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: Regular Cab, SuperCab, SuperCrew
These are researched envelopes, not a guarantee. Measure your own vehicle — the numbers here tell you what to expect, not what you have.
| Location | underseat, SuperCrew |
|---|---|
| Outer bounding box | ~48"W (matches the widest real reference build) x up to 9.5"D at the deepest documented point x 7.25"H tapering to 5.25"H at the front — real full-width figure not independently confirmed beyond the reference builds themselves |
| Known obstructions | Real confirmed factory subwoofer bay exists in this cab (Goose Gear's seat-delete product explicitly reserves 'space under the platform for the factory subwoofer to be relocated' and offers a subwoofer-compatible 60% side with slots) — a custom box needs to account for this factory bay if the truck came with a factory sub option. |
| Usable volume estimate | 1 ft³ |
Suggested configurations for this vehicle, not prescriptions. Run the numbers in the Box Builder before you buy anything.
| Subwoofers | 1x10" or 1x12" sealed |
|---|---|
| Box type | sealed |
| Location | under rear seat |
| Subwoofers | 2x10" or 2x12" ported |
|---|---|
| Box type | ported |
| Location | under rear seat |
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 | 6x9" |
|---|---|
| Known obstructions | None specifically documented |
| Adapter bracket needed | unconfirmed |
| Factory speaker size | 6.5" (also cited as 6-3/4" — same practical size, SuperCrew) |
|---|---|
| Known obstructions | None specifically documented |
| Adapter bracket needed | unconfirmed |
| Tweeter | n/a — tweeter is front A-pillar only |
| Factory amp / premium audio | This generation used Sony premium audio on earlier trims/years, but REAL CORRECTION, 2026-07-22: B&O actually launched WITHIN this entry's year range, not after it — the 2018 F-150 was the first Ford vehicle in the US with a B&O PLAY system (developed with Harman), optional on Lariat+ and standard on King Ranch/Platinum/Limited by 2019-2020. this entry's 2015-2020 scope therefore likely spans BOTH Sony-only (2015-2017) and Sony-or-B&O (2018-2020) depending on trim — not purely pre-B&O the way earlier drafts of this note assumed. Real, confirmed Sony-specific detail: stock speakers measured 3.25" in at least one location, with the instrument-panel center channel at 3.5". B&O-specific speaker/tweeter specs for 2018-2020 trims of this generation were not independently researched — see the 2021-2024 entry for the continuing B&O system's own specs. |
|---|---|
| Adding subs without a head-unit swap | Non-premium trims should take a standard LOC tap fine. Sony-equipped trims need verification of a compatible adapter. |
| Head unit | No replacement needed |
Two real reference builds found: a CAD-designed dual-chamber box (2 chambers, 0.6 cu ft each) and a downfire wedge design (48"w x 9.5"d x 7.25/5.25"h, ~0.9956 cu ft, 2x4x11 port). Two different builders solved this differently — suggests real flexibility in this cab's underseat space, not one fixed answer.
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.