Home
/
All Products
/
W8K9 8" Dual 4-Ohm Subwoofers 2-Pack + Dual 8" Ford F-150 Super Crew Box Bundle
W8K9 8" Dual 4-Ohm Subwoofers 2-Pack + Dual 8" Ford F-150 Super Crew Box Bundle
1
/
of
14
Rockville
W8K9 8" Dual 4-Ohm Subwoofers 2-Pack + Dual 8" Ford F-150 Super Crew Box Bundle
W8K9 8" Dual 4-Ohm Subwoofers 2-Pack + Dual 8" Ford F-150 Super Crew Box Bundle
Underseat Dual 8" Ported Kit, 2 Subs, 0.8 cu ft/ea, Enclosure, Install Hardware
Free Shipping
Regular price
$394.85
Sale price
$394.85
Regular price
$0.00
Unit price
/
per
Features
- Two 8" dual 4-ohm subs, 500W RMS each
- Ported dual 8" box for 2009+ F-150 Super Crew
- Ultra-stiff cones, cast aluminum frames
- Includes 14 AWG wire, screws, terminals
- 35 Hz tuning for rich low-end impact
Couldn't load pickup availability
What's Included in the box
- (2) Rockville W8K9D4 8" subwoofers
- Dual 8" Ford F‑150 Super Crew ported enclosure
- Install kit: 20 screws, 20' 14 AWG wire, 4 spade terminals
SKU: SKU: (2) W8K9D4+REC111+K2
View full details













Product Description
Elevate your truck’s soundstage with a purpose-built bass solution. This package pairs two K9‑series 8" subwoofers with a 35 Hz–tuned, underseat ported enclosure designed for Ford F‑150 Super Crew. Expect deep, controlled lows and quick transients thanks to USA‑wound 2.5" coils, rigid cones, and high‑BL motor gaps. The bed‑liner finish and braced ¾" MDF construction deliver durability and acoustic integrity. Included wiring hardware supports a clean, secure install. A sophisticated, space‑savvy system for daily driving and weekend playlists.
Features
Tuned For Musicality
Optimized air space and port tuning balance deep extension with tight, responsive punch.
Rugged, Refined Build
Bed-liner coated ¾" MDF enclosure resists wear while minimizing panel resonance for cleaner bass.
Consistent Thermal Handling
2.5" OFC voice coils and vented T‑yokes dissipate heat for sustained output.
High-Control Motor
Double-stacked magnets and stiff suspensions keep cones linear at elevated excursion.
Install-Ready Accessories
Includes quality 14 AWG wire, fasteners, and spades to complete the enclosure hookup.
Technical Specifications
- Type Dual 8" underseat subwoofer and enclosure bundle
- Compatible vehicles 2009–2024 Ford F‑150 Super Crew; 2017–2024 F‑250/F‑350
- Enclosure air space 0.8 cu ft per sub
- Enclosure tuning 35 Hz
- Sub impedance (each) Dual 4 ohm
- Voice coil diameter 2.5 in
- Magnet weight (each) 122 oz
- Cutout diameter 7.32 in
- Mounting depth 5.91 in (sub), 11.25 in (box max)
- Sensitivity 81.2 dB
- Frequency response 48–800 Hz (sub)
- Weight Sub: 18.74 lb each (approx.)
- Dimensions Underseat front-fire; see vehicle-specific box specs