2004-2008 Ford F-150 Subwoofer Box Fitment

2004-2008 Ford F-150 11th Gen — subwoofer box fitment

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: Regular Cab, SuperCab, SuperCrew

Where a box actually fits

These are researched envelopes, not a guarantee. Measure your own vehicle — the numbers here tell you what to expect, not what you have.

Supercrew Likely

Location	underseat, SuperCrew — no Goose Gear/seat-delete coverage found for this older generation (their product line starts at 2015+), so this envelope is inferred from audio-industry products only
Outer bounding box	Inferred lower bound from the two reference builds: at least large enough for a dual-12" at 0.7 ft3/sub (Rockville) or dual-10" at 1.35 ft3 total / 6" mounting depth (Fox Acoustics) Vehicle-specific enclosure catalogues; published box footprints are lower bounds on the cavity, not the cavity: NET Audio '2004-2008 Ford F150 SuperCrew Sub Box Dual Sealed': 51 x 13 x 8 in (as printed; axes not labelled), 1.1 ft3, under seat; NET Audio '2004-2008 Ford F150 SuperCrew Sub Box Single Sealed': 32 x 13 x 8 in (as printed; axes not labelled), 0.65 ft3, under seat. Vehicle-specific enclosure catalogues; published box footprints are lower bounds on the cavity, not the cavity: Ground Shaker 'BLACK 8" SINGLE SEALED SUB BOX, FITS 04-08 FORD F-150 EXTENDED & CREW-CAB': Height 6 1/4", Length 31 3/4", Depth 13 1/4" (labelled by Ground Shaker), 0.62 FT^3, under rear seat, driver side; Ground Shaker 'BLACK 8" DUAL SEALED SUB BOX, FITS 04-08 FORD F-150 EXTENDED & CREW-CAB': Height 6", Length 50 1/4", Depth 13 1/4" (labelled by Ground Shaker), 1.18 FT^3, under rear seat.
Known obstructions	None specifically documented, though the fitment caveat already in this page (only 2008 model year confirmed clean) suggests the cavity shape may not be perfectly consistent across 2004-2008
Usable volume estimate	1.35 ft³

Starting points

Suggested configurations for this vehicle, not prescriptions. Run the numbers in the Box Builder before you buy anything.

Budget

Subwoofers	1x10" sealed
Box type	sealed
Location	under rear seat

Enthusiast

Subwoofers	2x10" or 2x12" sealed
Box type	sealed
Location	under rear seat, confirm seat-lift-kit need before assuming clean fit on pre-2008 model years

Door speaker fitment

Sizes and depths below are what research turned up for this generation. Confirm against your own vehicle before cutting or ordering — trim levels vary.

Front doors Solid

Factory speaker size	6x8" or 5.25" (grille pries off for access)
Known obstructions	None specifically documented
Adapter bracket needed	unconfirmed
Tweeter	Not independently confirmed as a factory location for this specific 2004-2008 range. Sony Sound Systems were available on 'select 2003-2014 Ford vehicles' per general sourcing, and a named aftermarket SAIL PANEL tweeter pod product exists specifically for '04-08 F-150' — but neither confirms an OEM factory tweeter for this exact generation the way the 2009-2014 page's 1.646" A-pillar tweeter is confirmed. Genuinely unresolved; do not assume the newer generation's spec carries backward.

Rear doors Solid

Factory speaker size	6x8" (5.25" also fits in brackets) — SuperCrew only, requires full door panel removal (not just grille)
Known obstructions	None specifically documented
Adapter bracket needed	unconfirmed

Factory audio integration

Factory amp / premium audio	Sony Sound Systems were available on 'select 2003-2014 Ford vehicles' per general sourcing, suggesting this generation likely had a Sony premium tier — but exact per-trim breakdown and tweeter spec were not independently confirmed for this specific 2004-2008 range (contrast with the 2009-2014 page's confirmed 1.646" A-pillar tweeter).
Adding subs without a head-unit swap	Likely straightforward given the era (pre-touchscreen-integration trend) but not independently confirmed
Head unit	No replacement needed

