Decided to replace the JRC4556AD in my Denon AVP-A1 phone amp stage. What a good improvement this was (using Qobuz), vocals crystal clear, highs more sparkling and a bit more bass (but much more tight). I didn't use the pramp for headphone listening because it was dull, lifeless and floppy bass with 4556, now I enjoy it again.
While I was at it also replaced most resistors, capacitors and installed opamp socket for easy opamp rolling.