Just think when you spend all that money, on high end audio products, your brain is already biased that it has to be really good when in fact it might be different, but better? Just looking at the beauty of the mechanical design sets your brain into thinking it is superior.
I have a customer who has all the old classics, Pioneer SX-1980, SX-1250, 1010, Marantz 2385, now he has a Oracle paris phono, which I find out is a few AD797's inside. The customer says he likes the new paris phono & 2385 the best. He only listens to first pressing LP's and has Altec Model 15 speakers. I find it strange since the pre-amp in the 2385 consists of Toshiba TA7136. I have serviced each one of the old ones, they all sound about the same to me 🙂
Like I can tell the difference between the old and the new ecaps?
Imo, real audio listening testing involves people who do not know and do not not want to know anything about electronics, like my wife for instance 🙂
I have a customer who has all the old classics, Pioneer SX-1980, SX-1250, 1010, Marantz 2385, now he has a Oracle paris phono, which I find out is a few AD797's inside. The customer says he likes the new paris phono & 2385 the best. He only listens to first pressing LP's and has Altec Model 15 speakers. I find it strange since the pre-amp in the 2385 consists of Toshiba TA7136. I have serviced each one of the old ones, they all sound about the same to me 🙂
Like I can tell the difference between the old and the new ecaps?
Imo, real audio listening testing involves people who do not know and do not not want to know anything about electronics, like my wife for instance 🙂
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What an incredible waste of time, unless you have a reputation to maintain I suppose.........
I have worked long enough, with enough EE's/tech's to recognize their social skill challenges 🙂
Dad taught me you do not know how stupid you are until you open your mouth.
I will throw 89 yo Mother in there as my UI tester, I can't use her for sound anymore, she only hears out of one ear to begin with.
Dad taught me you do not know how stupid you are until you open your mouth.
I will throw 89 yo Mother in there as my UI tester, I can't use her for sound anymore, she only hears out of one ear to begin with.
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Not obvious at all. Actualy rather naive. Like premium gas in most cars makes no difference at all, may be even worse because the engine was designed to use regular. Or replacing output transistors in a power amp with "better" ones ( higher Ft ) can cause the amp to be unstable, or replacing caps with "better" ones but the lower ESR has changed the freq. response. Etc. The sad part is that because of there expectation bias they sometims believe the new defective sound is better, and then tell everyone its an improvement, like its a fact. Because of course measurements mean nothing.
My dodge 3/4 ton has the higher compression 360 ..... it has to have premium or it would pre-detonate itself to death.
In my experience ‘better’ is quite subjective but if something is designed with the better parts in mind from the get go it will usually outperform.
I agree that just flinging around higher end parts and expecting ‘better’ is where most of this expectation bias comes into play.....but if you know you need something just like I know I need premium in my dodge it’s a different story.
I only use premium gas in 50:1, 2-stroke engines, they purr and bog with regular.
Electronic Voodoo is real.
Have a hard time deciding on which Nichicon ecap to use in the signal path, why do they make so many? what is it with the electrolyte chemistry/materials that makes them claim to be different?
Done up Bob Cordell's DH-220C design, have some one pimping the design to try it in the Perreaux 3150b amp with 6 double die Profusion laterals
He is using Vishay/Dale CMF60(RN60D), RN55 and Caddock MK 132, I think he is wasting his $. I was fine with Vishay SFR16S and regular MF's picks from what was in stock at Mouser.
Electronic Voodoo is real.
Have a hard time deciding on which Nichicon ecap to use in the signal path, why do they make so many? what is it with the electrolyte chemistry/materials that makes them claim to be different?
Done up Bob Cordell's DH-220C design, have some one pimping the design to try it in the Perreaux 3150b amp with 6 double die Profusion laterals
He is using Vishay/Dale CMF60(RN60D), RN55 and Caddock MK 132, I think he is wasting his $. I was fine with Vishay SFR16S and regular MF's picks from what was in stock at Mouser.
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Interesting rsavas - I picked up a 50 year old Pioneer SX-100TA that I am refurbishing - built in c. 1967. I've gotten one channel going, but the other has distortion (visible on a sine wave). FM and AM tuner section seems to be working fine - I have not tested the phono amp yet.
Working on it is like travelling back in time. Its a solid state (except for the FM tuner which uses 3 tubes) but its built like a tube amp. I paid 15 bucks for it at a junk shop - I'm enjoying the process.
Working on it is like travelling back in time. Its a solid state (except for the FM tuner which uses 3 tubes) but its built like a tube amp. I paid 15 bucks for it at a junk shop - I'm enjoying the process.
has anyone ever noticed a characteristic sound of high gnfb vs no or low gnfb?
For same distortion level or less?
Is there such thing as optimum gnfb as far as the sound is concerned? ?
THx-RNMarsh
For same distortion level or less?
Is there such thing as optimum gnfb as far as the sound is concerned? ?
THx-RNMarsh
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Ha ha, it is so true 🙂 Same applies to now private owners of beaten-up ex-broadcast Studer tape machines with worn out bearings and lousy lousy electronics. A couple of 'audiophile' cap swaps and they're in heaven. The looks apparently compensate for everything.
Pioneer SX-100TA, new one to me, a transition to SS design, point to point wiring, good luck with it. some old metal can bjts for sure, germaniums? No service manual at hifiengine is see.
Some woman work under this mode of operation, a few guys I know as well, until age sets in.
Bob Cordell's book shows a few amplifiers whose amount of global NFB can be varied by a potentiometer. Build one and listen to it with the pot at several settings, discover if you have a preference. In the 1st edition they are in chapters 24 and 25, I haven't received my copy of the 2nd edition yet.
No, you did not quote it; a full screen shot of your original post is here https://www.diyaudio.com/forums/the...wtorch-preamplifier-iii-2150.html#post5818749
Stop distorting reality please, it's not helping your cause.
Time much better spent to describe what would be an acceptable test plan that would address the simplest case of "do A and B sound different?". That, since a vanilla foobar ABX is apparently not good enough.
Or describe any interesting results on audio sensory testing, from his very own personal experience (which I am sure it is vast).
yes, thats a good idea. I am hoping someone did it already and could comment
I have different amps with high to low gnfb (VFA) and have formed a tentative conclusion but not listened to the same amp varied.
What do you think, JC?
-RNM
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Of course. Low gnfb can create a spray of high order harmonics, easily audible even for an untrained ear. You'd be better either with no gnfb or lots of gnfb.
John Curl has the floor now.
Flashnews, I prefer to share and discuss facts, not opinions. There is nothing to discuss in your prose about the sound of X.
If and when you choose to ignore facts (like in the famous CFA thread), that's your call, not my cup of tea.
All of this is pure conjecture and opinion on your part. As I said earlier, it seems only you can have an opinion, but everyone else has to come with facts - which h you seldom do BTW.
But anyway, if you feel better for having had a rant, I don't mind. Like I said, its hard to take you seriously.
But anyway, if you feel better for having had a rant, I don't mind. Like I said, its hard to take you seriously.
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You mean you don't remember "How do you listen to an ABX test?" thread over there back in 2015?
Maybe these quotes can help, "As said before, as very similar points were discussed in Meilgaards book", "Good you be more specific on the work that was disrespected and the role Zwicker and Fastl played?"
You can just load the VAS to reduce the loop again as well . . . but I think most would struggle to hear below 0.1% with normal music.
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