Dayton SPA500 - 540W max into 4 ohms. Keep in mind the size of this box affects the amount of power required by the driver, and is actually a little more than is required, but I bought the parts first and changed my desgin later, to the 24" instead of 20" box.
As for my totals, I was going to do them this weekend but I guess I will try and figure it out now. I will round to the nearest $5 for ease.
- Parts: Trio12 driver, 2 PRs, plate amp, floor spikes, and all mounting hardware: $600 including shipping and taxes.
- Sheet of MDF: $40
- Glue sticks: $5
- Gorilla Glue: $5
- Primer: $10 (See Note 1)
- Duratex Cabinet finish: $80 with tax & shipping
- Say $10 for shop supplies (Carpenter's Glue, wood screws, sandpaper, nylon nuts, etc)
- Weatherstrip: $10
I also joined the wood hobby club specifically for this, so my personal total would include:
Membership to wood hobby club: $75
My grand total: $835
Note 1 = Primer is not required. I wasn't sure how much duratex would be needed, but there is about 3/4 gal left over and it is self priming, so I could have used that instead.