Im in the final stages of signing on a 2017 290 SDX OB... The build sheet on the boat lists "Premium Stereo Upgrade" which is supposed to be comprised of an extra 2 speakers and a subwoofer, totaling 6 speakers + the woofer.... This boat definitely does NOT have the extra 2 speakers but I'm pretty sure its got a subwoofer listening to the quality of the stereo. The subwoofer is hidden somewhere on the premium speaker package but I didn't go digging for it, I just know the system had a lot of bass to be coming from the 4 exposed 6.5" speakers. Has anyone ever seen anything like this from sea ray? Im confused as to how a boat could have an option on the build sheet that is clearly not installed (or possibly partially installed for that matter)?