Mounting locations

Supercrew Likely

under rear seat

Commercial specs: Rockville REC51 dual 12" (0.7 ft3 per sub, 5/8" MDF); Fox Acoustics dual 10" (1.35 ft3 total, 9.125" mounting hole, 6" mounting depth); another dual-10" option at 0.55 ft3/chamber, 5.25" mounting depth. HONEST CAVEAT: at least one seller states clean, unmodified fitment is only VERIFIED for the 2008 model year SuperCrew specifically — earlier years in this range (2004-2007) are not confirmed without modification. Some boxes also require a 2.5" seat lift kit. Don't treat this generation's fitment as uniformly solved across all 5 years.

Builds and products found for this vehicle

Outside links. Some are commercial products, some are owner builds posted on forums — the label says which. We do not endorse any of them.

Rockville (2 x 12", sealed) off-the-shelf
Dual 12" enclosure, 0.7 ft3 per sub, 5/8" MDF, bed liner finish
Fox Acoustics (2 x 10", sealed) off-the-shelf
Dual 10" enclosure, 1.35 ft3 total air volume, 9.125" mounting hole, 6" mounting depth, bed liner coating. NOTE: this same product is also listed as fitting Super Cab through 2014 — a different body style, don't conflate its year range with SuperCrew's more limited 2004-2008 window.
NET Audio (sealed) off-the-shelf
2004-2008 Ford F150 SuperCrew Sub Box Dual Sealed. NET Audio states fit years 2004-2008 (SuperCrew). Published outside dimensions: 51 x 13 x 8 in (as printed; NET Audio does not label the axes). Published volume: 1.1 ft3. Mounting depth 4.75 (5.25 with steel bump) in. Type: sealed. Location: under seat.
NET Audio (sealed) off-the-shelf
2004-2008 Ford F150 SuperCrew Sub Box Single Sealed. NET Audio states fit years 2004-2008 (SuperCrew). Published outside dimensions: 32 x 13 x 8 in (as printed; NET Audio does not label the axes). Published volume: 0.65 ft3. Mounting depth 4.75 (5.25 with steel bump) in. Type: sealed. Location: under seat.
NET Audio (sealed) off-the-shelf
2004-2008 Ford F150 Extended Cab Sub Box Dual Sealed. NET Audio states fit years 2004-2008 (SuperCab). Published outside dimensions: 51 x 13 x 8 in (as printed; NET Audio does not label the axes). Published volume: 1.1 ft3. Mounting depth 4.75 (5.25 with bump plates) in. Type: sealed (NET Audio also lists a ported version, same outside dimensions). Location: under seat.
NET Audio (sealed) off-the-shelf
2004-2008 Ford F150 Extended Cab Sub Box Single Sealed. NET Audio states fit years 2004-2008 (SuperCab). Published outside dimensions: 32 x 13 x 8 in (as printed; NET Audio does not label the axes). Published volume: 0.65 ft3. Mounting depth 4.75 (5.25 with bump) in. Type: sealed. Location: under seat.

