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: 2-Door Roadster
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 the trunk opening (tool well) |
|---|---|
| Outer bounding box | Vehicle-specific enclosure catalogues; published box footprints are lower bounds on the cavity, not the cavity: SRQ Customs 'HONDA S2000 SUB ENCLOSURE - 12"': 24 x 16 x 12 in (as printed; axes not labelled), 0.8 cu ft, the cargo well; "will require removal of the toolkit". Zenclosures prints no outside dimensions. No measured trunk dimensions found. |
| Known obstructions | Both makers sit the box in the tool well; the tool tray (Zenclosures) or toolkit (SRQ Customs) has to come out. Zenclosures: with a cover fitted add about an inch of height (a reviewer's words on the product page, not the maker's). |
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 | Honda 2004: "two front mid-range speakers in the lower door panel" and "two tweeters mounted on the upper door"; sizes not printed. Honda 2008: the same layout in the 8-speaker system. |
|---|---|
| Adapter bracket needed | unconfirmed |
| Tweeter | upper door panel (Honda 2004 and 2008) |
| Midrange | lower door panel (Honda 2004 and 2008) |
| Factory amp / premium audio | Honda, by year. 2002: "Upgraded stereo system (30 watts per channel from 20) with door-mounted tweeters" (so 20 W per channel before 2002). 2004: "The 30-watt, four speaker system features two front mid-range speakers in the lower door panel ... two tweeters mounted on the upper door". 2008: "The 120-watt, eight-speaker system" with the four roll-bar tweeters added; Honda's 2008 sheet: "AM/FM/CD Audio System with 8 Speakers including 4 Integrated Roll Bar Speakers", standard on the S2000 and "available w/ AC" on the S2000 CR. No Honda page read mentions a subwoofer. Not found: the model year the 120 W system began (2005-2007 not read), amplifier location, speaker sizes. |
|---|
Honda lists 5.0 cu ft of cargo volume (2004: "EPA Cargo Volume (cu. ft.)" 5.00; 2007: "Cargo Volume (cu. ft.)" 5.00; 2008 S2000 and S2000 CR: 5.0). A luggage rating, not a box volume. The box makers fill the tool well: Zenclosures 0.80 ft3 at 7 1/8 in mounting depth; SRQ Customs 24 x 16 x 12 in, 0.8 cu ft, 7.75 in depth, toolkit removed.
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.