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Old 10th November 2017, 09:58 PM   #12471
VenusFly is online now VenusFly  Australia
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Funniest snake oil theories
But I thought thats what low ESR capacitors are for?
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Old 10th November 2017, 10:10 PM   #12472
HarryY is offline HarryY  United States
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Originally Posted by scott wurcer View Post
I have no problem with that at all, as long as it's understood there is a sound of tubes and someone prefers it. All of it is a simulation anyway.
Actually when you think about it most of it is a simulation.

You would need to put your playback speakers in the same place as the
microphones were in a live performance and in basically the same room.

We really don't even here the same thing the engineer who mixed it did
unless of course we are the one who mixed it and listening to it through
the same speakers in the same room.

A lot of people are chasing an illusion.

Interesting though as a kid we were playing around with making recordings
for headphones,where we placed the mics 6" apart and recorded what was
played through the speakers, My sister called us for supper and upon
playback I had answered her call only to realize it was her on the recording.

That was the closest to ever truly having a real playback
as close to original as I have ever really heard.
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Old 10th November 2017, 10:15 PM   #12473
VenusFly is online now VenusFly  Australia
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Originally Posted by HarryY View Post
Actually when you think about it most of it is a simulation.

You would need to put your playback speakers in the same place as the
microphones were in a live performance and in basically the same room.
That might be why a 50+ year old console stereo/mono record player sounds so good. Its just about the same height as a band would place their microphone which is usually at about the same height as a floor standing amplifier as used in a band.

I suppose the only thing missing is mid-bass speakers, technically speaking they should ideally be placed on the floor but we have historically moved mid-bass up to where the main speakers are, at about ear-height. If we filter out mid-bass however and move it down to the floor again we might be able to get a much more intact stereo image.

I'm thinking maybe a 8" or 12" driver in a large enclosure with a low wattage high sensitivity driver. Maybe open baffle so the rear wall adds to the effect.

Last edited by VenusFly; 10th November 2017 at 10:19 PM.
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Old 10th November 2017, 10:36 PM   #12474
VenusFly is online now VenusFly  Australia
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Europe - The Final Countdown (Official Video)
El misterio de la macabra - Barbara Hannigan y la Sinfónica de Londres

Last edited by VenusFly; 10th November 2017 at 10:40 PM.
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Old 10th November 2017, 11:55 PM   #12475
gerhard is online now gerhard  Germany
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Quote:
Originally Posted by HarryY View Post
One thing my brother told me about long ago was that some people would use very thin
speaker wire with SS amps in an attempt to make them sound more like a tube amp.

I would assume this would be an effort to decrease the Damping of a SS amp.
I suppose you mean decreasing the speaker damping by the SS amp.

I do not believe that there is much to that in reality.
Given the abysmal efficiency of a speaker to convert electrical to mechanical/
acoustical energy, the coupling forth & back cannot be a first order effect.

cheers,
Gerhard

who just recovers from a heavy metal concert. Tnx gods I had
excellent attenuators for my ears. (The driving force behind that
was my lil daughter )
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Old 11th November 2017, 09:53 AM   #12476
DF96 is online now DF96  England
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Originally Posted by soongsc
The situation is, current is being drawn interactively with the music, if this interaction is not fully isolated from the mains, then the difference occurs. In reality, it is not possible to obtain total isolation,
Sufficiently good isolation will be provided by any competent PSU. As I often say, cable sensitivity is a sign of poor electronic design.

Of course, with a Class B or Class D amplifier the mains current draw will vary with the music envelope but no amount of fancy cables will change that.
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Old 11th November 2017, 10:16 AM   #12477
billshurv is offline billshurv  United Kingdom
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Quote:
Originally Posted by gerhard View Post
I suppose you mean decreasing the speaker damping by the SS amp.

I do not believe that there is much to that in reality.
Given the abysmal efficiency of a speaker to convert electrical to mechanical/
acoustical energy, the coupling forth & back cannot be a first order effect.
It can make a significant change to the sub-100Hz FR of the speakers. I would not recommend it for passive speakers, but for actives it seems a valid tuning method. Rod Elliot uses it. But I don't want to open the currentdrive can of worms on here
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Old 11th November 2017, 10:50 AM   #12478
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I found this gem on Facebook...
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Old 11th November 2017, 11:09 AM   #12479
Charles Darwin is offline Charles Darwin  United Kingdom
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Originally Posted by billshurv View Post
It can make a significant change to the sub-100Hz FR of the speakers. I would not recommend it for passive speakers, but for actives it seems a valid tuning method. Rod Elliot uses it. But I don't want to open the currentdrive can of worms on here
Agreed although I would not ever use it.

I've never heard low bass sounding correct to me until I came across active speakers driven with low output impedance amps.
SS driven passive bass horns came close but they are far too large and too loud for home use (not a friend of bass speakers driven by mW, never seem to sound right).
So active, SS-driven with thick&short cables is for me. Others seem to hear things differently though.
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Old 11th November 2017, 11:10 AM   #12480
soongsc is offline soongsc  Taiwan
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Quote:
Originally Posted by DF96 View Post
Sufficiently good isolation will be provided by any competent PSU. As I often say, cable sensitivity is a sign of poor electronic design.



Of course, with a Class B or Class D amplifier the mains current draw will vary with the music envelope but no amount of fancy cables will change that.
If you just consider the transformer, the rectifier, and the filtering caps, I wonder what other design options you have? Perhaps you have a specific reference design which you consider not so sensitive? Switching power supplies would have different considerations. One design that someone tried to swap the power cable on was the NCD class D amplifier also in this forum. An O core transformer was used at
that time.
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