Always decouple, everything. You cannot be heavy enough or secure enough. The problem is timing. The floor, weather wood concrete or whatever folks use can’t isolate vibration unless it’s thick rubber, THICK rubber like the Kursk 3" thick.... Most people don’t have that type of isolation. 10-12" thick concrete will work. 3.5 or 5.5" is not thick enough unless it’s on friction piers. That is an expensive slab...
It’s better to use air bags, spring or pods. The better isolation you can afford the less the timing issues. Smearing is a PITA until you get rid of it.. Like magic!
Clean up the huge passive bass radiator from the floor walls and ceiling. Treat the standing wave issues in the room, you’re sittin’ in TALL cotton (as my Mom use to say) I use heavy curtains and two pocket doors that slide open on the back wall in one room. My ears don’t like to much pressure. OB servo subs really help. I use to use inner tubes on 2 12cf bass bins and set the feet in a pocket of 4" memory foam, 95% isolation.
On spikes they would have drilled holes in that 41/4" 80 year old concrete floor, close to 300 lb each.
I have a pair right now 250lb (12cf) with no driver holes yet. A pair of 21" Daytons, would act like pile drivers on spikes. Turn up the bass and it would leave concrete dust on the floor.. LOL
Regards
It’s better to use air bags, spring or pods. The better isolation you can afford the less the timing issues. Smearing is a PITA until you get rid of it.. Like magic!
Clean up the huge passive bass radiator from the floor walls and ceiling. Treat the standing wave issues in the room, you’re sittin’ in TALL cotton (as my Mom use to say) I use heavy curtains and two pocket doors that slide open on the back wall in one room. My ears don’t like to much pressure. OB servo subs really help. I use to use inner tubes on 2 12cf bass bins and set the feet in a pocket of 4" memory foam, 95% isolation.
On spikes they would have drilled holes in that 41/4" 80 year old concrete floor, close to 300 lb each.
I have a pair right now 250lb (12cf) with no driver holes yet. A pair of 21" Daytons, would act like pile drivers on spikes. Turn up the bass and it would leave concrete dust on the floor.. LOL
Regards