Show 22 more

NET Audio (sealed) off-the-shelf
2004-2008 Ford F150 Standard Cab Sub Box Double Sealed. NET Audio states fit years 2004-2008 (Regular Cab). Published outside dimensions: 58 x 10 x 18 in (as printed; NET Audio does not label the axes). Published volume: 3.24 ft3. Mounting depth 7.5 in. Type: sealed (NET Audio also lists a ported version, same outside dimensions). Location: behind seat.
NET Audio (sealed) off-the-shelf
2004-2008 Ford F150 Standard Cab Sub Box Small Sealed. NET Audio states fit years 2004-2008 (Regular Cab). Published outside dimensions: 32 x 10 x 18 in (as printed; NET Audio does not label the axes). Published volume: 2 ft3. Mounting depth 7.5 in. Type: sealed. Location: behind seat.
Zenclosures (sealed) off-the-shelf
Ford F150 SuperCrew Crew Cab 2004-2008 Single Subwoofer Box. Zenclosures states fit years 2004-2008 (SuperCrew). No outside dimensions on the product page. Published volume: approx 0.60 ft3 per sub/side. Mounting depth 5.25 (optional 5.875) in. Type: sealed. Location: under seat, down firing.
Skar Audio (2 x 10", sealed) off-the-shelf
Dual 10" 1,600W Loaded Subwoofer Enclosure for 2004-2008 Ford F-150 Super Cab (L-VD-VS-2X10FORD-2004-2008-F150SUPERCAB). Skar Audio lists the 2004-2008 SuperCab and the 2008 SuperCrew; it says the 2004-2007 SuperCrew may need modification. Outside dimensions: not recorded here — check Skar's product page. Type: sealed. Location: under the rear seat of the super cab.
SRQ Customs (other (sealed/ported not stated by the maker)) off-the-shelf
Ford F-150 Extended Cab Enclosure 2005-2014. SRQ Customs states fit years 2005-2014 (SuperCab). Of the 2004-2008 model years here, it covers 2005-2008 only. Published outside dimensions: 40 x 16 x 16 in (as printed; SRQ Customs does not label the axes). Published volume: 0.8 ft3. Type: sealed/ported not stated. Location: under the back seat on the driver side; extended cab only.
Zenclosures (sealed) off-the-shelf
FORD F150 STANDARD CAB 2004-2015 SUBWOOFER BOX. Zenclosures states fit years 2004-2015 (Standard Cab). Of the 2004-2008 model years here, it covers all of them. No outside dimensions on the product page. Published volume: approx 1.60 ft3 one chamber. Mounting depth 6.375 (optional 7.00) in. Type: sealed (hole cutouts adjustable on request). Location: down firing, fits along the cab wall.
NET Audio (ported) off-the-shelf
2004-2008 Ford F150 Extended Cab Sub Box Large Ported. NET Audio states fit years 2004-2008 (SuperCab). Published outside dimensions: 51 x 13 x 8 in (as printed; NET Audio does not label the axes). Published volume: 1.1 ft3. Mounting depth 4.75 (5.25 with steel bump plates) in. Type: ported (tuned about 34-37 Hz). Location: under seat; NET says the floor jack and tire tools under the passenger seat must be removed (the sealed single/dual boxes above are described as keeping jack access).
JL Audio Stealthbox SB-F-F1502/10W3v3/DG (1 x 10", sealed) off-the-shelf
JL Audio SB-F-F1502/10W3v3/DG Stealthbox for Ford F-150, one 10W3v3. The retailer states fit: 2004-2014 F-150 SuperCab, 2004-2008 SuperCrew and 2006-2008 Lincoln Mark LT, black (cloth) interior. No dimensions, volume or location on the page. The listing names the SuperCrew only through 2008; the 2009-on SuperCrew takes a different JL part.
Ground Shaker (sealed) off-the-shelf
BLACK 8" DUAL SEALED SUB BOX, FITS 04-08 FORD F-150 EXTENDED & CREW-CAB (SKU GS-ZF15028B). Ground Shaker states fit years 04-08 for Ford F-150 Extended & Crew-Cab. Published outside dimensions: Height 6", Length 50 1/4", Depth 13 1/4" (labelled by Ground Shaker). Published volume: 1.18 FT^3. Mounting depth 5". Type: sealed. Location: under rear seat; upward firing. The same outside dimensions, volume and mounting depth are printed for these related listings: 10" dual [GS-ZF150210B]; 12" dual [GS-ZF150212B]; 8" dual [GS-ZF150KK28B] (SoloBaric variant); 10" dual [GS-ZF150L7T210B] (L7T variant).
