I did damp my Vcaps and did not find any benefit. But having the cap secured, rather than having it dangling on its leads did matter. So, if that amounts to damping then maybe be it makes sense. On the Quickie, I have the caps (obbligato) placed against the frame and I have some silicon adhesive ( the kind you use in fish tanks, the stuff that remains soft)placed on the cap and the frame. I does not move and hopefully the soft adhesive helps.
I have used this silicon gel to line my subs as well, to avoid air gaps, and at the same time ensure that it does not harden and crack , due to vibration. I have tried to post some pics of my rooms, but it seems that the upload area is full. Maybe Doc will be in better shape on the 2nd !!!
shreekant
system 1. oppo, quickie,SEX 2.1 ( V cap), Decware DFR8 in ZOB cabs
System 2. Tascam cd200, Terra Dac,Zbox,Decware Zen amp(V cap) Lowther PM6A in Acousta horns.
Maple rack, Brass footers,Power conditioner, dedicated treated room, iso pads, plenty of tubes. All cables DIY.