JL AUDIO 94688 Stealthbox For 2018-Up Ford Expedition Installation Guide
- June 4, 2024
- JL AUDIO
Table of Contents
JL AUDIO 94688 Stealthbox For 2018-Up Ford Expedition
IMPORTANT
- Installation requires appropriate tools and safety equipment. Professional installation is recommended.
- If you prefer to perform your own installation, please read this installation guide completely before beginning.
- Before cutting or drilling, check for potential obstacles behind mounting surfaces.
- Mount this product securely to prevent damage or injury in severe conditions.
Specification
- Enclosure Type: Sealed
- Driver Type: 1 0TWl-2
- Nominal Impedance: 2 ohms
- Continuous Power Handling: 300 watts (RMS method)
INCLUDED HARDWARE
Description
POWER RECOMMENDATION
JL Audio recommends high-quality amplifiers such as the JL Audio XD300/lv2.
The diagram below shows the recommended crossover settings for the XD300/lv2.
For a detailed description of the amplifier settings, consult the owner’s
manual for the amplifier. If another amplifier is being used, please reference
this illustration and use similar settings on that amplifier. 
CONNECTIONS
Using quality power, signal, and speaker wire is essential in ensuring the performance of your Stealth box. JL Audio recommends using a 4 AWG power kit such as the XD-PCS4-1 B for your Stealthbox amplifier. Other kits are available should you be using more than one amplifier. Signal wires such as the JL Audio Premium Audio Interconnect Cables should be used to provide a signal for both channels of the amplifier. JL Audio recommends using 12 AWG speaker wires for subwoofers such as our XC-BCS12-25.
STEP 1
Empty the cargo area and the rear seat on the driver’s side.
STEP 2
Carefully unclip and remove the upper cargo trim panel.
STEP 3
Carefully unclip and remove the lower cargo sill panel.
STEP 4
Fold up the cargo floor to access the storage pocket retaining screws, and
remove the screws. Remove the jack mounting screw, and remove the jack from
the vehicle.
STEP 5
Disconnect the wiring harness from the front of the storage pocket, then
remove the pocket from the vehicle.
STEP 6
Remove the rear seat bolts from the driver’s side rear seat.
STEP 7
From inside the vehicle, carefully unclip the screw covers from the rear seat
brackets.
STEP 8
Remove the front seat bolts from the driver’s side rear seat. Tilt the rear
seat backward. Remove the two center seat bolts and the one seat belt bolt.
Disconnect the seat belt harness, then remove the rear seat from the vehicle.
STEP 9
Open the upper seat belt bolt cover, then remove the seat belt bolt.
STEP 10
Carefully unclip and remove the rear door sill panel and the seat belt trim
panel on the driver’s side. Remove the seat belt bolt.
STEP 11
Remove the screws from the side panel on the driver’s side.
STEP 12
Carefully unclip and remove the (-pillar and D-pillar, then unclip and remove
the side panel from the vehicle.
STEP 13
Remove the factory subwoofer enclosure mounting screws.
STEP 14
Disconnect and remove the factory subwoofer.
STEP 15
Slide a 1/4″ Split Lock Washer and a 1/4″ Flat Washer over a 1/4 – 20 x 1″ Hex
Head Screw. Pass the assembly through the slot in the Bottom Bracket, into the
threaded insert on the back of the enclosure, as shown, and hand tightens. See
the illustration on Page 2 for more detail.
STEP 16
Repeat the process from STEP 15 for the Top Front Bracket and Top Rear
Bracket, as shown. See the illustration on Page 2 for more detail.
STEP 17
Place the Stealthbox• into position, as shown. Slide an MB Split Lock Washer
and a 5/16″ ID, 1-1/4″ OD Flat Washer over an MB x 1.25 mm, 25 mm Hex Head
Screw, then loosely thread the assembly into the indicated factory hole to
help hold the enclosure in place. Align the Top Front Bracket and Top Rear
Bracket to the factory holes in the vehicle, then carefully remove the
enclosure to fully tighten all four 1/4 – 20 x l” Hex Head Screws.
STEP 18
Apply Foam Tape to the landings of the Top Front Bracket, Top Rear Bracket,
and Bottom Bracket where they will contact the vehicle, then reinstall the
enclosure and the MB assembly. Slide an M6 Split Lock Washer and a 1/4″ Flat
Washer over an M6 x 1 mm, 20 mm Hex Head Screw, pass the assembly through the
slot in the Top Front Bracket, and into the factory hole. Repeat the process
for the Top Rear Bracket.
STEP 19
Apply Foam Tape to the slotted end of the Front Bracket where it will contact
the vehicle. Slide a 1/4″ Split Lock Washer and a 1/4″ Flat Washer over a 1/4
– 20 x l” Hex Head Screw. Pass the assembly through the slot in the opposite
end of the Front Bracket and into the threaded insert in the front of the
enclosure. Repeat the M6 assembly process to secure the Front Bracket to the
vehicle.
STEP 20
Align the Stealthbox<», as shown, then fully tighten the three M6 x 1 mm, 20
mm Hex Head Screws and the MB x 1.25 mm, 25 mm Hex Head Screw. Connect speaker
cable to the terminal cup on the top of the enclosure, and route the cable as
necessary.
STEP 21
Reinstall the side panel, side panel screws, D-pillar, and C-pillar.
STEP 22
Reinstall the seat belt bolt, seat belt trim panel, and rear door sill panel.
STEP 23
Reinstall the rear seat belt bolt and cover.
STEP 24
Reinstall the rear seat, seat belt harness, seat belt bolt, seat bolts, and
covers.
STEP 25
Reinstall the storage pocket and screws. Reinstall the jack.
STEP 26
Reinstall the cargo sill panel and the upper cargo door trim panel.
CONGRATULATIONS!
You have completed the installation for this model! Enjoy your new Stealth box
!
MID/HIGH-FREQUENCY DRIVER FITMENT
A variety of JL Audio coaxial and component systems will fit in the factory
speaker locations of your vehicle. 
Trademarks
All specifications are subject to change without notice JL Audio” and “How we play”are registered trademarks of JL Audio, hc. Ahead of the Gurv” and its respective logo are trademarks of JL Audio, hc Printed in USA 2021 JL Audio, hc For more detailed information please Msitus online at www.jlaudio.com. (854] 443-1100 I
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