Help on some details

Hello, I just sold my type-r 1224d in a 1.25cu.ft. sealed box powered by a mrp-m450. I had it setup for 2ohms. I want to get a new 1224d and I would like to ask what size box to get? I hear .85cu.ft. but rather ask. Also what amp? I'm looking at these two. mrp-m850 and mrp-m650. It's going in my toyota pickup xtra cab.

did you like the way the old system sounded ?

Yea. I had it in a litle coupe, in the trunk.

did you like the way the old system sounded ?

Any suggestions?

well, it will typically sound louder in a small truck cab than in a car trunk. Trunks are the hardest to get loud.