Rel Does Not Recomment Isolation Stands

I knew of a guy who lived in a van down by the river.

No footers or stands on mine and it doesn’t rattle the floor nor the walls. Wood floors on a wood deck 1st floor of a two story house. 

No footers or stands on mine and it doesn’t rattle the floor nor the walls. Wood floors on a wood deck 1st floor of a two story house. 

Full disclosure, I'm not hobbyists. I've produced subs, bass bins and horn loaded bass enclosures for over 45 years.. I've sold, traded and modified all kind of others manufactures price point builds.. There are FEW that come close to my crazy collection of designs. Not EVERY sub is for every situation..

Bottom firing SUB are kids stuff plain and simple.. I don't mean to hurt anyone feelings. The KIDS are even decoupling their bass enclosures in their cars. Mass loaded with springs on the top and bottom..

You cannot decouple a sub with a bottom firing driver if it is just hanging there. Without a butt plate or being in a slot, the floor is going to be a huge out of time passive radiator and the FIRST reflection point for the subs.

I didn't make the rules I just work with them and not try to defy what you cannot change. Everything vibrates no exception to the rule.
Direct the pressure away from the floor and decouple the drivers from the rooms surfaces.. IF any manufacture has a better idea I'm all ears..

If you want to make smooth even bass understand boundaries but the right ones, the walls more so than any. Different size or different distances from the wall vs the driver location.

Regards

Regarding REL subs what they say for their , or any down firing sub, makes sense.  But not for other subs perhaps?  Re Harbeth, there are two approaches to vibration / energy make something heavy so it doesn't vibrate, make it light so it does.  Harbeth use the later approach.