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Best sounding op-amp

I have a stock Music-Hall CD-25 that I'm planning on doing some 'easy' tweaks on. One of tweaks I had in mind was changing the op-amps. It currently has a pair of Burr-Brown OPA2134PA's, but I was curious if anyone had any experience/suggestions on other op-amps that might produce a little 'warmer' sound. Possibly considering one of the Analog Devices op-amps like the AD823 or AD827. Any feedback or recommendations would be appreciated.

thanks.
jwha
jwha OP
9 posts
 
Thanks for everyone's input... I'm leaning towards trying out the AD8620... does anyone know the difference between the AD8620-AR and AD8620-BR? The BR version is about double the price.

thanks.
eldartford
4,262 posts
 
If op amps influence sound as much as people are saying, then op amps are being used in circuits where they don't belong. The headphone amp cited by Chillysalsa is probably a prime example. Op amps, even "good" ones are a lot cheaper than circuitry implemented with discrete transistors, so I suppose that widespread use is inevitable. Tubes anyone?
richingoth
326 posts
 
Here is the link to the product date sheet:

http://www.analog.com/UploadedFiles/Data_Sheets/31592213475495AD8610_20_d.pdf

Regards,
Rich
s23chang
617 posts
 
The only difference between the AD8620A vs AD8620B is the voltage drift per changing temperature ( 0.8 to 3.5 uV/C vs 0.5 to 1.5 uV/C) If that's critical then it is worth the price. Temperature range from -40C to +125C
audioengr
3,282 posts
 
S23Chang wrote:
"After done much research, I found the AD8620 has the best spec."

Specs don't tell all. The on-die power delivery is what makes a great op-amp.
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