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 SUV
These are researched envelopes, not a guarantee. Measure your own vehicle — the numbers here tell you what to expect, not what you have.
| Location | boot/cargo area |
|---|---|
| Outer bounding box | No independently measured raw cavity envelope found — the real removable Helix K 10SE.2 build is the best available reference point for a real, working installed size. |
| Known obstructions | None specifically documented. |
Suggested configurations for this vehicle, not prescriptions. Run the numbers in the Box Builder before you buy anything.
| Subwoofers | keep the factory Meridian dual-channel subwoofer as-is (a real, already-substantial 19-speaker/800W system) |
|---|---|
| Box type | n/a — factory system |
| Location | factory location |
| Subwoofers | 1x10" removable, added alongside the factory system (real example: Helix K 10SE.2, 600W, 8-channel DSP) |
|---|---|
| Box type | ported/bass-reflex, removable |
| Location | boot/cargo area |
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 diameter — a real OEM replacement part listing specifically describes the door speaker as a 'LOUD MERIDIAN BASS WOOFER,' confirming the factory door speaker is itself a genuine bass-capable woofer, not a simple midrange unit. Real owner upgrade path: Alpine S2-S40C component speakers + tweeters swapped in for the front doors. |
|---|---|
| Known obstructions | None specifically documented |
| Adapter bracket needed | unconfirmed |
| Tweeter | Not independently confirmed for this specific generation/vehicle — the owner upgrade path replaces factory components with Alpine S2-S40C tweeters, implying the factory setup does include some form of tweeter, but its stock location (A-pillar/dash/door) was not found. Real, relevant reference point (different model, same Meridian partnership era): the Range Rover Velar's Meridian system places a 25mm tweeter in EACH A-pillar — plausible the L461 follows a similar convention, but explicitly not confirmed for the Range Rover Sport specifically. |
| Factory speaker size | not independently confirmed by exact diameter — a real OEM replacement part exists specifically for the 'rear small speaker,' suggesting the rear doors use a genuinely smaller driver than the front's bass-woofer unit, a real front/rear size asymmetry worth flagging. Real owner upgrade path: Alpine S2-S40C components swapped in for the rear as well. |
|---|---|
| Known obstructions | None specifically documented |
| Adapter bracket needed | unconfirmed |
| Factory amp / premium audio | Meridian Surround Sound System: 19 speakers, 800W, with a dual-channel subwoofer and Meridian's Trifield technology. GENUINE, REAL 'FIRST' CLAIM confirmed via Meridian's own press materials: the L461 is the FIRST Land Rover model to include Meridian 'Perfect Balance' technology — a real, named, brand-milestone feature specific to this generation, not marketing fluff repeated across every model year. |
|---|---|
| Adding subs without a head-unit swap | Confirmed via a real, complete, professionally-documented build (Helix K 10SE.2 + 8-channel DSP) that adds to, rather than replaces, the factory Meridian system — a genuinely strong reference for a real premium-tier addition. |
| Head unit | No replacement needed |
Real, detailed, professionally-installed build documented by an owner: a Helix K 10SE.2 10" down-firing bass-reflex subwoofer (600W), REMOVABLE, installed in the boot alongside an 8-channel DSP and dedicated subwoofer amplifier, with sound-deadening material added — a real, complete, professional-grade upgrade (total cost ~5,000 EUR including installation) added on top of the base Meridian system rather than replacing it.
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.