Resistor Sound Quality?

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Here is little logical question. If how resistors are made and materials used give characteristic to the sound besides functioning as a resistor. Will those characteristic double if we double the resistors in series with sum of their resistance being same as single resistor ?
 
Hi Dario,

Its probably a collection of measurements that would show very clearly what you are talking about. But first, you would have to define what each sound was to you. After that it would be a simple matter to call the shots. Mind you, we would be talking about a microphone pickup to include the characteristics of the reproducer used.

Think about medical electronics for a moment. It is necessary for extremely low noise amplifiers to be used to pick up signals from an MRI machine. If resistors had an orientation, it would be extremely well documented and have become standard practice to orient the components properly. It isn't documented because what you are talking about is not true. Simple. You can be convinced to hear things that are not there only too easily.

Before you go there, let me just say that we measure and listen. We do not listen to music through our instruments as many untrained folks would like to say.

-Chris

The only boards where ferromagnetic components are not used for some reason🙂
Oh and on some I can guarantee resistor orientation is random...
 
only the best PCB layout designers use the auto random parts placement function

With SMD designs (ie 99% of boards these days) you don't have to worry about human s populating the boards so in my case electrical consideration come first (and always have done) including component rotations that are not orthogonal. Non polarised components end up rotated any way to fit in, then often the block of circuitry may be rotated... Then the resistors in the tape can be rotated and the machine can pick up from two sides adding more rotation...🙂
It is probably my cavalier and non standard views on layout why I get all the funky jobs and seem to be doing never ending analogue and PSU layouts these days, which I love as they are more challenging and taxing from both a signal integrity and EMC point of view...
 
Fresh solder effect, that one has passed me by in 30+ years, I guess its another audio only phenomena.... like directional resistors, cables and *** 's.

The fresh solder effect is real. But not for the fresh solder! When you resolder all the joints on a board you also fill in the through plated holes. As I suspect you know when the through plated connection needs to be really low loss you use a matrix of them. (Or at least some folks do.)

There is a slight but measurable drop in resistance when the holes are filled. So in some circuits there really is a performance change. Did show this in an article years back. Distortion really did drop with filled holes. Of course the wise will not use a through plated hole for the lower end of the voltage feedback divider.

Of course on hand soldered boards done originally with a lack of skill and a poor quality flux resoldering may actually help.
 
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And while I'm at it, whoever suggested tube rolling shouldn't make for any audible difference if and when the circuit is designed right?

It's not only that it shouldn't, it doesn't. But the circumstances need to be clear. With a never used valve or one that wasn't used for a long time the cathode needs a few hours to get to it's full emission level. That can easily be measured. That changes current draw which changes the operating point.
Depending on the circuit this might also change the operating points of other tubes (e.g. dc coupled, stacked supplies).
When the circuit is designed well then these variations will not kick the operating points out of the linear region.
 
With apologies to Lewis Carroll

"You are old, Father Jacco," the young man said,
"And your hair has become very white;
And yet you incessantly stand on your head—
Do you think, at your age, it is right?"

"In my youth," Father Jacco replied to his son,
"I feared it might injure the brain;
But now that I'm perfectly sure I have none,
Why, I do it again and again."
 
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