2021-2025 Ford Mustang Mach-E 1st Gen — subwoofer box fitment

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 Crossover (EV)

Where a box actually fits

These are researched envelopes, not a guarantee. Measure your own vehicle — the numbers here tell you what to expect, not what you have.

Crossover Likely

Locationrear cargo area, lower well (behind 2nd row, under the removable cargo floor panel)
Outer bounding boxseatback-to-hatch length approx. 31-34 in, usable width between side walls approx. 42-43 in (forum-sourced measurements, not an official Ford spec)
Known obstructionsThe cargo floor panel itself is a hard height constraint -- owners report 5 in is about the tallest a box/enclosure can be and still let the floor sit in its lower position; taller boxes force the floor to stay in the raised position or get removed. The lower well normally holds the charge cable and a roll of paper towels/tool kit, which need to be relocated.

Starting points

Suggested configurations for this vehicle, not prescriptions. Run the numbers in the Box Builder before you buy anything.

Budget

Subwoofers1x10" powered/self-contained (e.g. JL Audio ACS110LG-TW1 class product), 5in max height to preserve the lower cargo floor
Box typesealed
Locationrear cargo area, lower well

Enthusiast

Subwoofers1x10" or 1x12" custom sealed enclosure, accepting the cargo floor stays in the raised position or gets removed
Box typesealed
Locationrear cargo area

Door speaker fitment

Sizes and depths below are what research turned up for this generation. Confirm against your own vehicle before cutting or ordering — trim levels vary.

Front doors Likely

Factory speaker sizeBase (non-B&O) system: not researched -- a go-parts.com speaker-size guide likely has this but blocked automated fetch (403), worth a manual check. Bang & Olufsen premium system (confirmed): 160mm (~6.3in) midwoofer in each of the 4 doors.
Known obstructionsunconfirmed
Adapter bracket neededunconfirmed
TweeterB&O system: 25mm (~1in) tweeters in the dash trim (2) -- not door-mounted on the front doors specifically. Base system tweeter presence/location: not researched.

Rear doors Likely

Factory speaker sizebase system. B&O system: same 160mm (~6.3in) midwoofer as front doors.
Adapter bracket neededunconfirmed
TweeterB&O system: 25mm (~1in) tweeters, 2 units, in the rear doors.

Factory audio integration

Factory amp / premium audioTwo distinct factory systems: base ("Select" trim) audio, or the premium Bang & Olufsen system (available on GT/Premium/California Route 1 trims) -- confirmed via a detailed community teardown (stereoguide.com, totallyev.net). B&O system: 4x 160mm door midwoofers, 1x 80mm dash-center midrange, 4x 25mm tweeters (2 dash + 2 rear doors), and a factory 6x9 subwoofer in the cargo area (boot).
Adding subs without a head-unit swapConfirmed straightforward -- real documented installs exist (JL Audio ACS110LG-TW1 powered 10in sub/amp combo, 5in tall to preserve the lower cargo floor position; custom fiberglass builds into the spare-tire-well recess). As an EV, standard 12V gas-car LOC-tap assumptions may not directly apply -- not independently verified whether Mach-E has the same EV-specific electrical caveats already documented on our Tesla Model 3 entry.
Head unitNo replacement needed

Known integration products

Mounting locations

Crossover Likely

Real, active build community on MachEForum. Rear cargo area is 29.7 ft3 behind the 2nd row, 59.7 ft3 with seats folded (Ford's own published figures). Frunk is small (2.6-4.7 ft3 depending on model year/trim) and not a typical sub location. Most real installs put the sub in the rear cargo area, either resting on the raised (upper) cargo floor or dropped into the lower well where the charge-cable/tool storage normally sits.

Builds and products found for this vehicle

Outside links. Some are commercial products, some are owner builds posted on forums — the label says which. We do not endorse any of them.

Build it for this vehicle

Each link opens the tool with this vehicle already selected.

Before you cut anything

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.