Jan Didden,
On my point of view, when *you* work on a power supply that provide a better galvanic isolation with the power mains supply, so less ground noise, you help more for a huge improvement of the sound quality of any pre-amplifiers, including Blowtorch like ;-) than fighting against supposed heretic "subjectivists".
Why don't we can talk of this kind of things, instead ? Share new ideas, our finds of good and non expensive components, providers etc ?
In a DIY spirit, far from financial interests and commercial intents.
Sincerely yours,
Tryphon Tournesol.
On my point of view, when *you* work on a power supply that provide a better galvanic isolation with the power mains supply, so less ground noise, you help more for a huge improvement of the sound quality of any pre-amplifiers, including Blowtorch like ;-) than fighting against supposed heretic "subjectivists".
Why don't we can talk of this kind of things, instead ? Share new ideas, our finds of good and non expensive components, providers etc ?
In a DIY spirit, far from financial interests and commercial intents.
Sincerely yours,
Tryphon Tournesol.
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By example, i was obliged to buy an used car in Portugal for administrative reasons.
i wanted to add to the old but quite good audio system of the car a bluetooth receiver.
Had problems with noise from the car alternator with a first circuit from the bay.
Found this one, with galvanic isolation of its PS.
Hifi 12V CSR8645 APT-X Bluetooth 4.0 Receiver Board for Car Amplifier Speaker | eBay
It is not Hi-End audio ;-) but the sound is now clean and dynamic, no noise at all, and i can listen on the road the > 2000 tunes from my Smartphone. Wireless.
i wanted to add to the old but quite good audio system of the car a bluetooth receiver.
Had problems with noise from the car alternator with a first circuit from the bay.
Found this one, with galvanic isolation of its PS.
Hifi 12V CSR8645 APT-X Bluetooth 4.0 Receiver Board for Car Amplifier Speaker | eBay
It is not Hi-End audio ;-) but the sound is now clean and dynamic, no noise at all, and i can listen on the road the > 2000 tunes from my Smartphone. Wireless.
Read this Humble Homemade Hifi - Cap Test . Nuff said.
They are a lot more sane than the veils removed by a cap change mob. And I generally build what I need.
Nope. Perfectly good quality passives are affordable for all. Only those who want musical instruments rather than accurate electronics need look to the flooby merchants.
And you are such a breath of fresh air to this forum because?
Fairy nuff
If only we could persuade more people to work out how to blind their testing we could really move the debate forwards
I would note that, in general people who make it to that grade understand a lot more about how the audio illusion is constructed. They know how to widen a stereo image, and how to adjust the depth of the soundstage to give the desired effect with tweaks of EQ. So it would not be unexpected for them to be able to pin down exactly where an aberration in response might be?
20 years is a good bet, professional disagreement (even strong) should always be possible otherwise you end up with guru/fanboy/sycophant discussions that BORE everyone else.
For frequency response, I would say yes. For what makes a particular vintage compressor sound exactly the way it does, probably not so much. The know what a piece of equipment does to sound, when to use it, and how to get the most out of it, which applies to everything they use including EQ. They can tell by ear if EQ is off half a dB at some frequency. Most are not degreed engineers, but some are. Many are put off by audiophile foolishness.
They are listening professionals, I would say. And, unlike audiophiles and magazine writers, they have to perform and have their work judged by other professionals or they won't stay employed. Too many people will listen to be able to fool everybody. So, if two or more independently determine they think some piece of equipment has a certain sound, it probably does. Not proof positive, but a good bet technical investigations and measurements should be able to uncover something. If not, maybe reason for some deeper investigation, but that would depend.
That's all in my opinion, of course.
So we just need to find two mastering engineering engineers who use silver cable and magic capacitors
I don't know about those two, but I would be interesting in talking to them. If pretty down to earth (unlikely), then some head scratching to do.
George,
A really nice manual. Explains quite a bit about the state of the art in the 1950s. I note the similarity to the RC servos used today.
I learned a lot when I took apart an outdated surplus military gyroscope. Interestingly enough there were bits of knowledge that slipped past me at that time. Realized or learned even more bits later about details that were not quite obvious.
The fun part I liked from the manual was about the polarizers.
Of course servicing the fail safe circuit might have made me nervous.
Thanks
ES
A really nice manual. Explains quite a bit about the state of the art in the 1950s. I note the similarity to the RC servos used today.
I learned a lot when I took apart an outdated surplus military gyroscope. Interestingly enough there were bits of knowledge that slipped past me at that time. Realized or learned even more bits later about details that were not quite obvious.
The fun part I liked from the manual was about the polarizers.
Of course servicing the fail safe circuit might have made me nervous.
Thanks
ES
Just to add a bit of fuel to the fire there is a measurable difference in the resistance versus frequency in copper vs silver wire particularly as the gauges gets larger.
Anyone care to actually measure a 3M length of each as just bare wire? Try something around 10 gauge to exaggerate the differences. Small difference but measurable and easily explained.
Anyone care to actually measure a 3M length of each as just bare wire? Try something around 10 gauge to exaggerate the differences. Small difference but measurable and easily explained.
You can measure just about anything connecting it to something that matters remains tenuous. I never asked, would you participate in say a naked Vishay vs ordinary Dale RN60's, no peeking, no cheats, you could be wrong sort of thing. I don't think your buddies did that, in fact I'm sure they didn't?
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If the hookup wire inside an amplifier has enough resistance to cause a detectable FR deviation then something is surely very broken? (says the man with an MC cartridge with pure silver coil windings
).Yes you can measure the difference. And yes that doesn't mean you can hear that difference. I actually think it may be something else that when I get the time I will look at. I need to thank Dimitri for getting me to reexamine that issue.
As to the difference between naked Vishay's and Dale's measurements indicate that with the right music material can reach perceptual limits! The correction mechanism in the Vishay's is mechanical and at low frequencies increases the distortion, particularly more than just the third harmonic. I suspect some prefer it because of the increased second order distortion.
My earlier tests were on 1,000 ohm samples. As the resistance changes there can be quite abrupt jumps in distortion. I suspect the process changes as the values shift.
No magic required. Just pick music that excites the different modes with minimum masking. (An important and not as easy at it seems item.)
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