box for 4 - 18s bouncing

[BeachJoshua]

The preaching thing was a complete joke man.

[doubleD]

The preaching thing was a complete joke man.

ok, so we are cool....

[BeachJoshua]

im here to make friends ,not enemies

If there were a hug smiley I'd use it.

[cheese20323]

well if your box is jumping bolt it down to the floor.....But if it is wobbling then you have problem......

[superdave07]

woooaaahh hug and smiley is a bit far. maybe shake on it? I would like to see a video of this as well, hard to get if its not moving much. But you will start to notice you cant post much up without having some pics or vids to back it up. visual people on this site

[DirtyD78]

put some all thread through it with bolts on the out side, sound like your bracing came loose

[tejcurrent]

Damn you guys made me wet with that make-up.

Seriously though, you may or may not lose dbs from the box moving. If your 4 18s box is as close to the tailgate as mine was the tailgate has a direct impact on your tuning. This would also mean if the air from the port was flowing under the box when it lifted it could hurt your score.

At the back of your vehicle under your box there are two rings you can use to hook things to. You can remove the star bolt holding them in place and you will now have a clear view down to the ground. Then put your box back in place, drill out the hole from under the car into your box for location, then finish drilling from above so you don't mess up the threads on the truck. Bolt into those holes and you're done.

Why not bring a drill to a show with you, meter the truck at a set volume, bolt it down, then meter again and find out. SPL is finicky and it's impossible to say how different things effect your score. Some flexing may improve numbers oddly enough, though that's not the case most of the time.

[doubleD]

thanks guys,,,if anyone eles has any thoughts,,please input

[doubleD]

it just seems to me,,that if the box is moving up and down,therefor absorbing some of the woofers exscursion,and therefor reducing its air moving abillity..seems they wouldnt be moving to their full capability

[STEvil]

a flexing box will lose SPL, but its not going to be noticeable really without a wall and a highly reinforced SPL vehicle... maybe 1 db at the most.

You could put a threaded rod or two through from the face to the bottom with a steel plate (just a 4"x4" one or so, stronger than washers) on each end of the rod.. use a couple nuts to tighten it down a bit and you're done. Might need to raise the box with something like a 1/4" layer of mdf or plywood with a hole cut for the rod/nut on the bottom to sit in.