Ground Shaker (sealed) off-the-shelf
BLACK 8" SINGLE SEALED SUB BOX, FITS 04-08 FORD F-150 EXTENDED & CREW-CAB (SKU GS-ZF15018B). Ground Shaker states fit years 04-08 for Ford F-150 Extended & Crew-Cab. Published outside dimensions: Height 6 1/4", Length 31 3/4", Depth 13 1/4" (labelled by Ground Shaker). Published volume: 0.62 FT^3. Mounting depth 5 1/2". Type: sealed. Location: under rear seat, driver side; upward firing. Maker notes: FITS ON DRIVER SIDE. The same outside dimensions, volume and mounting depth are printed for these related listings: 10" single [GS-ZF150110B]; 12" single [GS-ZF150112B]; 10" single [GS-ZF150L7T110B] (L7T variant).
Ground Shaker (sealed) off-the-shelf
BLACK 12" DUAL SEALED SUB BOX, FITS 01-23 FORD F-150 CREW-CAB (SKU GS-MF150212B). Ground Shaker states fit years 01-23 for Ford F-150 Crew-Cab. Published outside dimensions: Front Height 8 1/2", Rear Height 5", Length 44", Depth 12 1/4" (labelled by Ground Shaker). Published volume: 1.35 Cubic Ft. Mounting depth 4 3/4". Type: sealed. Location: under rear seat; upward firing. Maker notes: Air volume line is labelled 'Total Air Volume'. The same outside dimensions, volume and mounting depth are printed for these related listings: 10" dual [GS-MF150210B].
Sound Off Audio (other (sealed/ported not stated by the maker)) off-the-shelf
2004-2008 FORD F150 EXTENDED CAB DUAL SUB BOX (SKU F150 EC 04-08 DUAL). Sound Off Audio states fit years 2004-2008 for Ford F150 Extended Cab. No outside dimensions on the product page. Published volume: 0.55 cubic foot per sub. Mounting depth 5.25 inches. Subwoofers: Fits two 8 inch or 10 inch subwoofers (or single 8 or 10 inch sub). Location: Subwoofers fire down.
Sound Off Audio (other (sealed/ported not stated by the maker)) off-the-shelf
2004-2008 FORD F150 SUPERCREW DUAL SUB BOX (SKU F150 SCREW 04-08 DUAL). Sound Off Audio states fit years 2004-2008 for Ford F150 SuperCrew. No outside dimensions on the product page. Published volume: 0.6 cubic feet per subwoofer. Mounting depth 5.25 inches. Subwoofers: Fits two 8-inch or 10-inch subwoofers, or single 8 or 10-inch sub. Location: Subwoofers fire down under rear seat.
Sound Off Audio (other (sealed/ported not stated by the maker)) off-the-shelf
CONSOLE SUB BOX 2004-2008 FORD F150 SUPERCREW (SKU F150 SCREW 04-08 CONSOLE). Sound Off Audio states fit years 2004-2008 for Ford F150 SuperCrew. No outside dimensions on the product page. Published volume: 1.1 cubic feet (per sub). Mounting depth 9 inches. Subwoofers: Single 8, Single 10, or Single 12. Location: Behind center console, rests on floor in rear; FIRES DOWN.
Sound Off Audio (other (sealed/ported not stated by the maker)) off-the-shelf
DUAL SUB BOX 2004-2008 FORD F-150 Regular Cab (SKU F150 STD 04-08 DUAL). Sound Off Audio states fit years 2004-2008 for Ford F-150 Regular Cab. No outside dimensions on the product page. Published volume: 0.8 cubic ft per chamber. Mounting depth 6 3/8 inches. Subwoofers: Dual 8, dual 10, or dual 12 inch subwoofers (also fits triple tens). Location: Rear, fires down.
Sound Off Audio (other (sealed/ported not stated by the maker)) off-the-shelf
Single Sub Box 2004-2008 Ford F-150 Extended Cab (SKU F150 EC 04-08 SINGLE). Sound Off Audio states fit years 2004-2008 for Ford F-150 Extended Cab. No outside dimensions on the product page. Published volume: 0.55 cubic foot (per sub). Mounting depth 5.25 inches. Subwoofers: One 8 inch or one 10 inch subwoofer. Location: Driver's side under rear seat.
Sound Off Audio (other (sealed/ported not stated by the maker)) off-the-shelf
