I also count seven and cannot find any site that explains the speakers. Have you found out the answer.
Lol I know it's been 5 years and I just had this problem with my 13 SRX. You prolly don't have it anymore but 4 on the bottoms of each door- 2 on the front pillars, 1 center dash near windshield, a sub by the spare and 2 on top of the liftgate
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