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Old 20th April 2007, 05:41 AM   #41
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from the same site,

much more interesting-



http://www.g8wrb.org/useful-stuff/eb...-amplifier.pdf
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Old 20th April 2007, 05:50 AM   #42
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Quote:
Originally posted by tomtt
from the same site,

much more interesting-

No it's not.
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Old 20th April 2007, 05:53 AM   #43
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No it's not.


shure it is
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Old 20th April 2007, 05:58 AM   #44
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Ah! Le Professional! Now I am interested! SSSSnoreeee....
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Old 20th April 2007, 06:12 AM   #45
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Originally posted by MJL21193
Ah! Le Professional! Now I am interested! SSSSnoreeee....
Leave Léon alone!
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Old 20th April 2007, 06:14 AM   #46
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Quote:
Originally posted by Cloth Ears


Leave Léon alone!

a wise idea!


Click the image to open in full size.
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Old 20th April 2007, 07:49 AM   #47
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Quote:
Originally posted by MJL21193
Speaker cables are another story. They don't need shielding, they just need to have low impedance.
Actually, there is an argument for shielding loudspeaker cables. Most amplifiers have global feedback to tidy up distortion, lower output resistance etc. Or, to put it another way, amplifiers with global feedback have an aerial (the loudspeaker cable) connected to the input stage. To ensure stability, the feedback resistor usually has a capacitor across it, coupling the aerial rather well.
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Old 20th April 2007, 11:50 AM   #48
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Actually, there is an argument for shielding loudspeaker cables.
The point is there's an argument for everything. Shielding is not much more expensive. If you think it helps, do it.
I have a subwoofer that has two 18" drivers, wired for 4 ohms. This is driven by a homemade 500 watt amp, eq'ed by a Linkwitz transform. When I watch a movie at good volume , that sub is using all of that power (on transients). In a hurry to hear it when it was done, I grabbed the first thing handy: my trusty 18 gauge lamp cord. It works fine. Why? It's only 6' of wire. My DMM doesn't read low enough to measure the resistance.
It's still there. I've no reason to change it, it performs perfectly and introduces no noise (that I or anyone else can hear).
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Old 20th April 2007, 01:43 PM   #49
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Try that same thing with an "audiophile" 500W amp and you might find a difference. That's why I won't use anything exotic to drive my subs; the ancient Adcom 555 I have for my subs works just fine with whatever Home Depot wire I throw at it.
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Old 20th April 2007, 09:44 PM   #50
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... works just fine with whatever Home Depot wire I throw at it.
That's where I got my 100' roll of lamp cord.
So, what you are saying is that in the pusuit of the golden sound, amp manufacturers leave out components in the signal path that promote stability? Who would have guessed?
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