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 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 | rear cargo area, behind the rear seat |
|---|---|
| Outer bounding box | 38"W x 19"H x 20"/27"D — paired depth, unlabelled by this source. It means the space tapers between top and floor (confirmed semantics), but WHICH figure is which is not stated and cannot be inferred from the order. |
| Known obstructions | The cargo bay tapers between roof and floor by roughly seven inches of depth. Because the source does not say which end is which, DESIGN A FULL-HEIGHT BOX TO 20" — the smaller figure is safe whichever end it describes. Only a box that clearly occupies just one portion of the height can chase the 27". |
| Usable volume estimate | 3.5 ft³ |
Suggested configurations for this vehicle, not prescriptions. Run the numbers in the Box Builder before you buy anything.
| Subwoofers | Powered sub fed from the factory RCA subwoofer output if present — least work, least cargo lost |
|---|---|
| Box type | powered enclosure |
| Location | rear cargo area |
| Subwoofers | 1x12" sealed or 2x10" sealed |
|---|---|
| Box type | sealed |
| Location | rear cargo area |
| Subwoofers | 1x15" ported using the full 27" floor depth |
|---|---|
| Box type | ported |
| Location | rear 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 | 6-3/4", and this car left the factory with a real component set — the woofers are WIRED IN PARALLEL WITH THE TWEETERS. Replace with 5-1/4" or 6-1/2" component woofers; brackets are required. |
|---|---|
| Known obstructions | DRILLING REQUIRED: the factory woofers are riveted, so the rivets must be drilled out and new mounting screw holes drilled for the replacements. NOTE THE BIT SIZE DIFFERS FROM THE FIRST-GENERATION xB — this car wants a 5/32" bit where gen 1 used 1/8". Door-panel removal starts by prying out the sail-panel assembly that houses the tweeter and disconnecting its harnesses, then the power window switch panel, then working around the sides and bottom with a panel tool before disconnecting the door lock and release cables. Tools: panel tool, Phillips screwdriver, drill with 5/32" bit. |
| Adapter bracket needed | Yes — required for either replacement size, because the factory mounting is riveted rather than screwed. |
| Tweeter | Sail panel. NOTE THIS MOVED between generations — the first-generation xB puts its tweeters in the dash beside the gauge cluster, this one puts them in the door sail panel. |
| Factory speaker size | 6-3/4", 4 OHM. Replace with 6-3/4", 5-1/4" or 6-1/2" aftermarket — this location accepts the widest range of sizes on the car. |
|---|---|
| Known obstructions | DRILLING REQUIRED HERE TOO — new mounting holes, same as the front, plus brackets. The removal process is essentially the same as the front doors. Tools: panel tool, Phillips screwdriver, drill with 5/32" bit. |
| Adapter bracket needed | Yes, brackets are required. |
| Factory amp / premium audio | The standard system is a 6-speaker setup built around a Pioneer AM/FM/CD/MP3/WMA/AAC receiver, with Aux and iPod inputs on the centre console. Changes across the run: a new faceplate, an extra RCA OUTPUT FOR A SUBWOOFER (genuinely useful — see below), and a built-in HD Radio tuner from 2012. SEPARATELY, AND IMPORTANTLY, Scion's model was built around dealer-installed options, and those included a PREMIUM ALPINE SYSTEM, touchscreen navigation and rear-seat DVD. Crutchfield states directly that it has NOT fully researched an xB fitted with the optional gear, while noting its fit and compatibility recommendations still hold. So: the standard-system detail on this page is well sourced, and an Alpine-equipped car is a known unknown rather than something this page has verified. |
|---|---|
| Adding subs without a head-unit swap | Yes, and this car makes it easier than most — later factory receivers include an RCA subwoofer output, so a powered sub or an outboard amp can be fed a real line-level signal without a line-output converter at all. |
| Head unit | No replacement needed |
38"W x 19"H x 20"/27"D — substantially bigger than the first-generation xB in every dimension, and the source says it will hold "a pretty impressive box." Four inches more height than gen 1 is the meaningful difference. If cargo space matters more than output, the source's own suggestion is a powered sub instead of a built enclosure.
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.