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
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, through existing opening |
|---|---|
| Outer bounding box | 40"W x 15"H x 26"/29"D — the source gives TWO depth figures and does not label what distinguishes them (see known_obstructions) |
| Known obstructions | A FULL-SIZE spare tire is fitted, not a space-saver, and the source jokes about exactly that. The published figure is stated as the room available around it. UNLABELLED PAIRED DEPTH: the two depth values (26" and 29") are given without explanation. Do not assume this is the same top/bottom taper documented on the Ford Fusion. Measure your own car before cutting wood to either figure; design to 26" if you want one number to trust. |
| Usable volume estimate | 4.5 ft³ |
Suggested configurations for this vehicle, not prescriptions. Run the numbers in the Box Builder before you buy anything.
| Subwoofers | Direct 6-3/4" replacement in the factory rear-deck enclosure, plus a 12V-to-5V converter if the head unit is also being replaced |
|---|---|
| Box type | factory enclosure |
| Location | rear deck underside |
| Subwoofers | 1x12" sealed or ported in the trunk, factory sub location left alone |
|---|---|
| Box type | sealed or ported |
| Location | trunk |
| Subwoofers | 1x15" ported or 2x12" — 40"W x 15"H x 26"D supports it, and the full-size spare is already accounted for in that figure |
|---|---|
| Box type | ported |
| 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 | 6"x8" Ford — the same speakers as any Crown Victoria or Grand Marquis. Replace with same-size 6x8 or 5-1/4" in a mounting bracket. The factory speaker is held by four 5mm screws. |
|---|---|
| Known obstructions | Full door-panel removal, and the sequence matters: pry the top edge of the sail panel to release its clip and lift it out; pry the screw cover in the door release assembly and remove the Torx T30 beneath; release the power options switch panel from its front and side edges, lift and pull it forward to reach and disconnect its harnesses; remove the 7mm screw underneath it; then two more 7mm screws along the bottom edge of the door panel. Tools: panel tool, Torx T30 driver, 5mm and 7mm sockets, ratchet, extension. |
| Adapter bracket needed | Required only when downsizing to 5-1/4". |
| Tweeter | No factory tweeter. WORTH KNOWING FOR A COMPONENT BUILD: the source specifically calls the sail panel — which comes off first during door disassembly anyway — "an excellent spot for a tweeter if you're installing component speakers," and warns to take care of the panel while it is out. That makes a front component set unusually tidy on this car. |
| Factory speaker size | None — no rear-door speakers. Rear channels come from the rear deck. |
|---|---|
| Known obstructions | n/a |
| Adapter bracket needed | n/a |
| Factory amp / premium audio | The Marauder uses the same basic AM/FM/CD/cassette receiver found in nearly every Crown Victoria and Grand Marquis, but adds a dedicated 6-3/4" 5-ohm subwoofer and A SEPARATE SUBWOOFER AMPLIFIER. That amp is the thing that makes this car different to work on, and it carries a specific electrical gotcha documented under known_integration_products — read it before ordering a head unit. Everything else on the car is easy to reach, and the source notes no drilling or damage is required for a normal install. |
|---|---|
| Adding subs without a head-unit swap | Yes, and doing it this way sidesteps the 5-volt problem entirely — if the factory head unit stays, the factory sub amp keeps getting the voltage it expects. |
| Head unit | No replacement needed |
40"W x 15"H x 26"/29"D, and the source is clear that this is the room available DESPITE a full-size spare tire being fitted. Two inches taller and an inch or more deeper than the Crown Victoria/Grand Marquis figure for the same platform. Room for a box plus enough amplification for a serious system, or a smaller enclosure if you want to keep luggage space and a stock look.
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.