Can anyone tell me what the trunk's well dimensions are? (I guess this is either for storage or for the "feet" of kids in the rear-facing seats?) I am curious because I am thinking about retrofitting a subwoofer back there (can't measure myself - I'm 13,306 so won't get my S until April/May/June timeframe). It looks big enough to put at least a single 12". I think this may sound incredibly great, moreso because we already know the shape of the trunk's causing a pressure buffering effect lol I know the S has a 12V battery and the terminals are behind the nose cone. I am not worried about the power draw since even a 1kw amp's draw is pretty much insignificant to the size of the 85kwh battery. (as discussed in this thread http://www.teslamotors.com/no_NO/forum/forums/it-possible-connect-subwoofers ) . Plus I think amp/subwoofer technology has advanced so much that it really doesn't take much to get awesome bass using very little power. (Kicker IX? it's been a while since I installed a few car audio systems...gotta look around. brief search shows these Kicker IX's may be pretty good). I also know there's been a few Model S 12V issues, but assuming those kinks get worked out (if they aren't already in the latest software), it still may be worth putting a 1 farad cap back there too to store enough energy so the sub's amp hits the cap and not really the 12V directly. The remaining questions I can think of are 1) how to run the power/ground lines from the 12V terminals to the trunk 2) how to splice into the audio output lines ( I haven't seen any info on the car's audio system ... where is it even located? ) 3) will installing this void the 85kwh battery's warranty?