Maybe a single case ringing is not a problem, but when I ran 6x135s, when the music stopped you could hear a bell-like drone that lasted over a second as the cases spat the stored energy out. This was much louder than ‘faint’, and must have modulated the sound coming out of the speakers.j
I had a tourchiere style lamp with a glass shade that rang even lounder, and was banished from the listening room for that very reason.
Some say the outer platter of an LP12 rings and indeed it does, but not when placed on the inner platter. Also all the subs ring, apparently the more it rings the better its sounds. Somewhere in all this, ringing is good. 
Or even a different continent and not plugged in.
Naim components are intended to give the listeners the desire to participate with the musicians, tapping the feet, shaking your body…etc.
The ringing case is intentional, to stimulate that collective emulation.
I’ve used turntable record weights in the past.
Yes, that’s basically what the Herbie’s Supersonic Stabilizer is but without the spindle hole. The record weight version stops the ringing equally.
Never noticed any ringing with my kit, and I am not about to start looking for it!
If you stand close to your Naim boxes and do a frequency sweep with your voice - low to high - you will likely hear zzzzzziiiinnnngggg.
Only noticed this on our CDX when the cat was told loudly to find somewhere else to preen. Put a copy of Linda McCartney Veg Cook Book on top but made no difference to the sound etc.
My rack rings but again I don’t feel it interferes with the music just a small ring if the music is loud the the turned down quickly.
Hmm. What’s the ‘text’ equivalent of deja-vu?
I’ve been well aware of the ringing from the early days of owning chrome bumper stuff but I’m sure I was told that the ringing is a way that the equipment releases stored energy and is good for SQ. A lot of the metal frames like the Sound Org tables use to ring like crazy and I’m sure we are all aware that the glass on a Naim Fraim has to ring correctly to work well.
Whether or not the cases ring, can you hear any difference between deadened / muted cases, and those which sing along? Does the ringing adversely affect the experience?
I only believe my ears, and so should everyone.
Everyone has their own preference. The OP would prefer to not hear his casework joining in…
What is it you are using?
I looked into the Moon gel drum dampening but apparently it can leave a residue so won’t be following that up
I have a HRS Damping Plate on loan from my dealer. It’s the DPX-14545 model, which is 14.5” x 4.5” x 1.3” and 7.1 lbs.
I’m trying it out on the case of my Boulder phono-stage. I hope to make some assessments about it later this week.
I always wonder why the 552 sounds better on the top shelf, it has a decoupled circuit board and all that, there must be some reason.
There’s a product called Dynamat. It’s adhesive backed made to dampen metal bits in a car. Use inside the top cover, there’s also lots of home brew stuff you can used
Dynamat inside the equipment is not something I would be happy doing as I am fearful of it coming unstuck and falling onto the electronics, possibly causing irreparable damage.
I would not attach it to the outer casing either as it’s quite difficult to remove the residue and will more than probably look very unsightly
What I am looking for is some form of dampener that will soak up the energy (sound) from the casing without leaving any trace of its existence once removed.
I would prefer something like a big rubber block that I can attach some self adhesive felt to the bottom of, or similar.
