What y'all guys think alpine type r 12 with custom box that I'm gonna build this weekend to fit in middle of back seat with a mxp500 alpine amp That I got to order tomar. Gona bed liner entire box in and out

 

Is it going under the back seat or on the floor in front of the back seat?

I squeezed a 10" JL w3v3 in this fox acoustics sealed down fire box. It sounds clean and tight and there is not a single rattle or unwanted vibe from this setup..

 

No it's gonna sit in the seat in the middle speakers needs 10 inches of mounting depth