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
These are researched envelopes, not a guarantee. Measure your own vehicle — the numbers here tell you what to expect, not what you have.
| Location | trunk, through existing opening |
|---|---|
| Outer bounding box | No independently measured raw cavity envelope found — the Skar Audio ported enclosure's own design is the best reference point. Vehicle-specific enclosure catalogues; published box footprints are lower bounds on the cavity, not the cavity: Ground Shaker 'BLACK 10" DUAL SEALED SUB BOX, FITS 94-25 HONDA ACCORD': Height 13 1/2", Front Length 37 1/4", Rear Length 31 1/4", Top Depth 13 1/2", Bottom Depth 17 3/4" (labelled by Ground Shaker), 3.15 FT^3 total; 1.58 FT^3 per subwoofer, Fits contoured to trunk shape directly behind rear seat; Ground Shaker 'BLACK 10" SINGLE PORTED SUB BOX, FITS 02-25 HONDA ACCORD': Height 13 1/2", Length 29", Top Depth 13", Bottom Depth 17" (labelled by Ground Shaker), 2.33 FT^3, Slides up against the rear seat. |
| Known obstructions | None specifically documented — hybrid battery placement (under rear seat, not trunk) confirmed to NOT intrude on this cavity, same as the 10th Gen page's finding. |
Suggested configurations for this vehicle, not prescriptions. Run the numbers in the Box Builder before you buy anything.
| Subwoofers | 1x8" or 1x10" sealed, generic trunk install |
|---|---|
| Box type | sealed |
| Location | trunk |
| Subwoofers | 1x10" ported (named product: Skar Audio VS-1X10HONACC-2023-UP-V) |
|---|---|
| Box type | ported/vented |
| Location | trunk |
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 | not independently confirmed by exact size |
|---|---|
| Known obstructions | None specifically documented |
| Adapter bracket needed | unconfirmed |
| Tweeter | Not independently confirmed for this generation — search results returned the 10th Gen (2018-2022) page's own confirmed 1.570" dash tweeter instead of an 11th-gen-specific figure. Unconfirmed for this generation, since this generation's Bose70 tier is gated to Touring Hybrid ONLY (a narrower trim gate than the 10th Gen's broader premium-audio tier) — the tweeter architecture may well differ too. |
| Factory speaker size | not independently confirmed by exact size |
|---|---|
| Known obstructions | None specifically documented |
| Adapter bracket needed | unconfirmed |
| Factory amp / premium audio | Trim-specific breakdown confirmed via Honda's own spec sheet: a 180W, 8-speaker system is standard on EX, Sport Hybrid, EX-L Hybrid, and Sport-L Hybrid trims. The Bose70 premium system (12 speakers including a subwoofer, Centerpoint/SurroundStage) is exclusive to the Touring Hybrid trim — meaning on this generation, the top premium-audio tier is ONLY available paired with the Hybrid powertrain, a real trim-gating detail worth surfacing rather than assuming Bose is available across the board. A forum thread specifically confirms this exact 8-speaker (Hybrid/Bose-less trims) vs. 12-speaker (Touring Hybrid) split. From Honda's 2023-2025 spec sheets: the LX runs a 160W 4-speaker system (not listed above); the 2025 SE trim is 180W/8 speakers; Honda's 2023 press kit calls the Touring system a "12-speaker Bose premium audio system with subwoofer". Honda publishes no door or tweeter sizes. |
|---|---|
| Adding subs without a head-unit swap | Confirmed straightforward — trunk-based builds don't touch the head unit. |
| Head unit | No replacement needed |
Generation-specific named commercial product: Skar Audio sells a 10" LOADED VENTED (ported) enclosure specifically for 2023-UP Accord — notably a PORTED design, different from the sealed designs used on both the 9th Gen (2013-2017) and 10th Gen (2018-2022) Accord products, a real design-choice difference, so do not assume every generation gets the same sealed treatment. GENUINE STRUCTURAL NOTE FOR THIS GENERATION SPECIFICALLY: most trims of this generation ship as a Hybrid (see hybrid ev note) — a non-hybrid gas-only Accord still exists on lower trims, but hybrid is effectively the mainstream powertrain here, unlike prior generations where hybrid was a minority option.
Accord Hybrid is effectively the MAINSTREAM powertrain for this generation (EX, Sport Hybrid, EX-L Hybrid, Sport-L Hybrid, and Touring Hybrid all ship as Hybrid) — a real structural difference from prior generations where hybrid was a minority option. HV battery placement confirmed the same as the 10th Gen file's finding: under the rear seat base, NOT in the trunk. Cargo capacity holds steady around 16.7 ft3 across the lineup, matching non-hybrid figures. The same real misinformation flagged in the 10th Gen file (some owners incorrectly told a spare tire can't be added because the battery sits in the spare-tire well) applies with even more force here given how much more common the Hybrid trim now is — worth actively correcting if it comes up.
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.