@singere M400s were awesome- I got an offer I couldn’t refuse to trade them in for 860A V2.
I used to have a McIntosh amp and when I was auditioning -I thought 330 blew an M462. So I decided to go for M400s.
I think 390 & M400s are an excellent combo with ability to add a turntable and the power and finish for virtually any speaker.