2012-2020 Chevrolet Sonic Single generation (Gamma II) — 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 Sedan, 5-Door Hatchback

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.

Trunk Solid

Locationtrunk
Outer bounding boxReal total cargo figure: 14.9 ft3. No named commercial subwoofer-box product confirmed — genuinely thinner sourcing than most vehicles in this batch.
Known obstructionsNone specifically documented

Starting points

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

Budget

SubwoofersPowered sub, sized from your own trunk measurements
Box typepowered enclosure
Locationtrunk / rear cargo area

Enthusiast

Subwoofers1x10" or 1x12" sealed, built to measurements taken from your own car — no published envelope exists
Box typesealed
Locationtrunk / rear cargo area

Competition

SubwoofersNot sizeable from this page. No measured cargo envelope is published for this vehicle; measure first
Box typecustom
Locationtrunk / rear 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 size6-1/2" midbass/full-range (SIZE AGGREGATOR — listed 2012-2020, the entire production run)
Known obstructionsNo documented depth constraint. No removal procedure exists — no Research Garage article for this car.
Adapter bracket neededunconfirmed — no bracket requirement documented for this vehicle
TweeterA-pillar, across the whole run.

Rear doors Likely

Factory speaker size6-1/2" midbass/full-range in the rear door panel (SIZE AGGREGATOR — listed 2012-2020). Same size front and rear on this car, which simplifies a four-door replacement to one part number.
Known obstructionsNot documented in any reachable source.
Adapter bracket neededunconfirmed

Factory audio integration

Factory amp / premium audioBOSE IS THE PREMIUM TIER AND IT INVERTS THE USUAL RULE HERE — the integration part below requires the car to be WITHOUT Bose. There is also a second, separate fitment gate on this car that has nothing to do with the speakers: the GM RADIO OPTION CODE. See known_integration_products.
Adding subs without a head-unit swapAssumed yes, but not documented for this vehicle. With no measured cargo envelope and no removal procedures published, treat any build here as requiring your own measurements first.
Head unitNo replacement needed

Known integration products

Mounting locations

Trunk Likely

NO CRUTCHFIELD RESEARCH GARAGE ARTICLE EXISTS FOR THIS CAR — verified against the complete 296-entry index re-harvested 2026-08-04. That matters because the Research Garage is the only source that publishes measured cargo bounding boxes, which is why this entry has no raw_cavity_envelope and why its speaker data comes from weaker sources than the rest of the catalog. Measure your own car before cutting wood. No measured cargo dimensions are published for this vehicle in any source reached, and no vehicle-specific commercial enclosure with published volume was found either. Measure before building.

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.