Anybody have any good ideas on how to keep my sub box from moving around in the trunk? I always hear the darn thing sliding around in the trunk. Right now the carpet in the trunk is in a bunch next to the trunk opening.

I had that problem too. The carpet is all bunched up, but the box stopped moving around on me so I just left alone. The best idea I had was to drill some brackets on the box and then attach it to the donut cover, just make sure you dont drill into the donut.
Cheap, easy fix.

Doh bet that would suck when you get a flat. Boy though when I got a flat in my 88le trying to wrestle the donut from under the sub box really sucked. It was cold and snowing and was at the mall parking lot so no taking the box outa the car.

hey i got a great way for you to keep it from movin...i did it on mine...it doesnt look that bad....well the first thing i did was set my box in so the carpet was all nice and neat lookin...then i looked up after setting it in and saw this hook...its like behind the plastic piece in back....holds the seat or something...and i took some wire i had layin around and put it around the hook and i wired it around hte screws on my cap that ihave inbetween my subs on my box....now you probably don't have a cap mounted inbetween yoru subs so you could run the wire all the way around the box i suppose...and then i looped it a couple times and then tied it and shoved the wire behind the plastic piece....really hard to explain...ill get pics some time...good luck...

I didnt do this on my install but my friend did and it works great. What you can do is put velcro on the bottom of the box and anchor the back of the carpet. It will hold your box in place and your carpet wont move to the front of your trunk.
What I did was just put a small metal bracket in front of my box screwed into my spare cover.

Yep. That'* what i did with the velcro. First, I got a large piece of plywood from Home Depot and cut it custom to my trunk, i put the carpet over it and drilled some screws along the perimeter of the carpet, so now the carpet doesn't bunch up. Then I bought some heavy duty velcro and line the bottom of the box with it, centered it on the carpet and viola! Problem solved.

aren't any of you guys securing your boxes for theft reasons? that'* what I"m mainly worried about. Maybe I'm paranoid. For the Riv when I install the subs I was planning on building a false wall for this reason. totally stealth.

Hehe you sound like my friend. He took steel straps 5 to be exact and strapped them over his box thru his trunk and bolted them to his frame. Needless to say his car got broke into 3 times and nothing got stolen. If he did that to his subs you dont wanna ask what he did with his HU.

actually....lol
I think it would be a good tip!

skateboard griptape no actually do the velcro idea it works miracles