I no longer have a need for this platform because we are finishing the basement and building a dedicated theatre room. Platform dimensions are 82 x 43 x 4.5. Top is finish grade plywood. Frame constructed of 2X4's attached with glue and screws. Very solid!! Padded and carpeted. Carpet can be easily changed to match. Rope lighting around the base. Rubber isolation feet attached with approx. .5 floor clearance. Will work on hard floor or carpeted area.
I will sell with or without BK-LFE-KIT but would prefer with. Lol - no shipping, local pickup only
I had my chairs attached directly to the platform but its works just as well just resting on top. This set up will literally shake your brain to the point its uncomfortable (if really turned up) - so plenty or power and vibration.
The LFE kit sells on Amazon for $600 and my material cost was about $200. Spend a weekend building it. I am flexible on price - something fair. Let me know if you have any questions.