The M/L stereo is supposed to have 14 speakers, but I can only account for 11 of them (6 in the front doors, 2 in the rear doors, 2 in the rear barn door and 1 in the center of the dash). That still leaves 3 unaccounted for. Any ideas?

 

The rear door has 4 speakers. It's coaxial...a tweeter and woofer in one unit (each door). There's also a subwoofer in the cargo wall (passenger side).

 

Check out http://www.marklevinsonlexus.com/overview.asp?model=gx

 

Thanks all. Didn't see the subwoofer behind the folded up 3rd seat. The link is especially interesting.