212X sub rattling

[Buckeye Boater]

I have the factory sub in my 212x. I love the bass, but can't really use too much of it because it rattles a lot of the surfaces on starboard side. Has anyone explored how to mitigate this at all on these boats?

Thanks

 

[geohil]

Had the same problem. Went through and added a couple touches of 3M 5200 Silicone glue to the drink holder rings, did the same and tightened down the throttle lever bodies, also found that in the tunnel behind the sub the cables and wires were loose so I added a couple zip ties.
Only other thing I did was added a small chunk of rubberized horse mat (left over from wake flap) to the bottom of the small storage compartment just aft of the throttles. It help...but there is still a rattle. If you add a second sub to the other side it is way worse with the glove box close!
Do you have the problem of the sub actually backing off your throttles as they hit while playing underway?

 

[Mainah]

I enclosed the sub area with foam pieces, spray foam, lot of epoxy, and MLV tight and clean now. The expoxy was probably overkill amd for the hassl of painting many coats of that by reaching in the hole I am not sure worth it.

 

[geohil]

@Mainah - do you have any pics of that? I can't even imagine what a nightmare that would be to cut and spray foam into an enclosure? But if its worth it that may be a winter project??

 

[Mainah]

It was certainly a nightmare and no camera or phone was nearby given all of the sticky stuff I was working with. Went through many pairs of latex gloves. Lay down plastic and keep a garbage pail nearby if you do this. I originally intended to build a fiberglass enclosure working through the hole but that was a fail. In the end I have many inches of layered foam, spray foam, and epoxy holding all of the layers together and to the hull. All of that finished out by the one photo I do have with mlv. May not be fiberglass but it is not going to budge or leak air. As stated If I were to do it again I would just fill the large gaps with semi rigid thick closed cell foam sheet, then spray foam with maximum expanding foam, and finish with mlv. As for being worth it well don't think I will ever do it again. I would go free air sub or something like an infinity bass link or the wet sounds equivalent. Just way too much time and work the way I did it. As for how it sounds well it does sound clean, tight, hard hitting, with no rattles, and that is with only half of the rated power.

More in this thread
https://jetboaters.net/threads/detailed-2016-242-ls-1k-audio-upgrade.9400/page-3#post-291873

 

[Adrian @ JB Solutions]

I was thinking if I sealed up my IB, I would just cut in some PVC board to cover the large area, and then use expanding foam to fill in the rest.