What we researched for this specific generation: where an enclosure actually fits, what the factory speakers are, how the factory audio is wired, and which real builds and commercial products exist for it. Confidence badges say how well each figure is sourced — this is research, not manufacturer spec.
Body styles covered: 4-Door SUV, L (extended length)
These are researched envelopes, not a guarantee. Measure your own vehicle — the numbers here tell you what to expect, not what you have.
| Location | cargo area (shared platform with the Ford Expedition; the makers' published cargo volumes differ slightly) |
|---|---|
| Outer bounding box | 51"W x 15"H x 24"/30"D below side ledges — same as the Expedition 2007-2017 page |
| Known obstructions | None specifically documented beyond what's noted in the Expedition page |
| Usable volume estimate | 8 ft³ |
Suggested configurations for this vehicle, not prescriptions. Run the numbers in the Box Builder before you buy anything.
| Subwoofers | 1x10" sealed (direct-fit Stealthbox, same as Expedition) |
|---|---|
| Box type | sealed |
| Location | factory subwoofer location, zero cargo loss |
| Subwoofers | same custom large-build options as the Expedition page — behind 3rd row, up to 15" subs |
|---|---|
| Box type | sealed or ported |
| Location | behind 3rd row |
Sizes and depths below are what research turned up for this generation. Confirm against your own vehicle before cutting or ordering — trim levels vary.
| Factory speaker size | 6x8" or 5.25" woofers — same platform family as the confirmed-shared Ford Expedition of this era. **CAUTION**: the '1.570" tweeter' figure in the shared Crutchfield retailer guide covering both vehicles is the Ford Expedition's OWN door-panel tweeter spec — NOT independently confirmed as the Navigator's own tweeter. Direct research for the Navigator specifically found a DIFFERENT, named tweeter: a THX-branded 2.194" unit, mounted in the REAR PILLAR (not the door, not the A-pillar) — attached to its grille with heat-fused clips and secured to the pillar trim with 4 Torx T10 screws. Since this is a genuinely different location AND size than the Expedition's door tweeter, do not assume the two vehicles share identical tweeter specs despite the confirmed shared cargo/subwoofer platform. |
|---|---|
| Known obstructions | None — Crutchfield describes this as one of the easier vehicles to upgrade |
| Adapter bracket needed | unconfirmed |
| Tweeter | Rear pillar (Torx T10 mounted, heat-fused clip grille) — a genuinely different location than the door-mounted pattern seen on the shared-platform Expedition |
| Midrange | n/a — no separate midrange confirmed; this appears to be a 2-way woofer+tweeter system with the tweeter relocated to the rear pillar rather than door-integrated |
| Factory speaker size | 6x8" or 5.25" (same platform family) |
|---|---|
| Known obstructions | None specifically documented |
| Adapter bracket needed | unconfirmed |
| Tweeter | n/a — the real THX tweeter is rear-pillar mounted, not in the rear doors themselves |
| Factory amp / premium audio | Lincoln's brochures: the THX II Certified 5.1 Surround Audio System is standard on the 2012 Navigator — 14 speakers (including an 8" rear subwoofer), 600 watts and a 12-channel amplifier; the 2016 brochure still lists the '14-speaker THX II Certified Audio System'. 2007-2011 and 2013-2015 not confirmed. |
|---|---|
| Adding subs without a head-unit swap | Straightforward — same factory-location bolt-in pattern as the Expedition |
| Head unit | No replacement needed |
CONFIRMS PLATFORM-SHARING with Ford Expedition for this era: identical cargo dimensions found — 51"W x 15"H x 24"/30"D below side ledges, matching the Expedition 2007-2017 page exactly. JL Audio sells the SAME Stealthbox part number for both Navigator L and Expedition EL. This is the second confirmed cross-brand platform-sharing case in the catalogue (after GM's Tahoe/Yukon/Escalade/Suburban family). Lincoln's and Ford's brochures print different cargo volumes for the two: Navigator 18.1 cu ft behind the 3rd row and 54.4 behind the 2nd, Expedition 18.6 and 55.0 (the long-wheelbase L and EL are both 42.6 behind the 3rd row). So the cargo areas are not identical in the makers' figures, even where the measured 51 x 15 x 24/30 in and the shared JL part agree.
Outside links. Some are commercial products, some are owner builds posted on forums — the label says which. We do not endorse any of them.
Each link opens the tool with this vehicle already selected.
Measure your own vehicle. Trim levels, factory subwoofer options, and mid-generation changes all move these numbers, and a box cut to a researched figure that does not match your truck is wasted wood. Where a badge reads Unconfirmed, treat the value as a starting point for your own measurement, not as an answer.