I'd like to add a small sub and amp to my '08 Versa without giving up cargo space in the hatch. So far I really like the Pioneer TS-SWX2502. It's a pre-loaded sub and box. According to Pioneer, the box measures 18-5/8" x 13-7/8" x 6". Will it fit under the driver's seat? My V does not have any electronic seat controls.