Single Sub Box 2004-2008 FORD F150 SUPERCREW (SKU F150 SCREW 04-08 SINGLE). Sound Off Audio states fit years 2004-2008 for Ford F150 SuperCrew. No outside dimensions on the product page. Published volume: 0.55 cubic foot (per sub). Mounting depth 5.25 inches. Subwoofers: Fits one 8 inch or one 10 inch subwoofer. Location: Driver's side under rear seat.
Super Crew Sound (2 x 12", other (sealed/ported not stated by the maker)) off-the-shelf
Ford F-150 Extended Cab / Super Cab 2004-2008 Dual 12" Subwoofer Box (SKU 04F150ECUTSdual12). Super Crew Sound states fit years 2004-2008 for Ford F-150 Extended Cab / Super Cab. No outside dimensions on the product page. Published volume: 0.95 cubic foot per sub. Mounting depth 6.25" (optional 6 7/8" available). Subwoofers: Dual 12". Firing: Subs fire down. Maker notes: Requires a 2.5" seat lift kit (designed to fit the LMI welding lift kit (seat lifts up 2.5" and forward 2"). Jack must be removed. Hole cutouts 8" 7", 10" 9 1/8", 12" 11".
Super Crew Sound (sealed) off-the-shelf
Ford F-150 Extended Cab / Super Cab 2004-2008 Dual Subwoofer Box (SKU 04F150ECUTSdual). Super Crew Sound states fit years 2004-2008 for Ford F-150 Extended Cab / Super Cab. No outside dimensions on the product page. Published volume: .60 cubic foot Per Sub. Mounting depth 5.25" (Optional 5 7/8" available). Type: Sealed design. Subwoofers: Fits 8 or 10 inch subwoofers; Dual subwoofers. Firing: Subs fire down. Maker notes: No seat modification needed; Jack must be removed. Hole cutouts 8" 7", 10" 9 1/8".
Super Crew Sound (other (sealed/ported not stated by the maker)) off-the-shelf
Ford F-150 Extended Cab / Super Cab 2004-2008 Single Subwoofer Box (SKU 04F150ECUTSsingle). Super Crew Sound states fit years 2004-2008 for Ford F-150 Extended Cab (Super Cab). No outside dimensions on the product page. Published volume: .60 cubic foot. Mounting depth 5.25" (optional 5.875" available). Subwoofers: Fits 8 or 10 inch. Firing: Sub fires down. Maker notes: No seat modification needed. 1 1/4" clearance under the box. Hole cutouts 8" 7", 10" 9 1/8". MDF.
Super Crew Sound (2 x 12", other (sealed/ported not stated by the maker)) off-the-shelf
Ford F-150 Supercrew Cab 2004-2008 Dual 12" Subwoofer Box (SKU 04F150SCrewUTSdual12). Super Crew Sound states fit years 2004-2008 for Ford F-150 Supercrew Cab. No outside dimensions on the product page. Published volume: 0.95 cubic foot per sub. Mounting depth 6.25" (Optional 6 7/8" available). Subwoofers: Dual 12". Location: Under rear seat; Subs fire down. Maker notes: Requires a 2.5" seat lift kit (designed to fit the LMI welding lift kit). Jack must be removed. Will not fit Alpine type R 12" Subwoofers. Hole cutouts 8" 7", 10" 9 1/8", 12" 11".
Super Crew Sound (other (sealed/ported not stated by the maker)) off-the-shelf
Ford F-150 Supercrew Cab 2004-2008 Dual Subwoofer Box (SKU 04F150SCrewUTSdual). Super Crew Sound states fit years 2004-2008 for Ford F-150 Supercrew Cab. No outside dimensions on the product page. Published volume: .60 cubic foot Per Sub. Mounting depth 5.25" with optional 5 7/8" available. Subwoofers: Fits 8 or 10 inch subwoofers. Firing: Subs fire down. Maker notes: No seat modification needed. Hole cutouts 8" 7", 10" 9 1/8". MDF.

Build it for this vehicle

Design a box for this vehicle — Enclosure volume, port tuning, and a see-through render.
Door speaker fitment — No measured door depth on file for this vehicle yet, so there is no fit check to run. The page says how to request one.
See the factory speaker locations — Factory speaker sizes, depths and locations we have researched for this vehicle.

Each link opens the tool with this vehicle already selected.

Before you cut anything

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.