Why not use the LR thoughput on a surround receiver or preamp to feed your audiophile preamp which feeds your audiophile amp and audiophile L/R speakers? Most of these receivers/preamps are set up to allow pass through in stereo and then those channels become the L/R in the surround set up when you are in surround mode (watching movies)? All that’s required is to make sure the LR levels are matched with the whole group when in surround. Your audiophile system is integrated with your surround system and you operate the system differently depending on stereo or surround.
Brad
Brad