i have a single 12" L7 kicker in my 330ci and it sounds amazing, for one sub it sounds like two. i was going to get a L5 but it didnt sound as clean as the L7 plus for the difference i didnt think it was too bad. i got my sub off ebay for 200 including shipping and no tax. even with a 200x1 amp my L7 still sounds great but to open it up u have to have alot more power.
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