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I N S T A L L A T I O N   G U I D E 

for the 

SB-F-MUSCPE/12TW3 

SKU# 94617

2015 - Up Ford Mustang Coupe

Thank you for choosing a JL Audio Stealthbox® for your automotive sound system.  

With proper installation, your new vehicle-specific enclosed subwoofer system  

will deliver years of listening pleasure.

We strongly recommend that you have your new Stealthbox® installed by your 

authorized JL Audio dealer. The installation professionals employed by your 

dealer have the necessary tools and experience to disassemble and reassemble 

your vehicle properly.  If you prefer to perform your own installation, please read 

this installation guide completely before beginning the process.

  

If you choose to perform the installation yourself, it is absolutely vital 

that the Stealthbox

®

 be properly mounted to the vehicle according to 

these instructions.  Failure to mount the enclosure properly presents two 

problems:  
1)  The sub-bass performance will suffer due to the movement of the 

enclosure caused by the force exerted by the woofer(s).

2)  A loose enclosure presents a serious safety hazard in the event of a 

collision or sudden deceleration.

INSTALLATION

DIFFICULTY:

ESTIMATED TIME:

1-2 HOURS

 

Enclosure Type:

  Sealed

 

Driver Type:

  12TW3-D4

 

Nominal Impedance:

  2 ohms

 

Continuous Power Handling:

  400 watts (RMS method)

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SB-F-MUSCPE/12TW3  INSTR_SKU# 011432

Summary of Contents for Stealthbox SB-F-MUSCPE/12TW3

Page 1: ...own installation please read this installation guide completely before beginning the process If you choose to perform the installation yourself it is absolutely vital that the Stealthbox be properly mounted to the vehicle according to these instructions Failure to mount the enclosure properly presents two problems 1 The sub bass performance will suffer due to the movement of the enclosure caused b...

Page 2: ...INCLUDED HARDWARE Continued on Next Page Page 2 JL Audio Inc 2015 SB F MUSCPE 12TW3 INSTR_SKU 011432 Not shown 1 150834 Trim Panel 1 151507 Velcro Strip ...

Page 3: ... CONNECTIONS Using quality power signal and speaker wire is essential in ensuring the performance of your Stealthbox JL Audio recommends using a 4 AWG power kit such as the XD PCS4 1B for your Stealthbox amplifier Other kits are available should you be using more than one amplifier Signal wire such as the JL Audio Premium Audio Interconnect Cables should be used to provide signal for both channels...

Page 4: ... Note Steps 5 13 are only necessary in vehicles equipped with the factory subwoofer If vehicle does not have the factory subwoofer skip to Step 14 Remove the three T 20 Torx screws securing the lower trim panel to the factory subwoofer enclosure and remove the trim panel STEP 4 Remove the clip holding the top of the trunk liner to the vehicle on the passenger side STEP 3 Carefully unclip the trunk...

Page 5: ... factory hole in the floor Use a heat gun to soften the Plastic Plug allowing it to take the shape of the factory hole It may be necessary to add silicone adhesive to hold the Plastic Plug in place STEP 12 Fold the trunk liner flap out of the way to expose the other factory threaded hole in the floor Thread an M8 70 mm Set Screw into the factory threaded hole Place a 1 OD x 1 2 Steel Spacer over t...

Page 6: ...TEP 21 Press the top of the trunk liner down against the 3 8 16 x 2 1 2 Set Screw and cut a small X in the trunk liner over the screw STEP 20 Thread the 3 8 16 x 2 1 2 Set Screw into the 3 8 16 U Nut as far as it will go STEP 19 Note Steps 19 27 are necessary for all models Slide a 3 8 16 U Nut over the hole in the brace near the passenger side taillight harness as shown If a factory U nut is alre...

Page 7: ...j l audi o com JLA SKU 011432 ver 05 12 2015 10369 NORTH COMMERCE PARKWAY MIRAMAR FLORIDA 33025 USA CONGRATULATIONS You have completed the installation for this model Enjoy your new Stealthbox How we play SB F MUSCPE 12TW3 INSTR_SKU 011432 STEP 28 Note Step 28 is only necessary in vehicles equipped with the factory subwoofer Apply Velcro to the bottom of the trim panel as shown and secure it to th...

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