I only count 7 in my new car (vert) w/HK. Two in the rear, one on each side (~ 4in. diameter). One in each front door panel, above the armrest (same size as rear). One tweeter in each door at side mirror level (1.5" I believe). And one in the center of the dashboard on top (below a square grill, ~ 4-5" square).
BTW it sounds awesome even with the top down!!!
2011 328i Convertible
: Mineral White; Oyster/Black Dakota Leather; Premium, Sport, Value; Sport Wheel w/paddles; Heated Front Seats; Satellite radio; HK Sound
2012 528i Sedan
: Titanium Silver; Oyster/Black Dakota Leather; Anthracite Wood; Comfort Access; Side & Top View Cameras; Cold Weather, Premium; Technology;
: Titanium Silver; Gray Leather; Premium, Sport; Fold Down Rear Seats; Xenon Headlights; Navigation System; HK Sound
2001 X5, 2009 528i