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 Wagon
These are researched envelopes, not a guarantee. Measure your own vehicle — the numbers here tell you what to expect, not what you have.
| Location | right rear corner of the cargo area, factory Harman Kardon enclosure |
|---|---|
| Outer bounding box | sized for a 6x9" driver (factory spec) — full outer box dimensions not independently published |
| Known obstructions | Multiple interior panels must be removed to access; factory mounting bracket typically needs trimming for a replacement driver |
Suggested configurations for this vehicle, not prescriptions. Run the numbers in the Box Builder before you buy anything.
| Subwoofers | OEM-spec 6x9" replacement in the factory location/bracket |
|---|---|
| Box type | factory enclosure |
| Location | right rear corner of cargo area, HK trims only |
| Subwoofers | quality aftermarket 6x9" driver in the factory bracket (real documented owner build: Kicker drop-in replacement) — no larger-driver/bigger-box commercial build confirmed for this bay |
|---|---|
| Box type | factory enclosure, driver-level replacement |
| Location | right rear corner of cargo area, HK trims only |
Sizes and depths below are what research turned up for this generation. Confirm against your own vehicle before cutting or ordering — trim levels vary.
| Adapter bracket needed | unconfirmed |
|---|---|
| Tweeter | Dash-corner, under a grille — real, confirmed via Crutchfield's own dedicated install guide for this generation, wired IN PARALLEL with the front door speaker (splice both leads when replacing to keep the door speaker working). A real genuine Subaru OEM accessory (Tweeter Kit, part # H630SAN100) exists specifically to ADD this tweeter to base models that lack it — confirming not every trim ships with one factory. |
| Adapter bracket needed | unconfirmed |
|---|---|
| Tweeter | n/a — tweeter is dash-corner mounted, front only |
| Factory amp / premium audio | Harman Kardon premium system confirmed, exclusive to equipped trims. All sound routes through a dedicated HK amplifier (same failure-mode caution as the Forester SK generation — a bad amp can present as a speaker/sub fault). |
|---|---|
| Adding subs without a head-unit swap | Confirmed — Crutchfield's own install guidance covers swapping the factory 6x9" HK subwoofer without a head-unit change |
| Head unit | No replacement needed |
Real, precise factory location and size confirmed via Crutchfield's own install guide (a professional installer-facing source, not just forum speculation): a 6x9" subwoofer sits in the RIGHT REAR corner of the cargo area on Harman Kardon-equipped trims. Real installer note: accessing/replacing it requires removing a fair number of interior panels — described as not technically hard but genuinely time-consuming, and the mounting bracket usually needs trimming to fit a replacement driver cleanly.
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.