I have been told the same thing (
no conditioners recommended) by a few of Meridian's hierarchy over the years.

I think every demo I have attended put on by a dealer with M reps in attendance have used Transparent Audio power cables plugged directly into the wall socket along with Transparent interconnects where needed.

I know M USA always liked Transparent audio products but I know that is another subject (after market power cords etc.) that can be controversial.

My gear: Trinnov CI, 271, 8000.1(SEs), 7200.1 HC (SE), 320s, 3200s, Seaton F18 subs, MS200 (2nd zone), 218, 210.
Other: JVC RS-4100 projector, Lumagen Pro Radiance, Panamorph DCR anamorphic lens, Stewart G4 130 screen, Kaleidescape Strato K, Rvolution 4K player and Zapitti NAS, Oppo BDP-203,Roon Nucleus