Ford Expedition Rear Door Panel Speaker Size

Additional Notes

• The rear door panel location in the Ford Expedition positions speakers within the lower portion of the door structure, where the enclosure depth and surface area of the panel determine the maximum speaker diameter and mounting depth that can be accommodated.
• A rear door panel mounting location places speakers at roughly seat-level height, which affects the directional dispersion of sound toward rear passengers rather than toward the front cabin.
• The 6x8 inch oval format found in 1997 through 2017 model years occupies a larger total cone surface area than a round 6.5 inch driver, which increases low-frequency displacement capability within the same door panel cavity.
• The oval geometry of the 6x8 inch driver requires an oval cutout in the door panel, meaning the mounting template is not interchangeable with round speaker formats without an adapter.
• Full-range drivers, as listed for the 6x8 inch positions, are designed to reproduce a broad frequency spectrum from low bass through high treble within a single driver, making a separate tweeter unnecessary in those installations.
• The 6.5 inch round format listed for 2018 through 2024 model years is a standard circular driver, and the rear door panel in the Ford Expedition accommodates the round mounting flange and basket depth associated with drivers of that diameter.
• A 6.5 inch midbass driver is engineered to handle the lower-midrange and upper-bass frequency range, typically from approximately 80 Hz to 500 Hz, reinforcing warmth and body in the rear cabin audio field.
• When the 2018 through 2024 rear door panel specifications list both a 6.5 inch and a 1 inch position, the two mounting locations within the same door panel operate as a 2-way system, with each driver covering a distinct frequency band.
• A 1 inch tweeter handles high-frequency content, generally from approximately 2,000 Hz to 20,000 Hz, and the rear door panel mounting position for such a driver directs treble energy toward rear seat occupants at close range.
• Tweeters of 1 inch diameter have a compact footprint, allowing placement within limited surface areas of the door panel that could not accommodate a larger driver, such as an upper section or a dedicated tweeter pocket.
• The presence of a dedicated tweeter position in the rear door panel of the 2018 through 2024 Ford Expedition indicates the door panel structure includes a separate, smaller mounting cutout distinct from the 6.5 inch woofer opening.
• Full-range drivers listed as compatible with the 6.5 inch position cover the complete audible spectrum from a single cone, unlike the midbass type listed alongside, which is intended to operate within a crossover-managed frequency band alongside the 1 inch tweeter.