Got a question for you guys - I just installed some Pioneer 6x8 3 ways in the fron and Pioneer 2 ways in th ack. These speakers actually thump some pretty good bass. I put Dynamat around each speaker(just a small 1.38 square foot sheet). However, I am getting terrible vibration from the back. It seams to be the door panels that are making all the noise. Hae any of you guys soundproofed the doors and STILL getting the vibration from your panels? I am trying to figure out if soundproofing the doors will stop the panel from "jumping". Also, anybody have a solution to the cost of Dynamat? Any alternatives? Thanx

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2000 Ford F-150 Lariat Ext. Cab, Short Bed w/ Off Road Package & 5.4 Triton V-8, Husky Floor Liners, Putco Side Rails, Kenwood eXcelon KDC-X815 CD Receiver, 4-Pioneer 6x8's, Kenwood 6 Disc CD Changer

 

I have a '97 F-150 SC and my back drivers panel was vibrating. I did sound proof but that is not the fix. The fix is taking the panel off and looking at how they attached it to see if you can tighten it any or just deadening the panel somehow.

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Red '97 F-150 SC 4x4 off-road, 16" rims instead of factory 17"'s(borrowed from old '97 reg cab), BFG 265/75 16 all terrain T/A, K&N filter with modified air box, Flowmaster 40 with duals out back, Expedition center console, 3" rear seat lift, after market stereo seen at HTTP://members.sounddomain.com/red97,

 

I originally had the same problem. I did two things to fix the problem:

I added sound baffles behind the speakers, ordered them for 8$ from Crutchfield.

Then I ordered BeQuiet and applied to the entire door, I actually did the entire vehicle. the stuff was real inexpensive and worked great.

I think the lock mechanisms are where the vibration originates, the baffles eliminated that problem. You could also try some electical tape on the bars that operate the rear door locks.

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1999 F-150 XLT Supercab Black factory stepbars Flareside Sport Package Oxford White Full tint - all windows. Bug Shield CD player 17" wheels, K&N Air Filter Ford Soft Tonneau Cover Gibson Super Truck "Did it myself" Undercoating Herculiner, Image Tailight Covers

Stereo Mods:
Clarion Pro Audio SRC5752s mounted in the front, tweeters mounted above arm rests.
Kenwood KFC-577Cs mounted in the rear doors.
All speakers installed with baffles behind them.
B-Quiet sound dampening installed in all doors, three layers on rear wall, and entire floor board done as well.

"Freak on a Leash"

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The foam speaker baffles will help without a doubt. I had a problem with my door skins rattling also. My solution was to Ospho the inside of the door skins(a rust killer) then apply Herculiner to every surface inside of the door I could reach. Not only did this stop the vibration, but just about every other sound in the world. Truck sounds like I'm riding in a Lexus now. It will also never rust inside the doors either. Just don't seal up the drain holes at the bottom of the doors.

 

Dynomat or B-Quiet the entire door. Made
a world of difference on all four of my doors. That factory plastic sheet will thump
like a snare drum if you don't.

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1999 Lariat 4X4 SuperCab Flareside 5.4; Auto, Tow Pack, Offroad Pack, 3.73LS, Factory Step Bars, 17" Chrome Wheels, Oxford White/Silver, Graphite Leather, Airaid, SuperChip, ARE LSII Bed Cover, Alpine CDA-855/JBL AMP, Polk dX7's, K&N Filter, Custom cat-back exhaust.

Coming soon: Airaid