The use of OPA627

HiFiNutNut · 4th July 2005, 02:33 AM

I have 2 active EQ / XO circuits that consist of an input buffer, filter circuits for the HP and LP, one with an output buffer attenuation / gain on the LP. One totolling 5 opamps and the other 7 opamps per channel for two different sets of active speakers.

I have a plenty of OPA2134s but have not used OPA627. Is it worthwhile to give it a try?

In my circuits, all opamps (but one) are used as unity gain buffers so I am not so sure if replacing the OPA2134 with OPA627 will give any audible sound improvements. Replacing the whole lot is too expensive but if only replacing the output buffer then I am wondering how the sound can be improved because distortions are accumulative.

What do you think?

Regards,
Bill

Nuuk · 4th July 2005, 08:13 AM

In a word Bill - NO!

For that application the 2134 is fine. The 2604 is an alternative but I'd wager replacing them all would not make any difference to what you hear (and not be as satisfying as a buying a new CD).

HiFiNutNut · 5th July 2005, 06:17 AM

Thanks Nuuk. That was what I thought but your post makes me feel much surer.

Regards,
Bill

4th July 2005, 02:33 AM	#1
HiFiNutNut diyAudio Member Join Date: May 2004 Location: Sydney	The use of OPA627 I have 2 active EQ / XO circuits that consist of an input buffer, filter circuits for the HP and LP, one with an output buffer attenuation / gain on the LP. One totolling 5 opamps and the other 7 opamps per channel for two different sets of active speakers. I have a plenty of OPA2134s but have not used OPA627. Is it worthwhile to give it a try? In my circuits, all opamps (but one) are used as unity gain buffers so I am not so sure if replacing the OPA2134 with OPA627 will give any audible sound improvements. Replacing the whole lot is too expensive but if only replacing the output buffer then I am wondering how the sound can be improved because distortions are accumulative. What do you think? Regards, Bill

4th July 2005, 08:13 AM	#2
Nuuk diyAudio Member Join Date: Feb 2003 Location: Somerset, SW England	In a word Bill - NO! For that application the 2134 is fine. The 2604 is an alternative but I'd wager replacing them all would not make any difference to what you hear (and not be as satisfying as a buying a new CD). __________________ The truth need not be veiled, for it veils itself from the eyes of the ignorant.

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5th July 2005, 06:17 AM	#3
HiFiNutNut diyAudio Member Join Date: May 2004 Location: Sydney	Thanks Nuuk. That was what I thought but your post makes me feel much surer. Regards, Bill

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