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 | cargo floor, behind the 3rd row |
|---|---|
| Outer bounding box | factory sealed OEM unit, no aftermarket-facing raw dimension published |
| Known obstructions | B&O amplifier module occupies trunk space to the right of the subwoofer |
Suggested configurations for this vehicle, not prescriptions. Run the numbers in the Box Builder before you buy anything.
| Subwoofers | Not researched yet (no confirmed aftermarket entry-level build found) |
|---|---|
| Box type | unconfirmed |
| Location | unconfirmed |
| Subwoofers | genuine OEM B&O subwoofer replacement (verify exact part number per model year) |
|---|---|
| Box type | factory sealed enclosure |
| Location | cargo floor, behind 3rd row |
Sizes and depths below are what research turned up for this generation. Confirm against your own vehicle before cutting or ordering — trim levels vary.
| Adapter bracket needed | unconfirmed |
|---|---|
| Tweeter | Real, genuinely distinctive TWO-LOCATION tweeter architecture confirmed on the 23-speaker B&O '3D Advanced' system, NOT door-mounted: (1) a 19mm tweeter + midrange combo built into the UPPER A-PILLAR on each side, and (2) a separate pair of MOTORIZED 'lifting' tweeters that physically rise up OUT OF THE DASHBOARD (with ambient lighting) — a real, named B&O 'Design Lifting Tweeter' feature, the same rotating/rising-tweeter technology family also found on Volvo and Mercedes systems on other vehicles covered here. Each tweeter uses dual neodymium magnets in an acoustic lens. This is a materially different, more elaborate architecture than either Audi entry (Q5's simple A-pillar tweeter, A4's dash-corner tweeter) — genuinely reflects the Q7's flagship-tier positioning. |
| Midrange | A-PILLAR mounted, paired with the A-pillar tweeter (see above) — real, confirmed on the 23-speaker system, not door-mounted. |
| Adapter bracket needed | unconfirmed |
|---|
| Factory amp / premium audio | Bang & Olufsen confirmed as the real premium tier for most of this generation's span, with a genuine 23-speaker '3D Advanced' system named in current B&O corporate materials — real, possible running change around 2021 flagged above but not resolved. Genuine OEM subwoofer/amp parts confirmed available through Audi's own parts channel. |
|---|---|
| Adding subs without a head-unit swap | no real forum-documented aftermarket-addition build was found, likely reflecting thinner general car-audio-forum coverage for this luxury model (same pattern noted on other vehicles covered here for other luxury SUVs). |
| Head unit | No replacement needed |
Entirely missing model until now — Audi's 3-row flagship SUV (existing Audi coverage was only the A4 sedan and Q5 compact SUV). Real, confirmed premium tier: Bang & Olufsen, with a genuine named OEM part confirmed (subwoofer, part # 4M0035621A referenced for the 2017 model year). Real, precise factory placement: subwoofer built into the cargo floor, with the B&O amplifier mounted in the trunk behind the 3rd row seats, to the right of the subwoofer. **RESOLVED 2026-07-22**: the earlier '2021: B&O gone!' claim was checked directly against its source article and confirmed to be a misleading headline for a single customer's AFTERMARKET upgrade case study (one 2021 Q7 owner replaced their factory B&O Premium system with Blam/Match/Helix aftermarket components) — NOT an Audi production-line change. B&O remained the real factory system across the full 2017-2025 span; B&O's own current corporate partner page confirms a 23-speaker '3D Advanced' system as the ongoing top tier.
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.