I have two speakers on each side up front (one each on the front doors and one each right inside/against the outside mirrors.
And two behind the rear seats. no subwoofers under the front two seats.
I checked the specs and the 6 speakers are standard for the 320 however the "standard" for the 328i is the hifi 10 speaker system.
I thought the 328i has the 10 speaker system as a standard and an optional Logic 7 upgrade with 13 or so speakers.
Appreciate your responses guys.