Does anyone happen to know where I can find information on the speaker systems offered in the Roadsters? The best I could find so far is the official site (Roadster Features and Specifications | Tesla Motors) that simply says "amplified 400 Watt 7-speaker sound system". I found a few threads talking about Model S systems on here, but can't find much technical about the Roadster. Specifically, I'm wandering about the Infotainment Group system in the 2.5s right now, but if you have information on earlier versions that could be very helpful if I end up with a different model than expected (or to others in a similar situation to mine). Specifically, I'd love to know: What is the power output and how is it divided between subwoofer and non-subs? The official site says 400w but doesn't stipulate if that is RMS or how much of that power is eaten up by the Sub. Where are each of the 7 speakers and what type (sub, woofer, mid, tweeter) and size are they? Specs, including mounting depth, would be great to know as well. From pics I can guess a mid on each side of the dash and a tweeter in each door. Assuming that I'm correct that there is one sub positioned behind the driver's seat, is there room to add another behind the passenger's seat? Is there any limitation in the amount of power you can draw if you decide to upgrade the system, or is it just a matter of how much range you're willing to give up? And are there any other limitations with upgrades that someone used to ICE cars may not think about? Thanks!