Which clock?
I've looked up the damping plates on the net, did you compare them with something cheaper, bag of lead shot/door stop?
dCS, the effect is more noticable on the DAC so the pair might end up there
I didn't compare them to a bag of lead because I have to look at them
The HifiNews "Flix Dumper" (basically transformer irons in a small wooden box) and my favorite chromed doorstop do not do anything useful to the DAC. At one point I did compare the cheaper HES dampers to these and came to the conclusion that the heavier ones were the ones to have given the "relatively small" price difference.
Yesterday I listened to a whole range of "accessories" on a system comprising Apertura Edena speakers, Moon 760a power amp, dCS Rossini Apex DAC, Nordost QB8mk3, Qnet and Qpoint with similar cabling to mine - basically a slightly more modest version of my set up. The dealer and I were there to compare the impact of the Qkore eartting block (on the QB8mk3), the QSource linear power supply and the HRS dampers (on the DAC).
All worth having, all providing improvements to the overall sound. All more or less silly price. I came away with the HRS as the most cost effective and the conviction that if I wanted the other two items I'd have to scour the secondhand sites.
Also tried the Mark Levinson 585.5 integrated as an integrated amp and as a power amp but did not like it on those speakers (something in the bass in particular). Apparently it works well with Proac but, to my mind, it's a bit brutal with Apertura speakers.