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: Quad Cab, Crew Cab
These are researched envelopes, not a guarantee. Measure your own vehicle — the numbers here tell you what to expect, not what you have.
| Location | under rear seat — ARCHITECTURAL DIFFERENCE FROM FORD/GM: unlike the Ford/Chevy/GMC trucks, Ram does NOT offer a factory or dealer-accessory underseat STORAGE BIN product for the crew cab — Ram's own storage accessories are optional IN-FLOOR bins near the rear doors, not a continuous underseat cavity product. This does NOT mean there's no usable space under the seat — the real subwoofer box products already in this page (dual 12" sealed, dual 8" ported) clearly do mount there — it means the raw envelope has to be reconstructed from audio-industry sources rather than the storage-accessory industry, since that industry doesn't build for this specific cavity the way it does for Ford/GM. |
|---|---|
| Outer bounding box | Not independently confirmed as a standalone envelope — inferred from the two reference builds (dual 12" sealed down-firing; dual 8" ported front-to-back) as a lower bound only. Published lower bound: Kicker 51K5RDL7T102 is 50-9/16"W x 7-5/8"H x 16-3/8"D and installs under the Crew Cab back seat (Kicker lists Crew Cab 2019-2026). Quad Cab: no published box found. Vehicle-specific enclosure catalogues; published box footprints are lower bounds on the cavity, not the cavity: NET Audio '2019-up Ram 5th Gen Crew Cab 1500 Sub Box Small Downfire Sealed': 9 x 12 x 40 in (as printed; axes not labelled), 1.22 ft3, under seat, tucked under the back seat and between the cargo bins in the floor; NET Audio '2019-up Ram 5th Gen Crew Cab 1500 Sub Box Downfire, Without Bins, Sealed': 52 x 12 x 24 in (as printed; axes not labelled), 2.82 ft3, under rear seat; does not allow access to cargo bins; requires a seat lift; SRQ Customs '2019-up RAM Crew Cab Subwoofer Enclosure': 52 x 14 x 14 in (as printed; axes not labelled), under back seat; no seat lift; covers cubby holes in the floor; SRQ Customs '2019-up RAM Subwoofer Enclosure for JL Audio 10TW3's': 36 x 14 x 10 in (as printed; axes not labelled), fits neatly under the passenger side of the back seat (flat floor). Vehicle-specific enclosure catalogues; published box footprints are lower bounds on the cavity, not the cavity: Ground Shaker 'BLACK 10" SINGLE PORTED SUB BOX, FITS 19-26 DODGE RAM 1500 CREW-CAB': Height 8 1/4", Length 33 1/2", Top Depth 19 3/4", Bottom Depth 14" (labelled by Ground Shaker), 1.12 FT^3, FITS UNDER REAR SEAT (PASSENGER SIDE); Ground Shaker 'BLACK 8" DUAL SEALED SUB BOX, FITS 19-26 DODGE RAM 1500 CREW-CAB': Height 8 1/4", Length 52", Top Depth 19 3/4", Bottom Depth 14" (labelled by Ground Shaker), 1.76 FT^3 (2 chambers), FITS UNDER REAR SEAT. |
| Known obstructions | None specifically documented |
| Usable volume estimate | 1.87 ft³ |
Suggested configurations for this vehicle, not prescriptions. Run the numbers in the Box Builder before you buy anything.
| Subwoofers | 1x10" or 1x12" sealed |
|---|---|
| Box type | sealed |
| Location | under rear seat, down-firing |
| Subwoofers | 2x10" or 2x12" sealed/ported, or quad 8" ported (named options: Skar Audio vehicle-specific line, multiple configs) |
|---|---|
| Box type | sealed or ported, vehicle-specific |
| Location | under rear seat, down-firing |
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 | 6x9" full-range (base 6-speaker system) or 6x9" woofer + 3.5" tweeter (Alpine/Harman Kardon systems). Precise electrical detail confirmed: each Alpine/HK front-door tweeter runs through a 4.7-microfarad crossover cap. Real removal detail: 2 Torx T20 screws secure each door speaker to the door. |
|---|---|
| Max mounting depth | 2.922 in |
| Known obstructions | None specifically documented |
| Adapter bracket needed | no — same-size replacement available; 5.25"/6.5" aftermarket also fit with included brackets |
| Tweeter | Mounted IN TANDEM with the woofer, in the 'high location' of each front door — a genuinely different design than the separate A-pillar tweeter pattern confirmed on other vehicles covered here (Cadillac, Chrysler 300) — this tweeter lives in the door itself, right alongside the woofer, not a separate pillar location. |
| Factory speaker size | 6x9" (Crew Cab and Quad Cab both) — confirmed: rear doors get the woofer ONLY, no tweeter, on any trim/system. |
|---|---|
| Known obstructions | None specifically documented |
| Adapter bracket needed | no |
| Tweeter | n/a — confirmed woofer-only rear doors on every trim |
| Factory amp / premium audio | Alpine 10-speaker on Laramie trim; Harman Kardon 19-speaker on higher trims (2024 model year info, confirm per-year) |
|---|---|
| Adding subs without a head-unit swap | Non-premium trims should take a standard LOC tap fine. Alpine/Harman Kardon trims need adapter verification before recommending generic wiring. |
| Head unit | No replacement needed |
Builder reference: custom-fit dual 12" sealed down-firing enclosure. A second builder used a ported config with 2x8" subs positioned front-to-back, port facing the floor at the rear. Down-firing seems to be the community-preferred orientation for this cab's underseat space.
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.