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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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In Reply to: RE: A Mercedes and a bus... posted by Tre' on March 15, 2015 at 11:48:25:
Look-- the difference signal is most of what's left after common-mode attenuation has been applied.
It IS NOT----- ALL of the generated signal.
Your microphone-- let's assume it's balanced, is transmitting accurate total information from it's two equal but opposite outputs.. These two outputs truly are equal but opposite. BOTH contain both Common_Mode and difference signal information.
Some would argue that the mike element itself cancels any Common_mode across it. Theoretically, yes, actually it's only partial cancellation because of the mike's internal generator resistance.
However, when you apply a twisted wire pair (your mike's output cable) to the balanced signal, you have now installed an attenuator-- a Common_Mode attenuator.
Anything that the mike delivered that was common to both output leads is now attenuated-- so that mostly, only the difference signal remains..
We can argue all day about who prefers to listen to this sanitized mostly difference-only signal, or who prefers to have his mike cable not attenuate what Common-Mode existed inside the mike-- before the output wiring was applied.., but we cannot deny that a real difference exists.
There's more than just a difference signal that the mike is generating.
In practice, push-pull amps and balanced circuitry is clean because it's been cleaned-up-- mostly all that's left is the difference signal.
S.E. stuff sounds FAR more "real".
It does this because nothing that occurred naturally in the Common_mode is filtered out, sadly leaving only a difference signal to listen to.
A truly balanced difference signal is the Gold Standard for both balanced and push-pull circuitry. The less of anything else it contains, the cleaner and "better" it is.
The problem is that it WILL NOT convey a sense of reality to the listener. It is fully incapable of it.
That leaves S.E.-- distortions, hum and all the rest-- if you want music to sound real.
---Dennis---
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Follow Ups
- RE: A Mercedes and a bus... - tube wrangler 17:25:51 03/15/15 (2)
- RE: A Mercedes and a bus... - PakProtector 14:05:52 03/16/15 (0)
- RE: A Mercedes and a bus... - Tre' 18:19:01 03/15/15 (0)
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