Floorstanders on wood floor, help


Here's the setup:
- suspended wood floor, joists accessible from below
- jute carpet pad, very dense
- carpet, very dense/tight pile
- B&W N803's

We want to eliminate bass bloom while preserving attacks and PRAT. Here's what we've tried so far...

Nothing, flat on the carpet...
soft attacks/PRAT plus lots of bass bloom; worst of both worlds

Speakers on sorbothane footers on wood boards...
eliminated bass bloom but killed attacks/PRAT; deadly dullness

Spikes long enough to pierce carpet/pad and reach the floor...
great attacks/PRAT but enormous bass bloom; coupling to a 13 x 17 x 8 bass drum is not the right idea!

Spikes just shorter than the carpet/pad thickness, so not quite touching the wood floor...
great attacks/PRAT but still annoying bass bloom on some recordings; best we've tried so far, but could be better

Any ideas to preserve attacks and PRAT while controlling bass bloom? TIA.
dougdeacon
TWL said to use Sistrum platforms. I agree and I use Sistrum Platforms under all my audio devices. Robert will have a particular one to take care of your speaker needs. Tom
A bit of a late response but the Aurios/concrete slab system has worked great for me. I have pictures and a description of and easy way to put them togther in "my system"

Stuart
UPDATE: since the previous post we've upgraded our power amp from a fifteen-year-old SAE A205 to a new c-j MF2500A.

The changes were manifold, huge and bloody (financially anyway). The point of mentioning this here is that this upgrade fixed the problem this thread addressed. The MF2500A controls the woofers while increasing slam *and* improving bass musicality in every way, quite a feat.

Heavy bass passages still vibrate the floor, more than ever, but this now has little or no effect on the music because there is no more uncontrolled bloom from the speakers. The proof is that we now clearly distinguish the primary sound of an instrument from the secondary sound of its hall decay. Importantly, this is true for even the largest and lowest-pitched instruments like bass drum, organ, tuba, etc.

We'll still try the tweaks all you helpful people suggested (because everything matters) but a special "thank you" goes to Cdc for thinking outside the box. He hit the nail on the head.