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/Convertible
These are researched envelopes, not a guarantee. Measure your own vehicle — the numbers here tell you what to expect, not what you have.
| Location | footwell (non-trunk), parcel-shelf replacement (zero space used), or trunk stealth custom |
|---|---|
| Outer bounding box | Not independently measured as a single raw cavity — genuinely tiny trunk opening often requires a two-piece box just to get pieces in/out |
| Known obstructions | Extreme version of the access-constraint pattern seen on the Camaro/Mustang/Mazda6 — trunk opening itself, not internal volume, is usually the binding limit |
| Usable volume estimate | 0.5 ft³ |
Suggested configurations for this vehicle, not prescriptions. Run the numbers in the Box Builder before you buy anything.
| Subwoofers | 1x8" footwell-mounted (MiataBox) |
|---|---|
| Box type | sealed |
| Location | footwell — zero trunk space needed at all |
| Subwoofers | 2x8" parcel-shelf panel, or 1x10" trunk sealed |
|---|---|
| Box type | sealed |
| Location | parcel shelf (zero-impact) or trunk (stealth custom, expect a two-piece build to fit the opening) |
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 | 1990-1997: compatible with 5.25"/6.5"/6.75" (bracket needed for smaller, drilling for 6.75"). 2001-2005 non-Bose: 6x8" (6.5" aftermarket max). 2001-2005 Bose: genuinely unusual 8" diameter factory speaker. |
|---|---|
| Known obstructions | Real generation AND Bose-vs-non-Bose variance — this is one of the more fragmented door-speaker histories in the database, verify exact year/trim |
| Adapter bracket needed | yes |
| Tweeter | Upper front of the door panel — real, confirmed 3.5" tweeter, ~3" mounting depth, attached directly to the door panel rather than dash/A-pillar/sail-panel. Not independently broken out by exact generation (NA/NB/NC/ND) or Bose-vs-non-Bose within this combined entry's scope. |
| Factory amp / premium audio | Real, confirmed, with an important boundary to respect. Bose audio has been offered on Miata since 1998 — within this entry's 1990-2015 span, so real and applicable. IMPORTANT: Mazda specifically REDESIGNED the Bose system for the 2016 model year (all-new, 'optimized for open-air driving') — 2016 is the very next year after this entry's 2015 end date. Do not apply any 2016+ Bose spec (speaker count, wattage) to this entry; the pre-2016 system is a real, different, older design. Exact trim gating within 1998-2015 not independently confirmed. |
|---|---|
| Adding subs without a head-unit swap | Confirmed straightforward across all mounting locations found — none require touching the head unit |
| Head unit | No replacement needed |
GENUINELY CREATIVE, real zero-impact design found for this tiny-trunk sports car: a speaker panel replaces the parcel shelf and fits TWO 6.5" speakers PLUS a pair of 8" subwoofers WITHOUT consuming any interior or trunk space — seats still slide normally. A completely different alternative also exists: 'MiataBox,' a FOOTWELL-mounted enclosure (not trunk at all) that fits any 8" sub with included wiring/polyfill/terminals — a genuinely unusual mounting location unique to this small-cabin car. For trunk-based builds: 8" sealed stealth boxes (2006-2015) use MDF + polyester resin coating for rigidity; 1990-2005 custom-fit single 10" sealed options exist too. REAL ACCESS CONSTRAINT: custom trunk builds often require TWO separate boxes just to physically get pieces in and out of the tiny trunk opening — an extreme version of the access-constraint pattern already seen on Camaro/Mustang/Mazda6.
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.