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Old 4th July 2005, 03:33 AM   #1
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Default 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
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Old 4th July 2005, 09:13 AM   #2
Nuuk is offline Nuuk  United Kingdom
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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).
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Old 5th July 2005, 07:17 AM   #3
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Thanks Nuuk. That was what I thought but your post makes me feel much surer.

Regards,
Bill
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