It made a difference yes, but not a massive one. The REL is quite heavy enough as it is, but adding the extra weight to the top seems to tighten the bass up slightly.Originally posted by mw3cdj
Did the slab on top of the sub make much of a difference??
Got a paving slab or 2 in the garage , might give it a go a liitle later , if it works i'll get some More marble cut.It made a difference yes, but not a massive one. The REL is quite heavy enough as it is, but adding the extra weight to the top seems to tighten the bass up slightly.
Where can one get them?Originally posted by rags
Auralex Grammas work very well under subs.
Originally posted by martintyler
I would be lying if i said it definitely made a difference to the sound quality, if it has its only small.
Originally posted by magking
I have to agree with Martin.
I did'nt notice a huge improvement, but I have a hardwood floor and it reduces the vibration in the floor thats for shure. It also makes it easyer to move my subwoofer around and look very cool.
Originally posted by Mr Chefs Salad
I have an Auralex Gramma.
After using the gramma with my sub my observations are - No noticeable improvement in the sound quality .(I wasn't expect any - despite some wild claims)
The vibration and subsequently the noise from the sub travelling to the room below has been quite considerably reduced, although not completely. This was main objective.
I have a very old hardwood floor and using the gramma has definately proved beneficial. My floor definately rattles less as does the door adjacent to the sub (previously a very noticeable problem). For my room it has been a worthwhile investment as with less crap going on in the room sound quality has improved. If you have a carpeted floor it may not bring significant benefits.Originally posted by jrpavel
Where can one get them?
What about those little inverted cones on a concrete floor? Or furniture castors?
Finally I have little rubber feet for the speakers under my front/centre speakers which are in the first shelf on my AV stand. This improved the sound slightly, as well as minimising the heat effect from the receiver on the shelf below. Unfortunately the speakers cannot go on top of the stand because they would block the plasma picture.