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Joined: 3/14/2013(UTC) Posts: 16  Location: istanbul
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hi,
I want to replace buffalo 32s opamp. It uses 2 single lme49710ma. Can you suggest any opamp model instead of these?
For example can I use opa1632 single opa?
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Rank: Member
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Joined: 1/12/2009(UTC)
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What's wrong with the existing ones?
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Rank: Member
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Joined: 3/14/2013(UTC) Posts: 16 Location: istanbul
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actually there is no problem. I want to try different sound character
muses 8920 is another candidate. It looks suitable
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Rank: Advanced Member
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Joined: 6/12/2008(UTC)
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Location: Norway
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OPA1632 is a differential inn/out chip, it has completely different pin-configuration and can not be used. I am sure the circuit is designed for the LME49710, and that it will work best with those. Other well regarded alternatives could be OPA1611 or LME49990.
In my opinion OPAMP rolling is a bad idea. You will probably be better off leaving it as it is. It is also easy to destroy components and even the PCB when desoldering/resoldering.
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I would concur with steinholien. If there's no problem with it, I would leave it alone.
If you want a different sound, you'd have more success with different speakers or moving them. The listening room will also influence the sound to a large degree. You already have a very accurate DAC, tinkering with it will make no difference (or make it worse) unless you know more than Russ/Brian about DACs.
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If you're sure you want to do it then solder a dip8 socket and try various opamps. I'd recommend starting with single opamps of LME family similar to the stock one you have so you don't have to worry about compatibility as much.
I recently played with (dual) opamps in buffalo 3 and replaced stock LM4562NA with LME49860. Although many say they're all the same opamp (spec wise) - they sound quite different and 49860 resulted in less bright/forward sound with stronger bass and better resolution/transparency/soundstage. In LM family alone there should be enough versions to find the sound that will suite you. If you'll go for OPA is a more dangerous road because they're different from LM and you can't be 100% sure how they'll fit and perform in that circuit...
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The LME49710 opamps on the Buffalo32s are acting as power buffers and are not (directly) handling audio signals.
I would recommend extreme caution in replacing them.
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Joined: 4/28/2013(UTC) Posts: 55  Location: Auckland Thanks: 1 times
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My next step is to try the MUSES02, looks like it should work
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