ya, many people on this forum will make plans for you for $5-$10 save the money and buy some front stage speakers perhaps? and btw i was planning on buying a SI Mag and was going to run it off only 500watts TireFryr on this forum works for them and this is what he sent me
"Well, it really will all depen on your musical tastes and the application of the product. I was running the newest MAG in my truck in 1 cubic foot sealed with only 250 watts and it was loud enough within the small confines of the truck to provide headache type levels. I take it you will be running your in the trunk, and are throwing more power to it, so a larger sealed enclosure will be a good all-around enclosure, about 1.3-1.75 cubes. Venting will get you some increased output, but only in a certain frequency range.
Very rarely do I really even use my sub. I set my car up for a strong midbass and I will generally let that handle everything as low as it will go. If I need to cover the bottom octaves or just want to crank it up, I will turn the sub system on and go from there.
If you're looking for a good daily driving enclosure, I'd suggest a vented enclosure anywhere from 2-2.5 cubes with about 30sq.inches of vent area and tune it between 28-33Hz.
It's an extremely versatile driver and will pretty much do whatever you need it to do.
Ryan"
the reason i didnt buy it, i got in an accident and f*cked my car up, so the system will have to wait a while.