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In Reply to: LM4562 op amp upgrade for Shanling CDP posted by trioid on September 10, 2007 at 07:36:30:
In the I/V conversion stage, the stock Cayin CDT-17A uses (4) AD827. For filter/buffer (4)OPA604 for balanced xlr and (2) OPA604 for RCA.I prefer to listen to listen to the RCA outputs, so this is what I have been modding(caps, wires etc).
First I replace (2) OPA604 with (2) OPA627 in buffer stage. The 627 has far more resolution and refinement IMO. But I still was unhappy with the sound.
Few days later, I replaced the AD827 with LM4562 in I/V stage. The LM is MUCH smoother/musical/transparent/refined. I hope that it stays this way because I like what I'm hearing. Gone is that etched high-speed sound of AD. If you are into speed, then the LM is not for you.
(I have (4) LME49710 on the way to me that I will compare to OPA627 and OPA604)
Edits: 09/15/07
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Follow Ups
- RE: Replaced AD827 with LM4562NA) my results - reb 07:35:19 09/15/07 (1)
- RE: Update - reb 14:01:22 09/15/07 (0)