Opa128sm_opa2107sm

Mikewong · 13th June 2009, 03:07 PM

The OPA128SM(single) and OPA2107SM(dual),both in TO99(metal can) are being rated as the best Audio Opamps within the orient hifi circles.They are almost obsolete items and costing a ton of money。And there are lot of remarked items circulating in the used market。
I myself haven`t tried one and the best that I am using right now are LME49710HA and LME49720HA。

CJ900RR · 14th June 2009, 12:58 AM

ok...

Artie · 20th June 2009, 12:15 AM

I'm surprised that it would be desirable for audio, with only a 3V/uS slew rate. Then again, its input bias current is rated in femto-amps!

wwenze · 20th June 2009, 01:58 AM

Well slew-rate isn't everything... OPA2107 is a popular replacement for stock op-amps because of the sound, OPA627 doesn't have amazing slew rate either, and LM6172 and its 3000V/µs doesn't sound any better.

But this kind of thread doesn't warrant any kind of response other than "ok, good for you".

Artie · 20th June 2009, 02:13 AM

Quote:

Originally posted by wwenze
Well slew-rate isn't everything...

But this kind of thread doesn't warrant any kind of response other than "ok, good for you".

Well, it's good for something. I just learned that slew rate may not be all its cracked up to be.

Thanks for the info.

Mikewong · 20th June 2009, 04:12 PM

Quote:

Originally posted by Artie
I'm surprised that it would be desirable for audio, with only a 3V/uS slew rate. Then again, its input bias current is rated in femto-amps!

The advice given by those using these Opamp:Hear to believe and be surprised!

13th June 2009, 03:07 PM	#1
Mikewong diyAudio Member Join Date: Apr 2003 Location: Milan	Opa128sm_opa2107sm The OPA128SM(single) and OPA2107SM(dual),both in TO99(metal can) are being rated as the best Audio Opamps within the orient hifi circles.They are almost obsolete items and costing a ton of money。And there are lot of remarked items circulating in the used market。 I myself haven`t tried one and the best that I am using right now are LME49710HA and LME49720HA。

14th June 2009, 12:58 AM	#2
CJ900RR diyAudio Member Join Date: Jan 2006 Location: Alingsås	ok... __________________ Best regards, Calle... Website is remade and updated, welcome! www.leetmaa.se

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20th June 2009, 12:15 AM	#3
Artie diyAudio Member Join Date: Jul 2007	I'm surprised that it would be desirable for audio, with only a 3V/uS slew rate. Then again, its input bias current is rated in femto-amps!

20th June 2009, 01:58 AM	#4
wwenze diyAudio Member Join Date: Mar 2008	Well slew-rate isn't everything... OPA2107 is a popular replacement for stock op-amps because of the sound, OPA627 doesn't have amazing slew rate either, and LM6172 and its 3000V/µs doesn't sound any better. But this kind of thread doesn't warrant any kind of response other than "ok, good for you".

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