Hi Gandah and thanks for the welcome!,
Yeah the MUSES8920 in I/V and LPF sound very much like what is described of the MUSES01 edition, however it is a little sibilant (just the tiniest bit), swapping the LM4562's with MUSES8820's (Basically binned MUSES02's) trade a little bit of that massive Sound-stage (only width, depth seems the same) for less splashyness in the highs which is nice for bright HP's.
I also tried with MUSES8920 at buffer and MUSES8820 at LPF but prefer the overall tighter and better defined bass with the 8920 at LPF. I'd say this combination is a warmer tilt than the MUSES edition without losing detail so I feel music is quite rich and immersive.
The reason why I was asking whether it was safe is because the 8820 is a bipolar chip with a much lower slew rate than the 8920, that won't be a problem if the slower chip is in the place of buffer right?
The 8820 should still have more than enough to slew 192khz at 2vrms if my understanding of slew rate is correct... Since it's a much slower opa than the LM4562 hopefully I'm safe as far as stability in that socket is concerned right?
Thanks,