Does anybody know the stats of the non-DSP audio? Like RMS wattage?

More importantly, what are the sizes of the each of the speakers? I'm thinking of getting ahold of some GTO JBL speakers to make it sound better.

But that might not work as BMW probably has some propriatry plug for the speakers instead of two simple wires. Am I right?

Alternatively, I could invest $400 US in Bavarian Soundwerks' Stage 1 package which is supposed to give me 6 speakers to replace which they say is an easy installation.

If anybody can shed some light on this topic, I'd be greatful to your insight. I only want to replace existing speakers with better ones. I don't want to drill anything, I don't want to install amps or subs.

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