Imho you will get way more sound reduction - road noise included - from stick on sound deadener. Than you will with the mass backed stuff from acc. And if you want the killer combination Noico sells both stick on sound deadener and a much thicker stick on foam layer that @Chris used on his last Jeep.Isn't the mass backing similar to MLV? Does anyone have any specs as to how much mass backing is included in it?
As far as I understand it, what you're referring to as sound deadener, the adhesive sheets or tiles, is for eliminating resonance from the tub and sheet metal. It doesn't really do much to block noise coming from other sources like road noise.
That's what the MLV or mass backing is for, because the added mass is what absorbs and eliminates the noise coming into the cab. As far as MLV goes, I've only ever seen it in combination with a Closed Cell Foam layer, about 1/8" thick, between the MLV and sheet metal or body panels to decouple it from those and prevent the MLV from resonating with the sheet metal. Do you know what the underside of the ACC carpet is like, does it have anything like a foam layer to decouple it from the tub?
I used second skin sound deadener. Heatshield and acc essex carpet. And i can only hear the engine when im passing. Road noise is greatly reduced. As much as you can with a soft top. It made a huge difference in interior sound from road, engine or anything else.
The acc has a normal carpet backing thats a semi clear glue of some kind that holds the carpet fibers.
The thing i have not asked. Is what do you use your Jeep for? And what are your goals for carpet and sound deadening?
If you get your Jeep wet inside regularly. Id skip all sound deadening and just go for bedrug. If its a daily driver that you want to sound deaden and not necessarily go mud bogging. Id get the thickest carpet you can. And as much effective sound deadener as possible.
Even if you go with bedrug. And want to be able to take it out. Id cut heat shield panels that fit under the carpet. It will stay well enough. But you could also tack it lightly to the underside of your bedrug. For greatly reduced heat in the cab.
Again, while you have it out, use some sort of heat shield. The stock carpet had some around the trans hump. But better stuff can be had for cheap.
Heres the post in my build thread detailing my sound deadening, heat shield and carpet. Sorry you have to click on images. But its worth it if you decide to go that route. There are also pics of the carpet. It definitely fit better than what yours is. Id call acc directly and ask their advice.
Post in thread 'Ethel - Budget Restoration' https://wranglertjforum.com/threads/ethel-budget-restoration.23931/post-600682