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Old 29th July 2013, 01:07 PM   #21
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An amplifier by its definition IS a DC to Daylight device.

You then limit those to your particular application. In a perfect world, your amp is that little triangle with perfect specs that you then limit for your application.

Adding colouring to make it sound more pleasing isnt a hi-fi aim. the Hi Fi aim is to make sure there is NO colouring, or distortion.
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Old 29th July 2013, 01:42 PM   #22
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It has been discussed ad nauseum...
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Old 29th July 2013, 01:46 PM   #23
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Yea sorry for bringing up something thats been discussed to death.

Its just confusing. WHY ADD DISTORTION? I guess your aims are "do you want it to sound nicer to your ears? or do you want it to sound more like what it is."
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Old 29th July 2013, 02:30 PM   #24
DF96 is offline DF96  England
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Quote:
Originally Posted by Rainwulf
An amplifier by its definition IS a DC to Daylight device.
Whose definition is that? That might be the fairy-tale world of elementary textbooks, but not reality. I would expect an ideal amp to have a finite gain and a finite bandwidth. It might go down to DC, but it won't go up to daylight - if it did it would have too much noise.
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Old 29th July 2013, 02:36 PM   #25
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I should clarify that. "Op-amp"
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Old 29th July 2013, 02:42 PM   #26
DF96 is offline DF96  England
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I was talking about audio amps, not components within them.

Opamps themselves have very tiny bandwidth without feedback. It could be argued that an ideal opamp functions as an integrator, so that means infinitesimal open loop bandwidth!
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Old 29th July 2013, 02:51 PM   #27
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Im learning more and more! Thanks!
I need to learn more about op-amps thats for sure.
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Old 29th July 2013, 04:37 PM   #28
tomchr is offline tomchr  United States
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Op-amps aren't DC-daylight devices either. Look at the datasheet for one (or turn to chapter 2 in your op-amp textbook). You'll find that they have input offsets, input current, non-zero output impedance, finite bandwidth, noise, distortion, and a whole bunch of other non-idealities. An ideal opamp only exists within the context of a textbook. It's used to make the math easier.

Same with a point source (light or sound). Or an infinite plane (electromagnetics).

Like electric guitar? Personally, I love Gilmore's guitar solo on Pink Floyd, "Comfortably Numb". Most guitarists - including Gilmore on above mentioned track - use lots of effects on their guitars to make a certain sound. Distortion (usually THD well over 100 %) is one of the milder ones. There's also delay and reverb. Various time varying frequency selective filters (wah pedal).

~Tom
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