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: 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 | underseat, crew cab — same Goose Gear seat-delete product line as the 2010-2018 page (spans '2009-Present, 4th & 5th Gen' as one continuous line). Confirmed factory subwoofer bay: the seat-delete plate's 60% side has a documented 'factory subwoofer compatible' version with dedicated slots. |
|---|---|
| Outer bounding box | ~38.625"W x 42"L (plate footprint), 25.125"H back wall — same as the 2010-2018 page; cross-checks reasonably with the commercial box specs already in this page (2.2 ft3 dual ported, 1.2-1.4 ft3 single variants) Vehicle-specific enclosure catalogues; published box footprints are lower bounds on the cavity, not the cavity: Kicker 'RAM Classic-Specific Dual 10" L7T 2-Ohm Enclosure': 58-7/16" W x 7-9/16" H x 16-7/16" D (Kicker's labels; the box is formed to the cab contours), under the back seat; NET Audio '2019 Ram 5th Gen Crew Cab 2500/3500 HD Sub Box Dual Low': 59 x 16 x 8.5 in (as printed; axes not labelled), 1.6 ft3, under rear seat, full width; NET Audio '2019 Ram 5th Gen Crew Cab 2500/3500 HD Sub Box 40 Low Driver Side': 25 x 16 x 9 in (as printed; axes not labelled), 0.4 ft3, under rear seat, driver side small side of the split back seat; SRQ Customs 'RAM 1500/2500/3500 Crew Cab Subwoofer Enclosure': 52 x 14 x 14 in (as printed; axes not labelled), rear cabin area, under the back seat [only 2020-2024]. Kicker lists this box for RAM 2500/3500 Crew Cab 2009-2026; its footprint is a different measurement from the seat-delete plate above. Vehicle-specific enclosure catalogues; published box footprints are lower bounds on the cavity, not the cavity: Ground Shaker 'BLACK 8" DUAL SEALED SUB BOX, FITS 03-24 DODGE RAM 2500/3500 CREW-CAB & EXT-CAB': Height 8 1/4", Length 55 1/2", Depth 13 3/4" (labelled by Ground Shaker), 0.98 FT^3 (2 chambers), FITS UNDER REAR SEAT. |
| Known obstructions | None specifically documented |
| Usable volume estimate | 2.2 ft³ |
Suggested configurations for this vehicle, not prescriptions. Run the numbers in the Box Builder before you buy anything.
| Subwoofers | 1x10" or 1x12" sealed, '60 Low' variant (1.2 ft3, no seat lift) |
|---|---|
| Box type | sealed |
| Location | under rear seat, standard height |
| Subwoofers | 2x10"/12" ported (2.2 ft3, tuned 35Hz) or '60 Tall' (1.4 ft3, seat lift) |
|---|---|
| Box type | ported or sealed depending on tier |
| Location | under rear seat |
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 | cutout is 6x9", but only ~2" of real mounting depth limits practical replacement size to 6.5" unless using the Mopar-catalog Kicker 6x9" direct-fit part — same finding source covered the 2010-2024 Ram HD range as one continuity, applies to this page too. Confirmed: this generation shares the same Alpine/Harman Kardon door architecture as the Ram 1500 DT (2019-2025, same page family) — 6x9" woofer + 3.5" tweeter on the premium-audio trims. |
|---|---|
| Max mounting depth | 2 in |
| Known obstructions | Shallow ~2" mounting depth is the binding constraint, not the cutout size |
| Adapter bracket needed | Genuine Mopar part number confirmed for a cross-trim upgrade: 68043045AD (3.5" Harman Kardon dash speaker) — owner caution: the 6x9" HK door speakers are 4-ohm vs. the Alpine system's 2-ohm, so swapping doors specifically will cost some volume; the 3.5" dash/tweeter units don't have this impedance mismatch issue. |
| Tweeter | Door-mounted, high position, alongside the woofer — same design as the Ram 1500 DT, not a separate A-pillar location. Per Ram's MY2019 release: the door tweeter is 1" and on the Harman Kardon 17-speaker system only ("Two 1-inch tweeters located in the front doors"); the Alpine 10-speaker system has no door tweeters. The 3.5" units are instrument-panel and headliner speakers, not door tweeters (the 3.5" figure had been carried over from the Ram 1500 DT). |
| Midrange | n/a in the doors — dash-corner midrange likely present on premium trims matching the 1500 DT's pattern, not independently re-confirmed for this HD-specific page |
| Factory speaker size | 6x9" cutout |
|---|---|
| Known obstructions | Depth constraint not confirmed for rear doors specifically |
| Adapter bracket needed | unconfirmed |
| Tweeter | n/a — matches the Ram 1500 DT's confirmed woofer-only rear doors |
| Factory amp / premium audio | Per Ram's own MY2019 press release: there IS a factory Alpine system — "Alpine Premium (506 watts, 10-channel, 10-speaker)", available on Big Horn/Lone Star and Power Wagon and standard on Laramie, Laramie Longhorn and Limited (three dash speakers, four door speakers, two headliner speakers, an 8-inch subwoofer, active noise cancellation). The Harman Kardon "Premium Plus (750 watts, 17-speaker)" is the top option on Power Wagon, Laramie, Longhorn and Limited. Base: six speakers (two 3.5" dash + four 6x9" door) on Tradesman Crew Cab, Big Horn/Lone Star and Power Wagon; four speakers on Tradesman Regular Cab. MY2022 feature availability agrees: "Premium 10-speaker" optional on Big Horn/Lone Star and Power Wagon, standard on Laramie/Longhorn/Limited; "Premium Plus 17-speaker" optional on Power Wagon, packaged on Laramie/Longhorn/Limited. This generation brought another brand change in the Ram/Dodge pattern (Infinity, then Alpine, then Harman Kardon on top). |
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| Adding subs without a head-unit swap | Confirmed straightforward — multiple commercial loaded enclosures exist for direct fit |
| Head unit | No replacement needed |
Three product variants: dual ported box (2.2 ft3, tuned 35Hz); '60 Tall' box (1.4 ft3, requires a 1.5" seat lift with kit included, seat retains full function and still locks); '60 Low' box (1.2 ft3, no seat lift needed). Separately, single-12" spec: ~7" mounting depth, 11.15" sub hole, 1.55 ft3 per sub. This gives a genuine height-vs-volume tradeoff choice worth surfacing directly in any build tool — not every vehicle has this explicit a low/tall option pair documented.
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.