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 Sedan, 5-Door Hatchback
These are researched envelopes, not a guarantee. Measure your own vehicle — the numbers here tell you what to expect, not what you have.
| Location | passenger side cargo area (hatchback) or trunk (sedan) — genuinely different spaces by body style |
|---|---|
| Outer bounding box | No independent trunk/cargo WxH found — hatchback product proxy: single 10" sealed, 500W RMS custom-fit |
| Known obstructions | Body style matters more than most vehicles here — sedan trunk and hatchback cargo area should not be treated as one uniform shape |
| 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" sealed, 500W RMS (hatchback-specific) |
|---|---|
| Box type | sealed |
| Location | passenger side cargo area (hatchback) or trunk (sedan) |
| Subwoofers | 2x10" ported, dual 4" ports |
|---|---|
| Box type | ported |
| Location | trunk/cargo area |
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 | 6.5" — same size across both sedan and hatchback body styles. Real, confirmed on the Sony 10-speaker premium system: 6.5" woofer PLUS a 1" tweeter in each of all 4 doors (not just front) — a real, complete component layout, not a simple coaxial. |
|---|---|
| Known obstructions | None specifically documented |
| Adapter bracket needed | unconfirmed |
| Tweeter | Front doors (in-door mount, not A-pillar) — real, named OEM replacement part exists (eBay: '2012-2018 Ford Focus Front Left Door Tweeter Speaker'). |
| Factory speaker size | 6.5" (sedan) — same size confirmed consistent throughout this generation. Real, confirmed: Sony 10-speaker system's 1" tweeter-per-door layout extends to rear doors too. |
|---|---|
| Adapter bracket needed | unconfirmed |
| Tweeter | Rear doors, in-door mount |
| Factory amp / premium audio | Sony 10-speaker premium system confirmed: 6.5" woofer + 1" tweeter in all 4 doors, plus a 3.5" center-dash speaker with its own 1" tweeter (5 tweeters total). Base non-Sony trim breakdown not independently confirmed. |
|---|---|
| Adding subs without a head-unit swap | Confirmed straightforward — trunk-based builds don't touch the head unit |
| Head unit | No replacement needed |
Real specific data across hatchback and sedan: NVX custom-fit single 10" sealed for the 5-door hatchback specifically (500W RMS, passenger side of cargo area); a real custom dual-10" build (35"W x 15"H x 28"/25"D, dual 4" ports); Harmony single 12" loaded box (19.6875"W x 15.75"H x 12.5"/14.875"D, tuned 33Hz, 300W RMS — same enclosure family/dimensions as the Ford Fusion's Harmony box, likely the same generic product line reused across compatible Ford trunk sizes rather than confirmed platform-sharing).
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.