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Old 7th November 2005, 03:09 PM   #21
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Quote:
Originally posted by sagarverma
will try out ad's whenever i find time to go to the elect. market.r they really worth so much money?how would u rate the performance difference vis-a-vis opa?(u have used both)
They are marketed as precision opamps for very high accuracy analog signals. I think they have a more dynamic sound. They bass is not as pronouced but I think they sound better in mid to high frequencies.

Also, what voltage rails do you have on you OPAs. I usually modify my amps to have +/-18V rails instead of the common +/-15V. That also helps with dynamics.
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Old 8th November 2005, 04:57 AM   #22
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Also, what voltage rails do you have on you OPAs. I usually modify my amps to have +/-18V rails instead of the common +/-15V. That also helps with dynamics.
oops!mine are lowly + - 12v
no problem as my transformer is + -20v dc and regulated down to this level.regulating it to + -15v is better for better sound

will try it too.thanks again
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Old 8th November 2005, 04:58 PM   #23
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Quote:
Originally posted by sagarverma


oops!mine are lowly + - 12v
no problem as my transformer is + -20v dc and regulated down to this level.regulating it to + -15v is better for better sound

will try it too.thanks again
This is usually because the main amp is a transistor stage. As you know, transistors are not that linear so by using an opamp you want to swing your signal(voltage) as much as you can to decrease the amount of transistor gain needed in the main amplification stage.
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Old 8th November 2005, 05:31 PM   #24
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Quote:
Originally posted by TO-3


This is usually because the main amp is a transistor stage. As you know, transistors are not that linear so by using an opamp you want to swing your signal(voltage) as much as you can to decrease the amount of transistor gain needed in the main amplification stage.

well i tried out + - 15v suggested but i didnt notice a drastic change(as was with opa's).althogh there was a marked and noticiable improvement(fullness to music;i suppose i making myself clear) in the music,it was not as dramatic as opa

but definately it is better.any other mod for improvement.

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