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: 5-Door Liftback/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 | driver's-side trunk storage cubby |
|---|---|
| Outer bounding box | No independently measured raw cavity envelope found — the NVX enclosure's own installed design (fits the cubby, minimal space sacrifice) is the best reference point. |
| Known obstructions | 12V battery: right-rear corner, under the trunk floor — a specific, avoidable corner rather than a space-consuming intrusion into the main cargo area. |
Suggested configurations for this vehicle, not prescriptions. Run the numbers in the Box Builder before you buy anything.
| Subwoofers | 1x8" or 1x10" sealed shallow-mount |
|---|---|
| Box type | sealed |
| Location | driver's-side trunk storage cubby |
| Subwoofers | 1x10" sealed (named product: NVX BE-TOY-PRIG3-NSW104V2, 200-350W RMS) or 2x10" in the spare-tire-well area (documented builder example) |
|---|---|
| Box type | sealed |
| Location | driver's-side trunk cubby, or spare tire well for a larger dual-sub build |
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 | Sources vary between 6x9" and 6.5"/6.75" depending on trim/source — a retailer note states factory 6x9"-family speakers can be replaced by same-size, 6-1/2", or 6-3/4" aftermarket models, true across Prius systems generally. |
|---|---|
| Known obstructions | None specifically documented |
| Adapter bracket needed | unconfirmed |
| Tweeter | Front door, separate from the dash corner tweeter. |
| Factory speaker size | 6-3/4", mounted in the LOWER part of the rear door (a specific mounting-height detail worth noting, not just 'rear door 6-3/4"'). |
|---|---|
| Known obstructions | Lower-door mounting position — verify clearance/access differs from a standard mid-door mounting before assuming a generic rear-door swap procedure applies unchanged. |
| Adapter bracket needed | unconfirmed |
| Tweeter | n/a — not independently confirmed as a rear-door tweeter location |
| Factory amp / premium audio | Base system: 6 speakers. Optional premium tier: JBL, 8 speakers. A real mid-generation upgrade exists within this page's span — starting model year 2012, the JBL option moved to Harman's 'GreenEdge' technology (lower-power, less-heat speaker design specifically marketed for hybrids), a genuine spec change partway through 2010-2015, not a single static system. Exact trim name gating (base Two/Three vs. Four/Five) not independently confirmed. Toyota's own releases: 2010-2011 Navigation Package on the Prius Three, Four and Five 'JBL AM/FM 4-disc CD changer ... eight speakers'; 2012 'the Prius Four includes that system plus eight JBL GreenEdge speakers and an eight-channel JBL amplifier'; Prius Two 'six speakers'. No Toyota page read mentions a subwoofer. |
|---|---|
| Adding subs without a head-unit swap | Confirmed straightforward via the NVX enclosure's line-out-converter-based install approach and general trunk-cubby builds — doesn't require touching the head unit. |
| Head unit | No replacement needed |
Generation-specific named commercial product: NVX BE-TOY-PRIG3-NSW104V2 ('PRIG3' = Prius Gen 3, confirming the product itself is named after the exact generation this page covers) — a custom-fit 10" sealed enclosure, hand-laid fiberglass, fits the storage cubby on the left/driver's side of the trunk, described as sacrificing very little space. 200-350W RMS, NSW104v2 driver (750W peak, non-pressed-paper cone, custom high-roll foam surround), 2-ohm final wired impedance. NVX also sells a full turnkey bass package (same enclosure + amp + LOC + wiring) for this exact generation. Separately, DIYMobileAudio and PriusChat forums confirm active general discussion of spare-tire-well mounting as a space-conscious alternative, consistent with the pattern already used on several other vehicles covered here. EPA luggage figure (fueleconomy.gov, hatchback): 22 cu ft for 2010, 2013 and 2015. On a hatchback or wagon EPA's number is an index computed from SAE J1100 dimensions (40 CFR 600.315-08), not the seats-up cargo volume, and never a box volume.
Prius (all trims, this generation are hybrid-only — no gas-only or plug-in variant exists for the 3rd Gen; the Prius Plug-in Hybrid was a separate, later-introduced trim within this same generation starting 2012, not independently distinguished from the standard Hybrid). HV battery pack: located behind the rear seats, under a protective cover — the classic, low, horizontal Prius battery layout, confirmed to NOT intrude into the trunk/cargo area (a genuinely different, more cargo-friendly placement than several other hybrids in this catalogue that place batteries under cargo floors or in spare-tire wells). 12V battery: right-rear corner, under the trunk floor. A compact spare tire is retained on standard Hybrid trims.
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.