Should I decouple my subs too?

I use a Sub Dude under my REL R305.and it made a huge difference in my set up.   Works well,  I put one under my Dad's sub and the bass is great and it doesnt rattle the rest of his house.   He kept playing movies too loud and it was keeping my mom up , so I went by one day with a Sub Dude.   He didnt even know I put it under,  i set his trims correctly and boomyness was gone.    Great product 

I’m not familiar with Sub Dude but will definitely check it out. Thanks 

I tried my GAIA II footers from my GE Triton Refs on my SVS PB2000 pro sub and it made a big difference for the better. I put the footers back on my speakers and bought a set of SVS footers for the sub. It’s almost as good which is good enough for me especially when the SVS footers were $45.00 compared to $299.00 for the GAIA.

My house is 100 years old and my floors are wood suspended. As the sub is on the second floor of the house, everything on the first floor would vibrate before adding the footers, not so now.

@ stereo5. Were you able to bolt the Gaia ll footers to your sub or just set the sub on top ? My REL S-510 subs only have 2 small screws on the end of each rail so the Gaia footers wouldn’t be able to bolt tight to the sub. I ended up ordering the OREA Bordeaux footers ( the style recommended by ISO acoustics) for the subs and Gaia footers for the mains and surrounds on stands. 

@ronboco --

...  I just got off the phone with the REL guy and he said NOT to put footers on the subs as they perform better coupled to the floor.

Depending on the stability of your hardwood floor I'd nonetheless go with his advice; couple, not decouple your subs to the floor. The REL guy has no interest in promoting or selling an(y) accessory that will likely have the product he actually does sell perform differently/worse than what and how they intended. Nothing conspicuous about that.

With my own subs (+200 lbs. each), also placed on a very solid hardwood floor, I've placed a "wedge" (actually it's a few mm's thick piece of hard plastic used for distancing tiles and such) centered under the front, bottom edge between that and the floor of each sub, that are otherwise placed directly on the floor. This stabilizes them completely so they don't make any rocking motions on their floor position, and also has upper, backside edge of each sub lean directly against the front wall. This fully secures them to "fire" off bass in an unwavering fashion, regardless of SPL. 

In your case with REL subs I gather they have some kind of rubber footers, and I wouldn't deviate from that as these will couple the subs quite effectively to the floor. That would be my outset. If on the other hand you feel the REL's (how many?) sound too boomy and undefined, having tried out a range of positions, then, and only then would I consider decoupling them. Just my $0.02..