@mofojo I emailed Lyngdorf and asked whether the system is diminished, especially Room Perfect, if I used an external amp.
Me: "I am interested in the 3400 integrated. I would like to clarify if ROOM PERFECT processing can be outputted via the analogue XLR outputs into an external amp. I know that non-ROOM PERFECT output can be sent to an external amp. My confusion arises from comment I heard that said that the 3400's amplification is essential for ROOM PERFECT to work. That is an external amp cannot do ROOM PERFECT."
Lyngdorf:
Hallo
RoomPerfect will function no matter how you output the signal - it just requires full-range stereo setup to work
so - no problem to use external amplifier(s) !
Best regards
Flemming Smith
LYNGDORF AUDIO
Thanks for the idea of keeping the unit on. I will definitively ask them to do so before the demo. I would love it, for the short term, if I could just use the 3400 and my analogue sources without an external amp. The Yamaha may also play better with the Lyngdorf amp versus the Persona 5F (which sounded great with the config and big demo room I described above).
BTW - I am looking forward to try the EtherREGEN if I get the 3400 for streaming vs getting a USB D-2-D streaming solution.