One of the first things I did to my jeep was gut the interior and install Dynamat Extreme and Dynaliner. I put Dynamat Extreme over the entire floor as well as inside all of the doors. On top of the floor lining of Dynamat Extreme I added a layer of Dynaliner. Both products reduce road noise, vibrations, heat, and keep your sound inside the vehicle.
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After doing all of the sound insulation I started the stereo upgrade. I used the JL Audio Cleansweep and summing module to get the signal out of the factory headunit and send to the amps. The amplifiers I'm using are the JL Audio JX360/4 and JX1000/1D. I am using JL Audio C5 components front and rear with ZR series tweeters. All of this is powered off of a 64gb iPad mini. I don't have a picture of the sub but its a single 10" JL Audio 10W7 in a JL H.O. box.
EDIT: I no longer have the stock sub, I traded someone for a factory sub delete panel
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After all the stereo upgrades, Dynamat, and as long as its a high quality mp3 I have crystal clear music no matter the volume. There are no annoying rattles from the bass like what you hear on the honda civics with the trunks rattling.