Great quality and sound!
Install is very straight forward. Seat risers worked great. Sounds great. Excellent build quality. Installed 2 rockford P3s with no issues. I did have to remove the rubber motor covers on the subs for clearance.
I purchased this box for my 5th Generation Ram and was well pleased.. It was perfect sounding. I have two Sundown SA classics, twelve inch dual voice coils installed and a Rockford Fosgate, R2- 1200.
My Rockford Fosgate P3‘s do not sit all the way down in the box going to need to make some type of spacer
That's a mid size sub that will easily fit. If you scroll down just a couple of reviews, there is a video of P3's playing that was uploaded by a customer. I'm not sure what you are doing wrong but it's definitely installer error if you can't get them to fit.
Best custom pre-fab box on the planet, hands down!