VPN,
I haven't tried a sonic comparison but have my CH units on HRS nimbus footers.
Very satisfied with the result. I tried stacking my X1 unit with spikes but one of the four spikes was slightly loose and would rattle so i removed them altogether and run the units that way.
I have not tried the spikes with spike footer discs that CH now supplies with their gear.
Chris
Hello Chris, Thanks. I will see if I can try the HRS Nimbus at some point.