I did much better when comparing CD players that had a 10:1 price difference connected with interconnects with a 100:1 price difference. I was correct almost 50% of the time! 🤔
Ah the legendary Jbau. Thank you for your input. And i much appreciate your lm317 thread in the past. The circuit you left there has made a night and day difference to my preamp thats been compared favorably to multi thousand $ gears.
I feel sorry for folks in audio who spend so much time listening out for imperfection that they can't enjoy the music.
At this point in the conversation your problem is imaginary, you could have at least undertaken some basic DC measurements to determine if the circuit is functioning correctly. Now you have decided to move the goalposts to capacitors.
This thread is much ado about nothing.
Really tho? Did you see the pictures in my 1st post? Im competent enough to have designed that so whats keeping you from trusting that it works as well as it looks?
Its a je918 modified to utilize the ground layer + 2pole comp. Dc offset dialed to absolute 0 and rock stable bias. Very sensible layout with split/stitched ground planes.
Oh wait but my hearing is completely bogus so whats the use? 🤣
I even added ground lift resistor to the heatsinks cuz i could hear their added ringing without them but that mustve been imaginary too and a sheer luck because i did that before i came across the data confirming my findings.
Its a je918 modified to utilize the ground layer + 2pole comp. Dc offset dialed to absolute 0 and rock stable bias. Very sensible layout with split/stitched ground planes.
Oh wait but my hearing is completely bogus so whats the use? 🤣
I even added ground lift resistor to the heatsinks cuz i could hear their added ringing without them but that mustve been imaginary too and a sheer luck because i did that before i came across the data confirming my findings.
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A "Competent" individual wouldn't make an outrageous statement claiming Melf resistors add "holography" to audio signals.
A then b doesnt always lead to x. I can make some far fetched assumption strung out on coffee and still make circuits that work really well, and i do (both).
Generalize much? (you already took my words out of context so why not? 😆)
* to change sound to thin and shrill you need to lose Bass by a measurable and easily detectable amount, at least a couple dB, increase mid-highs by at least same amount and even better if said boost affects significant, pre-existing distortion.
All 3 parameters are easily measured, and repeatable.
That is not "subjective" but a real difference.
Now replacing one type or brand of resistor by another, where measurements do not change, no "sound" change is present or possible.
Unless resistor is horrible, like, say, 2 pins pushed in a potato at the proper distance to achieve expected resistive value.
But then it is not "a resistor" in the Electronic Components category but, as mentioned above, "a vaguely resistive behaving device"
"Air" and "holography"????
Gimme a break!!!!
FWIW, "the "thin and shrill" words are not the problem by themselves, they MAY describe a real, very audible difference.
I work custom making and modding amplifiers for Musicians, they use those words all the time because that´s their "language", they will definitely NOT talk Hertz and dB.
But then, if we start measuring, we DO find significative differences.
One practical example: a friend of mine, John Frondelli, runs a most famous Service shop in NY; his customers are the Top of the Top, everybody from Prince to Rolling Stones to local Churches to even US Navy and CIA ... plus most NY Recording Studios, Radio and TV stations, the works.
One famous customer is Irish rock band U2. They typically park a semi truck at the door once or twice a year, they unload all their equipment for checking and setup, to do whatever maintenance is needed before enrolling in a Worldwide Tour.
It´s well known by Fans (who love minute details about Stars) that lead Guitar player prefers and always uses a small Fender Princeton amplifier, he owns many (if anything , for backup) , but one stands up and is most used, specially for recording.
So I asked him if next time he could find any difference in it.
At first he answered "doubt so, all are store bought, Factory stock, if I repair anything I use exact same part as was there, all according to Factory schematic" .... but I (and a few others) insisted, so he finally put the "special" one , open chassis, side by side with another of the "regular" brothers and started checking parts one by one, from input jack to speaker one.
Plus measuring voltages, using fresh sets of tubes on both, even comparing wiring layout, comparing and ticking parts one by one with a Sharpie pen, both at each chassis and paper schematic.
And then he found it:
In his own words: "one .02uF coupling capacitor was actually .01uF, I didn´t notice at first because it was factory installed, not a hack/mod/repair job.
He didn´t tell me which one it was, there are only two of them, one after the second triode, the second before the Cathodyne PI; I suspect the first one, but not certain.
Both feed 1M grid resistors, cutoff frequency is either 8 Hz (original) or 16 Hz ("wrong" one) , both well below Guitar frequencies and doubly so considering the lightweight 10" speaker inside a small open back cabinet, audible difference could not come from that alone (and we are talking a 2:1 part value difference, not silly brand or colour)
But then I remembered that´s not the single audible function they perform. 😱
These amplifiers are always driven balls to the wall, and an often ignored side effect is that grids receiving dozens of Volts (hey, anything above 2V peak) rectify signal, create a negative voltage which strongly changes bias, changes waveform and duty cycle, change gain (hence: compress).
So standard "built in compressor/waveform changer" has a time constant of 20 milli seconds, the "wrong" one half as much, clearly tracks intricate solos much faster and THAT is noticeable, specially for a Musician using those amps every other day for years (decades?)
So yes, parts can "have sound", speaking with precision MODIFY sound (thinking they have an inherent sound is ludicrous or at least naïve) .... but that involves a gross part VALUE difference.
And being in a place where they can make a difference.
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Nope, your words not mine, I quoted from your first post where you stated:
Seriously, how do you expect anyone to help you at this point.
Well, he got the 3 or 4 staunch subjectivists of the Forum here, to mutually support and palm their backs, so I guess he achieved his (very very limited) goal.
😆😆😆
Should i dig up the forum to where john curl having favored a certain brand of resistors for their 'sound'? That should make it 5
You redressed to your purpose. Im no dogmatist but thats who you seem to want to lynch
What is the fascination with MELFs? What you want in an SMD resistor is a thin film 1206 or similar.
But you did NOT bring him here 😉
Count that as a failure.
In any case, he dropped quite a few notches in my appreciation when I read that statement.
Having designed very good stuff, many years ago, does not except him from Physics Laws Rules.
I read on the forum while back that it has the lowest thermal noise/distortion(?) Because of how its contructed. Its basically legless metal film resistors from what i understand.
Can you stop thinking I always address to you? For someone so easily offended you have an odd offensive way with other people. I certainly gave some constructive criticism but you did not react.
BTW as of now the thread still has the same provoking thread title.
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Are u rlly claiming all resistors sound same when theyre built differently with different material?
If built with "resistor" material, say various kinds of carbon or metal, yes, of course.
Are you trying to go back to square one or restart the thread?
Too late for that.
Are you trying to go back to square one or restart the thread?
Too late for that.
No its either a delusion or a belief. Why pity people who do not share your beliefs unless you are going out of your way to start an argument?
Tbf it looks as tho the jlcpcb resistors are 1/8w whereas the TH version uses 1/4w. I could be hearing a thermal noise difference in that.
And no im not trying to backtrack my words. Many of you think theres a lot of ego involved in what i type when im only here to learn and willing to admit i know less than most of you and from that likely to make mistakes.
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