Mass-loading subwoofer


I have a Rel G1 MK2 subwoofer (108#) that sits on an Auralex Great Gramma V2 platform (300# limit) and I think that I want to mass-load it.
The question is mass-load with what and, how much weight?

I’ve been looking at (for instance) a box of granite/marble slabs etc. from Lowe’s that are still in the box and strapped, or bags of steel shot from sandbags.com etc. on Diversitech pads.

Would those options “rattle” etc?

I know that the obvious answer is to experiment but I really would like suggestions first and there seems to be surprisingly little information on the subject anyplace.

 

Thanks!

bacchus1234

Jl1ny- Rel Special Carbon? That’s with a down-firing passive right? 
 

To be honest, I got the Auralex for my previous Rel (S5/SHO) which had the down-firing passive and it greatly improved it. I’ve never actually experimented without it with the G1 though. 
 

 

@curiousjim 

You wouldn’t happen to have a picture? 😁

I have a 42 pound curling stone on my REL 7i. Not sure it makes any difference, but it looks good.

Sorry for the slow response, I was traveling. I had hoped to post a picture on my return, using my PC to navigate the Byzantine image posting process on this forum. Being unwilling to set up a new account on an image hosting site for one picture and not having success with the copy/paste solution, I throw up my hands. 

 

 

 

@curiousjim 

You wouldn’t happen to have a picture? 😁

I had to set up a picture service for another post, so circling back on this request. 😀