Don't get 4 12's with only 300.00. I don't think you'll be very happy because then you have to either build or have built a huge custom enclosure. I would keep it simple and get 2 decent 12's and have a really nice box built. Give your 12's around 2 cubes each and tune between 32 and 35hz with ~10 sq inches of port per cubic foot.probably 4 12"s.. kicker CVRs.. i know they arent as high quality as the boston, but i want something different and dont wanna pay out the ass... any suggestions?? i got about 300 to spend.. any ideas, deals?