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My question was not whether you could measure a difference but whether you heard any. Do you ever trust your ears?
Quote from: JoshK on 4 Dec 2006, 12:54 amMy question was not whether you could measure a difference but whether you heard any. Do you ever trust your ears? Eye witness testimony has been shown to be quite unreliable with the advent of DNA testing (yes, those ghastly "measurements"). Is it because people don't trust their eyes? Or is it because scientific testing is more reliable and repeatable? A test tube not caring about emotional or psychological responses that can lead to error.Do you think "Ear witness" testimony is more reliable than repeatable scientific measurement? Or less reliable?You mention Dr Geddes (Physics/Acoustics) as the electrical measurement only man. Why no mention of his partner Dr. Lee, whose specialty is Psychology/Audiology?cheers,AJ
I meant with cables....
Quote from: JoshK on 4 Dec 2006, 01:11 amI meant with cables....See my previous post. d.b.
Quote from: LightFire on 3 Dec 2006, 05:52 pm ABX tests will show there is no difference.This is incorrect -- ABX tests cannot demonstrate this.
ABX tests will show there is no difference.
Quote from: JohnR on 3 Dec 2006, 06:00 pmQuote from: LightFire on 3 Dec 2006, 05:52 pm ABX tests will show there is no difference.This is incorrect -- ABX tests cannot demonstrate this.Of course it is correct. Would you let me know why do you think it is not?
Dayglo,I don't follow the point you are trying to make. Are you saying that yes, we are ableto identify small changes in the time domain with immediate switchability, with which Iwould definitely agree. If you're saying that burn-in may result in time domain changes, then that should be measureable.If using a component changes the properties of the dielectrics through heat, etc., I canbuy into that, however, when you're talking about small changes in the speed of electricitythat approaches the speed of light, I don't believe the effect is possibly audible.
Quote from: Dan Banquer on 4 Dec 2006, 01:38 amQuote from: JoshK on 4 Dec 2006, 01:11 amI meant with cables....See my previous post. d.b.[/quoteIf you meant that cables had to be used to hear your system, then yes you answered my question, otherwise you didn't. I answered your question. d.b.
Quote from: JoshK on 4 Dec 2006, 01:11 amI meant with cables....See my previous post. d.b.[/quoteIf you meant that cables had to be used to hear your system, then yes you answered my question, otherwise you didn't.
QuoteOn any well designed solid state unit there should be no significant measurement changes. The only thing that has any real aging properties are electrolytic capacitors, and after 500 hours of use they should be very close to original condition. This does not answer my question, which specifically asked if you have ever measured the electrical properties of a brand new component upon installation, and again after several hundred hours of use to determine what changes have occurred. You propose that there should be no significant measurement changes, yet as you admit below you have not done the testing required to support this theory. QuoteAs far as my own products are concerned I have never measured or heard much of anything in 5 or 10 years of age. At fifteen years it's time to replace the electrolytic caps. Since you have not measured in your own equipment what you are asking me to measure, you cannot prove your theory any more than I can prove mine.Can you be specific about what equipment I will need to acquire, borrow or rent to conduct the appropriate tests, and can you also please tell me what specifically to test? I would think measurements taken at the outputs of the component in question would do the trick, yes?
On any well designed solid state unit there should be no significant measurement changes. The only thing that has any real aging properties are electrolytic capacitors, and after 500 hours of use they should be very close to original condition.
As far as my own products are concerned I have never measured or heard much of anything in 5 or 10 years of age. At fifteen years it's time to replace the electrolytic caps.
Mr. Banquer, what equipment would I require to measure changes in noise, frequency response and distortion, and where would these measurements be taken?Since no one in this discussion has done measurements, we can not conclude anything at this time.