More work. In testing yesterday, i heard a lot o air leaks from the drivers pumping. I don’t have carpet floors, i have hardwood.
Also if you noticed on last pics i turned the 2x4 around so it was 4" tall instead of earlier laying flat= 2". This was so the JBL’s under the seat would clear the seat frame.
This of course makes the sleds 2"+ taller. And i don’t like that, so i found a way to continue using them flat, or 2".
I rotated the JBL’s under the seat, so they clear the frame and fits up IN the frame.
And to seal the tubes better, i used speaker box fabric under the sled.
This also sloved the squeeking the tubes made against the wood sled.
And tubes back on. Not as symmetric, but purely cosmetic, and doesn’t show under the sleds anyway
And i will also use the same fabric, or a carpet under the sled, to seal against the floor.
A little more testing earlier today, these tings are totally iiiinsane!! The headroom is simply off the charts, 4 hz is like riding a horse, LOL!! That test was before i made todays mods, so there was a lot of blowing noises, LOL, as air escaped everywhere under and over the tubes, but there wasn’t any signs of the JBL’s giving in.
Funny note. At first i thought it felt very gimmicky and strange. Since i now have the JBL’s in correct downfiring position, the concensous is to have them in phase, so i did. But then i tried them inverted, and VOILA, there it was, it was like night and day, LOL. Also, they produce a lot more SPL than i thought they would, being so tiny "boxes«, LOL.