SY, regarding the input connector you are complaining about. First, what model did your boss buy? What is the ID on the connector? This is important, because I specify NEUTRIK for the JC-1, JC-2, and JC-3.
However, cheaper products, even based on my schematics often use cheap look-alikes, and we have stirred up big trouble internally over it, in this past, when they tried to use the cheap, steel based connectors on the initial JC-1.
However, IF the model is the HCA-23, I will have to allow the cheaper connector to be used. If it is the HCA-21, I will contact Parasound and complain.
In any case, the 'sonic' aspects of this connector could not possibly be something that you would believe in or be concerned about.
However, cheaper products, even based on my schematics often use cheap look-alikes, and we have stirred up big trouble internally over it, in this past, when they tried to use the cheap, steel based connectors on the initial JC-1.
However, IF the model is the HCA-23, I will have to allow the cheaper connector to be used. If it is the HCA-21, I will contact Parasound and complain.
In any case, the 'sonic' aspects of this connector could not possibly be something that you would believe in or be concerned about.
Too bad but even JC-1 has cheap chinese XLRs!! No Neutrik.
http://www.parasound.com/img/halo/jc1_rear_big.jpg
http://www.parasound.com/img/halo/jc1_rear_big.jpg
It is a picture from official Parasound website, as you may read from the web address.
Vladimir, yours are OK. But not gold plated, I would guess.
This exactly why, if you care about humanity, you should do a clear and concise tell all. True, it is basically all scattered here on these threads some how, some way, but getting it all togeather from here is almost impossible.
Even little me, at 51 years young, have started to document what I know that may be of value.
Ya' guys want a laugh? Here is my audiophile life is weirder than fiction story.
Are Neutrik less expensive than Canon XLRs ? I found Canon silver very good on the long run. When oxided, several successive plug/unplug and contacts are perfect again. I have some VERY old, working perfect.
The old problem with manufacturers or boss attempts to save few bucks, destroying the whole thing will remain for ever. I remember our boss, in 70's trying to change our epoxy boards to cardboards ones ! We had to argue with mechanical issues for the preamp, and temperature issue for our amp to keep them the way they had to be, and threaten him of our resignations !
The old problem with manufacturers or boss attempts to save few bucks, destroying the whole thing will remain for ever. I remember our boss, in 70's trying to change our epoxy boards to cardboards ones ! We had to argue with mechanical issues for the preamp, and temperature issue for our amp to keep them the way they had to be, and threaten him of our resignations !
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Test or bait?
Maybe you prefer these:
http://www.ti.com/lit/an/snoa475c/snoa475c.pdf
http://www.intersil.com/content/dam/Intersil/documents/an55/an551.pdf
Intersil fig. 1 standard Teradyne/GR/Tek/etc. test loop ancient history.
So, it is just a LOOK' decision, because of the existence of fakes, it looks cheaper ?
Manufacturers order their parts to the manufacturers, so they are not in concern with fakes. I found the Canon flexible isolator better, for heavy professional use, while Neutrik cords plugs are easier to weld and more resistant to lateral pulls.
Then there was the first time I used amplifiers with switching power supplies. I changed all the IEC cords to shielded ones. With 100+ amplifiers it made a difference. They were 14 gauge. Which under code would work for amplifiers rated to 3000 watts. Of course none of the amplifiers were that large or even loaded to below 8 ohms.
The next consultant in had all the power cords changed to thicker ones. Of course. They ended up with imported thicker cords still 14 gauge just way more plastic.
So you were hearing changes according to the polarity of only the mid driver then ?....if so, then there is nothing to be embarrassed about. Not noting the missing highs is another matter.
Dan.
Dan, no. The polarity of the mid was fixed. I was only changing the tweeter’s polarity.
The important point in this story is that because I was physically doing the action of switching the polarity (thus I was “certain” that an acoustical different effect will take place) I was genuinely fooled by my senses/brain that I was perceiving acoustic differences.
I had unwillingly turned this test into a blind test, on which of course I failed.
My hearing acuity (very degraded) is irrelevant. Were it relevant, I should have decided that I did not hear any difference.
Ed wrote on a relevant case with a professional involved. http://www.diyaudio.com/forums/analog-line-level/146693-john-curls-blowtorch-preamplifier-part-ii-3354.html#post3341643
This sent me back some 30 years ago when a singer was testing different mikes in a venue for to choose the best one for her.
It was me that brought the mikes there and I was asked to adjust the controls.
“Give me highs”, “give me lows”, “give me presence” she was not satisfied with the results, all this for half an hour.
After a while, on each call from her, I was just pretending that I was moving the controls with a high precision, so she could see that. I was doing no actual adjustment. She started to like the results.
She ended with one mike and asked me to mark the final settings on the console.
She was fooled by her senses as I was -confirmed- fooled 30 years later (and unconfirmed all these years and beyond).
See the storie of the three fools above.
You have –for your own sake- to prove this reliability to you.
That’s why I proposed it, suggesting to look for mechanical issues, before loosing your time with investigations on magnetics. Compare the results of the sandbag with the results of the brick.
It follows from your hypothesis that you have to check first if the brick has any relative permeability different from the value of 1. Are you willing to do that?
George
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Limited slew-rate, witch gives the basses attacks to sound 'soft'. A kick drum can have a very fast attack edge, at high level, and we perceive-it as 'bass'.
When I started dropping in high slew rate op-amps to modify a preamp or reverb the bass was the first thing I noticed.- Status
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