Hey all, new to the forum, poor atm, love audio, both home and car. I have 2 2005 model alpine type r's in a custom sealed and an rf 1001bd not hooked up. I bought a 4door 08 altima 2.5s last august, well rather leased now by my parents and i will purchase offlease since i grad college in december. I got the basic audio system and i am looking to beef things up in the future. I have heard excellent things about sound splinter and will probably get their midline 12" or 2 in the future with a sundown audio amp. None the less, now that my little spiel is done, i am wondering about passive radiators. Now i know these are quite common in higher end home theater and i have read some advantages and disadvantages of them over time. Now, i like the idea of passive radiators because they dont create port turbulence since there is no port and you are able to maintain more of a frequency range. Thats really all i know. Have any of you done passive radiators with your subs?