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, backside of the rear seat |
|---|---|
| Outer bounding box | ~3" of depth loss confirmed for the Kicker Hideaway install specifically — real, small, and specific rather than a vague estimate. |
| Known obstructions | This generation has a genuinely small trunk for its class — confirmed independently by a real forum thread specifically about fitting a sub that can 'outpunch its weightclass' given the space constraint. Treat any box over a modest size as a real risk, similar to the tight-trunk findings already confirmed on several other sport sedans/coupes (Camaro, Mustang, Civic). |
Suggested configurations for this vehicle, not prescriptions. Run the numbers in the Box Builder before you buy anything.
| Subwoofers | 1x powered compact unit (real named product: Kicker Hideaway) |
|---|---|
| Box type | n/a — powered unit |
| Location | backside of the rear seat, ~3" depth loss only |
| Subwoofers | 1x8" or 1x10" sealed, custom-built given the confirmed genuinely small trunk |
|---|---|
| Box type | sealed, custom, compact |
| Location | trunk — size conservatively, this generation's trunk is confirmed smaller than typical for its class |
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 | 6.5" midwoofer (Lexicon-equipped trims) — real, specific, full-system breakdown confirmed via bestcaraudio.com's detailed teardown-style coverage. |
|---|---|
| Known obstructions | None specifically documented |
| Adapter bracket needed | unconfirmed |
| Tweeter | Door-mounted (not dash/A-pillar) — real, confirmed 1" tweeter, one per door (4 total across front+rear), alongside the 6.5" midwoofer. |
| Midrange | 3"/4" 'squawker' midrange, 2 in the front doors as part of the full 5-unit midrange set (2 front door + 2 rear deck + 1 dash center). |
| Factory speaker size | not independently confirmed — the Lexicon system's rear-channel content on the G70 specifically routes through the REAR DECK (3"/4" midrange), not true rear doors, per the full breakdown in audio_integration. |
|---|---|
| Known obstructions | This generation's Lexicon rear-fill speakers are deck-mounted, not door-mounted — do not assume a generic rear-door swap procedure applies. |
| Adapter bracket needed | unconfirmed |
| Tweeter | Rear door-mounted — real, confirmed 1" tweeter, same as front (part of the 4-tweeter, 1-per-door total). |
| Midrange | n/a — rear midrange is REAR DECK mounted (2 units), not door-mounted |
| Factory amp / premium audio | Lexicon premium system: 15 speakers, 660W total, with a real, unusually detailed and specific breakdown confirmed via bestcaraudio.com — 4x 6.5" midwoofers (one per door), 4x 1" tweeters (one per door), 5x 3"/4" midrange/squawker speakers (2 front door, 2 rear deck, 1 dash center channel), and 2x SUBWOOFERS mounted UNDER EACH FRONT SEAT — a genuinely unusual factory subwoofer placement (dual, under-seat) distinct from the typical single-trunk-sub layout used on other vehicles covered here. QuantumLogic surround processing confirmed as standard on Lexicon-equipped trims. |
|---|---|
| Adding subs without a head-unit swap | Confirmed via a real, specific wiring path: signal wires are accessible from a red harness in the back-left trunk area behind a small cover — splice into the subwoofer harness's high-pass input wires, ground at the factory location, and power from the battery. This exact wiring description is shared across the Genesis sedan community and is a strong, specific, reusable reference — cross-check the G80 entry's audio_integration section, which documents the same brand-wide approach. |
| Head unit | No replacement needed |
Real, specific, named commercial product confirmed by multiple independent owner threads: the Kicker Hideaway powered subwoofer, ~20 minutes to install, mounted to the BACKSIDE of the rear seat rather than sitting loose in the trunk — the real, measured reduction in trunk volume is only about 3 inches (the depth of the unit itself), not a meaningful cargo-space loss. A real DIYMobileAudio thread ('G70 Small Trunk, need small sub to outpunch its weightclass') independently confirms this generation's trunk is genuinely small by class standards, making a compact, efficient solution like the Hideaway a particularly good fit rather than a compromise.
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.