Box under seat for two type r 12s

[onion21]

Hello.

I have a 2008 GMC sierra 2500HD Crew cab with a probox and a single 10 in it under the seat right now.

I was wandering.. If i raised the seat 3-4" and built a custom box with the added height, would I have enough cubic feet for the 2 type R 12's in a ported box? I think the probox I have right now has around 1' of cubic feet. If the box was perfectly rectangle with the added 3-4" It would be around 3.7 cubic feet of space, so I am thinking that with the humps and slopes figured in there, it would be pretty close to 3. Is this enough for the 2 type r's?

Also, I already have 1 kicker kx750.1 that i'm using on the single 10". My plan was just to buy another 750.1 and run 1 amp per sub. I know the subs call for 1000w rms, but would 750 each be enough, or should i sell the 750 i have and get a 2000w amp? If so, what do you recommend?

Click to read more...

 

[shammyhavik]

that box would definitely work with two type r 12's. if your gonna run 1600+ rms you need electrical upgrades like 0 gauge OFC wiring for power, ground, batt to alt, engine ground, and a couple other i'm missing. good amps include SQ2200D with over 2k watts of clean power.

type r 12's can take around 1100-1200 if tuned right with good electrical. but like i said that wattage may require even a new agm 110ah battery or 240amperage alternator

 

[onion21]

My truck has 2 batteries already, and I believe it has a high powered alternator in there that comes with the snow package or whatever, and I was planning on doing the big 3 anyway.

 

[shammyhavik]

Good stuff. What r you gonna tune the port to?

 

[onion21]

I have no idea. I was going to have a shop build the box for me. Suggestions?

 

[frasierraheen 10+ year member]

I have a 08 Silverado crew cab and i have 4 cadence s2w8's under my rear seat firing forward, my seat is slightly rised about 1.5 inches, and protrudes forward, after port and sub displacment they see 3.7cuft at 34hz. Sorry so long but with being said you can pull 4cuft seal.