REL Strata III spikes


I have a REL Strata III sub. The interior of the feet have threaded holes that I assume accommodate spikes. Did spikes come with these subs when new. Assuming they did, is anyone using spikes and is there a noticeable difference? I'm wondering if spikes with floor isolator discs on a wood floor would make a worthwhile tweak.
valinar
I have two REL Stadium subs. They do come with spikes but I didn't get them either as I bought them used. I am using Star Sound cones on mine and it made a noticeable difference to me and others listening when we compared them with and without. I am a Star Sound dealer but am not sure of the current status of the company, the owner has had health problems in his family. But the cones definitely tightened up the bass.
I don't know for sure but the manual talks about using the spikes as if they were included. I talked to Sumico about them and they were clueless, suggesting I talk to a dealer. As I understand it they not only import REL but now own the company so they should know if anyone did. They have fallen a long way from what they were in the old days when I was a dealer for them. The cones I mentioned have a matching cup available for wood floors.
The Strata originally came with spikes and Sumiko recommended to "not" use them. I don't with mine atop a sandbox.