I own a Supernait 3
I don’t use any din connectors only RCA
The unused din all have rubber caps on them .
Sounds much better.
IMHO.
I’ve never used shorting plugs in over 40 years if the input isn’t selected it’s not complete so why bother.
Shorting plugs do nothing on Naim amps as each DIN socket is connected via a relay.
So there’s nothing other than a few cm of an open circuit wire/PCB behind the socket, i.e. nothing to short.
No experience with Acoustic Revive, but I use shorting plugs on all my unused inputs. I bought some RCA ones plus one DIN ‘shortie’ from Russ Andrews: since the DIN ones are not exactly dirt-cheap, I worked out how they were wired and made up my own using Deltron plugs, which is what the RA ones seemed to be. A little bit of wooden dowel to seal off the end and job was a good ‘un.