Hello! I’m thinking about what kind of sound system I’m installing. I have a 2-way combo with 13 speakers in the front and a 16 coax in the rear door. I’ve already built in 2 subwoofers:http://www.alpine.de/…/…cm-subwoofer-2Ohm%2B2Ohm—4Ohm%2B4Ohm.htm and I want to get more sound out! A spectator said that I should install a Rainbow system (vehicle species). Can keep this up with a Bose sound system (which I’m looking for). I have an Alpine car radio.http://www.alpine.de/…/a580.det.CDA-9855R_CD–MP3–WMA-RECEIVER.htm Well, what do I want to spend… between 300 and 400 for front and rear speakers together, no more at all! What I like is the sound fullness of the Bose system, can I get almost such a volume with the Rainbows? Another problem: In the trunk is a 16er in the factory. Subwoofer installed as a double swinger. It would also have to be replaced, as it snaps (currently an alternative speaker installed)! Do you know anything else that I should consider? Why do I want to install the sub 16 at all? Quite simply: for kick basses the 30s Woofer are too big! Thanks for your answers!