The Saturn Relay rear location accommodates a 6x9 inch speaker size across all listed model years. Full-range units represent the compatible audio system type for the rear position. These specifications cover the 2005 to 2007 model range.
A single driver that reproduces bass through treble without a separate crossover network. It is the simplest replacement option and is common in factory audio systems.
Additional Notes
The rear speaker location in the Saturn Relay accommodates 6x9 inch drivers across the 2005, 2006, and 2007 model years.
A 6x9 inch speaker has an elongated oval cone surface area larger than a standard 6.5 inch round driver, which increases low-frequency displacement capability within the rear enclosure space of the Relay.
The greater cone area of a 6x9 inch driver allows the rear location to reproduce bass and upper-bass frequencies with more efficiency than smaller oval or round formats installed in the same position.
The rear placement of these drivers in a vehicle like the Relay positions the speakers behind or beside passengers, which means the larger 6x9 format contributes to filling the cabin with low-to-mid frequency energy from a rearward source point.
Full-range is the sole compatible speaker type listed for the Saturn Relay rear location, meaning a single driver unit handles the entire audible frequency spectrum from low bass through high treble without a dedicated crossover network splitting those signals to separate drivers.
A full-range driver in a 6x9 inch format typically incorporates a whizzer cone or a small tweeter element at the center of the main cone to extend high-frequency response, compensating for the large cone's natural roll-off at upper frequencies.
The 6x9 inch full-range configuration in the rear of the Relay means no separate tweeter or subwoofer is specified for the location, concentrating the entire frequency reproduction task into a single mounted unit per side.
Rear speaker locations in minivan-class vehicles such as the Relay tend to involve panel mounting within side panels or rear quarter areas, where the available depth and surface dimensions must accommodate the physical basket depth and baffle cutout dimensions of a 6x9 inch driver.
The oval shape of a 6x9 inch speaker requires an elongated cutout in the mounting surface, and the mounting hole pattern differs from round speaker formats, making the baffle or mounting bracket geometry specific to the 6x9 footprint.