, he did a little work, ran a few tests/experiments, came to a reasonably believable conclusion. I'd think his hope is others pick up that work where he left off and see what comes of it.
The voodoo in this one is I don't think people understand what the cause is and yet, somehow, here's a cure!
Venders like I mentioned above with their expensive surplus wire stands who push the voodoo make it sound like the culprit in this instance is the floor, nothing more. Why then dont' they sell very expensive non magnetic staples, so you can put the suckers up on the ceiling? What if I have a wood floor, would it be the same as cement, or carpet?
If it's a static or dielectric absorption issue, how about a conductive sleeve, which I think PVC is?
You hint it's motion/impact/mechanical strain perhaps, which I find far more believable than it simply being the floor. So if that's the case.... I'd imagine that suspending it would make it far more prone to movement and vibration, than it would be if it were just sitting on the floor like usual, or taped to it.
I'd like to point out the difference between this cable suspension stuff and the snuberuooizikonai junk. In a nutshell, I took the time and effort to research it and figure it out to the best of my ability why/how/where it could be beneficial, and found it certainly does have technical merit, well within the engineering realm, well away from the snake oil. As a result, I'd now be willing to implement it in a circuit, and will have some level of understanding about what I'm trying to achieve with it when I do.
I'm sure some will be more than happy to just slap it in there, for them it will remain voodoo, good for them. What will they do when it doesn't give them the expected results, but it worked for them before..... *scratch scratch*.... damn voodoo. Probably dismiss what I've found is a very old and useful trick as being voodoo and never look back, what a big mistake huh?
Anyway, I've never seen cables bouncing around on the floor, but I'd achieve it long before anyone with a tube amp does. Maybe then I'll grab a roll of tape .... just so nobody trips on it anyway.
I don't think at that power level any such cable effects would be at all audible.
Slapping bandaids on imaginary problem after imaginary problem is a rich man's game, not for the DIYer, not this one anyway.
BTW.... (just can't stop myself)... if you smack a cap with a spoon, be it magnetic or wooden, you'll hear a "thud"... if you squeeze it it will affect the sound.... maybe putting them in a foam cup is a good idea
Since I mentioned it, I thought it was only fair I provide the link.
http://www.audioholics.com/techtips/audioprinciples/interconnects/Cable-Distortion.html
It's a great read.
http://www.audioholics.com/techtips/audioprinciples/interconnects/Cable-Distortion.html
It's a great read.
classd4sure said:
I would like to put plenty of things to blind test, starting from your ears whose claim class-d so superior 😀 Personally i have problems distingquishing difference between undistorted piano sound and +10% distortion added in abx test...
mzzj said:
Didn't think you could get undistored piano sound from Hi-Fi. What speakers can do that?😀
Required preasure
Chris,
What brand of pressure chamber do you use, or did you DIY? I have found you must use inert gas for the full effect. Don’t bother with any of the others Argon is the only way to go. I find around 427.5 PSI insures a good bond and won't destroy the cap in the process. A timed pressure release is necessary as well, anything less than 43 minutes is not long enough. I had to DIY the release valve as I couldn’t get the precision I needed from any commercial units. Don't forget to bake it at exactly 100 dec C to set it. This requires exactly 37.5 minutes in a pre heated oven.
Roger
classd4sure said:
I'd like to help you but I'm just too busy shrinking foam cups onto my T-networks
Chris,
What brand of pressure chamber do you use, or did you DIY? I have found you must use inert gas for the full effect. Don’t bother with any of the others Argon is the only way to go. I find around 427.5 PSI insures a good bond and won't destroy the cap in the process. A timed pressure release is necessary as well, anything less than 43 minutes is not long enough. I had to DIY the release valve as I couldn’t get the precision I needed from any commercial units. Don't forget to bake it at exactly 100 dec C to set it. This requires exactly 37.5 minutes in a pre heated oven.
Roger
Roger,
Having anticipated the foam cup would eventually dry and crack under pressure, (NASA doesn't learn from their mistakes but I do), I opted to use a homebrew slurry of rubber "rockguard" mixed with powedered vermiculite along with very fine particles of fiber strand mixed in a high speed aerator for 1 hour. A few drops of epoxy hardner thrown into the mix during the last few minutes (exactly when is confidential) allows it to set within five minutes of applying it (dipping). No oven required.
Having anticipated the foam cup would eventually dry and crack under pressure, (NASA doesn't learn from their mistakes but I do), I opted to use a homebrew slurry of rubber "rockguard" mixed with powedered vermiculite along with very fine particles of fiber strand mixed in a high speed aerator for 1 hour. A few drops of epoxy hardner thrown into the mix during the last few minutes (exactly when is confidential) allows it to set within five minutes of applying it (dipping). No oven required.
Hi,
well, I do agree that cables are microphonic. I recently changed humbucker on my son's electric guitar and he complained about increased level of hum. So while testing with his Marshall amp at full gain, i have heard just what mzzj described. This might be attributed to high levels of input and source impedance in guitar amps, where minute changes in cable capacitance get amplified. I'd bet that effect would be far less audible in 50Ohm setup.
Another example of microphonic component is LF356 opamp. I once used it in high gain application ( several tens of times, I don't recall exactly how much), and just by bending the PCB I could get 200mV changes in output offset voltage. Opamp was in SO-8 case, so I later redesigned PCB for DIP-8 footprint.
Best regards,
Jaka Racman
well, I do agree that cables are microphonic. I recently changed humbucker on my son's electric guitar and he complained about increased level of hum. So while testing with his Marshall amp at full gain, i have heard just what mzzj described. This might be attributed to high levels of input and source impedance in guitar amps, where minute changes in cable capacitance get amplified. I'd bet that effect would be far less audible in 50Ohm setup.
Another example of microphonic component is LF356 opamp. I once used it in high gain application ( several tens of times, I don't recall exactly how much), and just by bending the PCB I could get 200mV changes in output offset voltage. Opamp was in SO-8 case, so I later redesigned PCB for DIP-8 footprint.
Best regards,
Jaka Racman
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