Cant be deeper than 7" and the magnet diameter cant be bigger than 6.75"

Must be a 12"

And Ive already got the box and paid for it so it HAS to meet these standards

Its a downfire box under the seat of my crew cab silverado

Running an Sundown 1200 v2

please read noob guidelines

Cant be deeper than 7" and the magnet diameter cant be bigger than 6.75"

Must be a 12"

And Ive already got the box and paid for it so it HAS to meet these standards

Its a downfire box under the seat of my crew cab silverado

Running an Sundown 1200 v2

You're post provides nearly no information.

Since you already have the enclosure and are not willing to change the enclosure, details of the enclosure would be extremely pertinent information. Pretty much impossible to recommend a sub without knowing the enclosure it'll be used in.

A budget would also be very useful information. And by budget we don't mean "Something not too expensive, don't want to break the bank". An actual dollar amount.

Knowing your goals for the subwoofer's performance is likewise required in order to effectively answer your question. Is your focus primarily good sound, high output, a good mix of both, care about one but not the other?

i want a good mix of hard hitting and SQ

Its a down fire sealed box under my crew cab silverado seat about 1 cu ft of air space per sub.

I would love to get something for $200 a sub if not less.

But if theres a great deal out there Id be willing to spend about $250 each