I have a truck and plan on making a custom enclosure for my sub (12" ID Max v3 running off a JL 1000/1) in the console of the truck, with the sub firing towards the front of the cab. The enclosure would be made of 1" MDF to the correct volume (I have a huge console area, correct volume isn't a problem, I also have plenty of room to clear the heater and other things) and a lot of dynamat covering it to dampen vibrations to the console, and the outside of the actual console will be fiberglass. Has anyone had a sub in this location and had good results? I'm thinking the imaging will be good due to the sub being in front instead of behind the seat, plus it gives me room behind the seat as the only thing back there will be the amps on a custom amp rack. Any possible issues? By the way, my components are going to be Diamond HEX series and will be mounted in kick panels, if that changes anything, and I will have additional tweeters up high (attenuated) to raise the soundstage. The components are running off a JL 300/2, with the tweeters running off the head unit.
3/4" MDF is sufficient, and it works fine. It's been done many times. Imaging isn't really an issue for a sub, but you want it aimed for best resonance. Keep in mind you'll need to mess with phase shift depending on which way you point that sub for ideal output. This is vital with the sub being so close to you where it'll be.