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How To Quiet Down Your Wrangler JL Interior

Installing hardtop insulation panels on your Jeep.

Jun 24, 2020
As most of us know, Wranglers are not the world's quietest vehicles to ride in, despite being impressively civilized these days. And while most of us would gladly take the tradeoff of increased sound levels for the experience Wranglers can give us on the trail, nobody is going to say no to a quieter interior. The Wrangler JL does use increased sound deadening over the JK, and is quieter overall; however, the top is actually thinner, making wind noise noticeable and sound insulation a must-have upgrade.
Starting with our AEV-equipped 2020 Jeep Wrangler JL Unlimited, we were looking for a product that looked premium, was durable and easy to clean, and would lower our interior sound levels. With a huge selection of products on the market, including the ones you can now order from the factory, choosing the right option can be overwhelming.
After a significant amount of research, we settled on Boom Mat from Design Engineering, Inc. (DEI). DEI is a company that was formed in 1995 and specializes in thermal and acoustic control products, plus the company's Boom Mat kit has received a ton of good reviews for performance and fit and finish.
Photo 2/10   |   DEI's 9-piece kit comes complete and ready to install. The CNC cut panels are precise. Boom Mat panels are -in thick, except for the freedom panels, which are 1-inch thick. The freedom Panel pieces are also beveled for a good fit.
Boom Mat insulation panels are constructed from a high-quality, marine-grade acoustic foam that resists mold and mildew, and the leather-look version we installed is easy to clean up with just quick wipe down from a damp rag. Boom Mat's Jeep Wrangler JL 4-door Sound Deadening Headliner kit comes in nine CNC-cut, peel-and-stick pieces, including the hardtop's central depressions, which aren't covered by all kits. And in addition to leather-look, there are versions available in black, gray, and white.
DEI claims a 3-4db improvement in interior sound levels on a stock Wrangler, and we saw a similar improvement with our lifted JL on 37s. Using a sound meter, we recorded the sound level at idle, 55, 65, and 75 miles per hour, with the pre-DEI numbers of 44db, 67db, 68db, and 72db, respectively. After installing the panels, we re-tested and saw a noticeable improvement. At idle, sound volume dropped to 42db (-2db), with 63db (-4db) at 55mph, 66db (-2db) at 65mph, and 69db (-3db) at 75mph. As an unexpected benefit, the factory premium audio system sounded much richer to our ears, and we no longer had the slight echo when talking to other passengers. Clearly these panels work, and with less tininess to the interior, our JL is a nicer place to spend those hours on the highway between trail rides.
Installation was easy enough for us to do in our front yard, and we are incredibly pleased with our decision to go with the DEI Boom Mat panels, especially with how nice they look.
Photo 3/10   |   Here is a close-up view of the leather-look panels. Not only are they easy to clean by simply wiping them down, they add an upscale feel to the interior of the Jeep.
Photo 4/10   |   The first step is to remove the Freedom Panels from the vehicle and place them on a soft surface, like a blanket, to prevent scratching. We found that our synthetic front lawn was ideal. Once the hard top is removed, wipe it down to remove any surface contaminants and dust to promote adhesion of the panels.
Photo 5/10   |   DEI includes filler strips in the kit that will fill in the recesses between the roof's molded-in ribs. With the filler pieces in place, it minimizes the contours of the underside of the top from showing through. DEI's instructions and packaging make selecting the correct strip for the intended location a snap.
Photo 6/10   |   Here you can see the main hardtop portion with the filler strips installed.
Photo 7/10   |   Next, we grabbed our first panel and peeled the backing revealing the adhesive side. We found it is best to apply with one edge seated and work your way to the other edge, preventing the adhesive from catching the side of the panel and adhering prematurely. Once installed, apply pressure by hand to get the panels to seat.
Photo 8/10   |   DEI recommends allowing the panels to sit on the top inverted for 25 minutes to allow the adhesive to set. While the ribs were somewhat visible at this stage, by morning they were nearly invisible as the foam had time to expand.
Photo 9/10   |   With panels secure and in place, we reinstalled the tops and enjoyed our quieter interior. Not only did we see a noticeable drop in background noise, but the stereo has a fuller sound to it, and the interior looks amazing!
Photo 10/10   |   010 How To Quiet Your Wrangler Jl

Source

Design Engineering
(800) 264-9472
www.boommat.com

Sources

Design Engineering Inc.
Avon Lake, OH
800-264-9472
http://www.designengineering.com

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