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: 2-Door Coupe, Convertible
These are researched envelopes, not a guarantee. Measure your own vehicle — the numbers here tell you what to expect, not what you have.
| Location | trunk, flush rear-firing or standard box |
|---|---|
| Outer bounding box | No independent trunk WxH found — product proxy: 35.5"W x 14"/9.25"H x 13.25"D. Vehicle-specific enclosure catalogues; published box footprints are lower bounds on the cavity, not the cavity: NET Audio '2005-2014 Ford Mustang Sub Box Large Rear Fire Sealed': 33 x 22 x 16.625 in (as printed; axes not labelled), 4.27 ft3, trunk; two-piece design assembled in the trunk; SRQ Customs 'Ford Mustang 2005-2014 Subwoofer Enclosure': 36 x 18 x 12 in (as printed; axes not labelled), 2.5 cu ft for dual 12s / 1.5 cu ft for dual 10s, trunk, contours with the hump over the rear axle; small trunk opening needs three-piece install. Vehicle-specific enclosure catalogues; published box footprints are lower bounds on the cavity, not the cavity: Ground Shaker 'BLACK 10" DUAL SEALED SUB BOX, FITS 05-15 FORD MUSTANG COUPE': Height 13 3/4", Rear Height 10", Length 35 3/4", Top Depth 15 1/4", Bottom Depth 17 3/4" (labelled by Ground Shaker), 2.52 FT3 total; 1.26 FT3 per subwoofer, slides up against rear seat; Ground Shaker 'BLACK 12" DUAL SEALED SUB BOX, FITS 05-15 FORD MUSTANG COUPE': Height 13 3/4", Rear Heigth 10", Length 35 3/4", Top Depth 15 1/4", Bottom Depth 17 3/4" (labelled by Ground Shaker), 2.52 FT3 total; 1.26 FT3 per subwoofer, slides up against rear seat. |
| Known obstructions | Small trunk opening AND a non-level trunk floor make a standard flat box hard to fit without reaching all the way to the opening — same category of access constraint as the Camaro. |
| Usable volume estimate | 1.8 ft³ |
| Location | trunk, CONVERTIBLE (one owner's 2006 car — the 2010+ refresh and the coupe are not covered by this measurement) |
|---|---|
| Outer bounding box | 42" W (side to side) x 12" H (top to bottom) x 16" D (front to back), one owner's tape measure; trunk opening 27" wide x 14" front to back. Vehicle-specific enclosure catalogues; published box footprints are lower bounds on the cavity, not the cavity: Ground Shaker 'BLACK 10" DUAL SEALED SUB BOX, FITS 05-23 FORD MUSTANG CONVERTIBLE': Front Height 13 1/2", Rear Height 7", Length 31 1/4", Top Depth 5 3/4", Bottom Depth 13 1/2" (labelled by Ground Shaker), 1.30 FT3 total; 0.65 FT3 per subwoofer; Ground Shaker 'BLACK 10" SINGLE SEALED SUB BOX, FITS 05-23 FORD MUSTANG CONVERTIBLE': Front Height 13 1/2", Rear Height 7", Length 16 1/2", Top Depth 5 3/4", Bottom Depth 13 1/2" (labelled by Ground Shaker), 0.65 CUBIC FT.. |
| Known obstructions | The convertible-top well eats height — the owner notes the top-to-bottom figure "might be a few inches more in a coupe" — and the rear seats do not fold on the convertible. A 12"-tall trunk will not take the 14"-16.6"-tall boxes the coupe products in this page use. |
Suggested configurations for this vehicle, not prescriptions. Run the numbers in the Box Builder before you buy anything.
| Subwoofers | 1x10" or 1x12" (single-sub equivalent of the dual spec) |
|---|---|
| Box type | sealed |
| Location | trunk, flush/rear-firing to preserve amp room |
| Subwoofers | 2x12" sealed |
|---|---|
| Box type | sealed |
| Location | trunk |
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 | Base system: 6x8" (2005-2009 confirmed), also compatible with 5.25" via bracket. MORE COMPLEX finding on the premium Shaker 500/1000 tiers: real sources describe a genuinely richer 2-way door layout — a 4" midrange + 1" tweeter in the UPPER door, plus an 8" sub-woofer in the LOWER door — a distinctive 3-driver-per-door design on premium trims, NOT the same simple single-driver door as the base system. One source conflicts and describes the Shaker 500 as simply '6x8" front door speakers' — a genuine, unreconciled conflict (enthusiast forums themselves flag this as inconsistent). |
|---|---|
| Known obstructions | None specifically documented |
| Adapter bracket needed | yes for 5.25" |
| Tweeter | Upper door (Shaker system) — additional finding: a SEPARATE tweeter also exists in the A-pillar alongside a center-dash speaker, meaning the Shaker system may use dash+A-pillar+door tweeters together rather than just one location. Genuinely complex, multi-location tweeter architecture on this trim — not simplified to one spot. |
| Midrange | Upper door, Shaker-equipped trims only |
| Factory speaker size | n/a — 2-door coupe/convertible body style |
|---|---|
| Known obstructions | No rear doors on this body style |
| Adapter bracket needed | n/a |
| Factory amp / premium audio | Confirmed multi-tier system across this range: base system (simple 6x8" doors), and Shaker 500/1000 premium tiers with a genuinely richer architecture — 4" midrange+1" tweeter in upper doors, 8" sub in lower doors, 5x7" rear/package-shelf speakers, center-dash speaker, and A-pillar tweeter. Exact per-model-year trim availability not independently confirmed. Enthusiast forums themselves show conflicting specs for the Shaker 500 (6x8" vs. the multi-driver door layout above) — a genuine unresolved discrepancy. |
|---|---|
| Adding subs without a head-unit swap | Confirmed straightforward — trunk-based builds don't touch the head unit |
| Head unit | No replacement needed |
Specific dual-12" sealed box: 35.5"W x 14"/9.25"H x 13.25"D, 10.75" mounting depth. A real rear-firing alternative fits 2x8"/2x10"/1x12" flush with the trunk floor specifically to preserve amp mounting space, 10" mounting depth. DESIGN CHALLENGE flagged by builders: small trunk openings AND non-level trunk floors make a standard flat box hard to fit without it reaching all the way to the opening — similar in spirit to the Camaro's access constraint, worth the same kind of explicit installability check.
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.