Montana Big Sky 3575RL Subwoofer?

[stiles watson]

Your floor plan is similar to the 3670, kitchen and dining reversed. My stereo is in the center of the double width slide in the overhead and the speakers are at the ends of it housing the subwoofers. There are two additional speakers in the ceiling of the bedroom. My model is the same year as yours. The CD changer is a Samsung. Since I, too, an a second owner, I don't know whether this is original equipment. This probably no help to you.