JL Audio SMS-C-CTS/PREM User manual

INSTALLATION GUIDE
for the
SMS-C-CTS/PREM
SMS-C-CTS/BASE
SKU# 94553/94554
2008 & Up Cadillac CTS/CTS-V
Thank you for choosing a JL Audio StealthMod® System for your automotive sound system.
With proper installation, your new vehicle-specific audio system
will deliver years of listening pleasure.
We strongly recommend that you have your new StealthMod® System 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.
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SMS-C-CTS INSTR_SKU# 011357
INSTALLATION
DIFFICULTY:
55
OUT
OF
ESTIMATED TIME:
5+ HOURS
STEALTHBOX® SPECIFICATIONS
Enclosure Type: Sealed
Driver Type: 10TW3-D4
Nominal Impedance: 2 ohms
Continuous Power Handling: 400 watts (RMS method)
INCLUDED EQUIPMENT
(1) HD-RLC
Premium System Only: Base System Only:
(1) XD700/5 Amplifier (1) XD500/3 Amplifier
(1) C5-650cw Speakers (1) Pair C5-650x Speakers
(1) Pair C2-350x Speakers
INCLUDED HARDWARE
(1) Rear Bracket (1) Amplifier Bracket
(1) Side Bracket (4) 1/4 - 20 x 5/8” Pan Head Screw
(2) 3/8 - 16 x 1” Hex Bolt (4) 1/4 “ Flat Washer
(4) 3/8” Flat Washer (4) 1/4 - 20 Keps Nut
(3) 3/8” x 1-1/4” Diameter Flat Washer (1) 8’ Power Wire
(5) 3/8” Lock Washer (1) 18” Ground Wire
(5) 3/8 16 Hex Nut (1) 8’ Remote Turn-on Wire
(3) 3/8 -16 U-Nut (1) 4’ 12 Gauge Speaker Cable
(3) 3/8” x 2-1/4” Set Screw (1) Mini Fuse Holder
(2) 6mm x 1.0 Flange Nut (1) 3 amp Mini Fuse
(4) 0.80 Thin Foam Strip (1) XD-MFB-MAXI Fuse Holder
(2) 0.875 Thick Foam Strip (1) XD-MAXI-60 60 amp Fuse
(1) XB-MGLU Ground Lug (1) XD-CLRAICY-1F2M Y-adaptor
Premium System Only: Base System Only:
(5) Speaker Wire to RCA Adaptor (3) Speaker Wire to RCA Adaptor
(1) 38’ 16 Gauge Speaker Cable (1) 32’ 16 Gauge Speaker Cable
(2) CTS-V Door Speaker Adaptor (2) CTS Door Speaker Adaptor
(2) Dash Speaker Adaptor (2) 12 ohm, 10 watt resistor / 2.2 uf capacitor
(24) #8 x 1-1/4” Pan Head Screw (8) #8 x 7/8” Pan Head Screw
(4) #8 x 3/4” Pan Head Screw (24) #8 x 3/4” Pan Head Screw
(4) Speed Clip (8) Speed Clip
(2) Crossover Bracket
StealthMod ®

SMS-C-CTS INSTR_SKU# 011357
POWER RECOMMENDATION
The diagram below shows the recommended crossover settings for the XD700/5 in the Premium System. For a detailed description of the amplier settings, consult the owner’s manual for the amplier.
Continued on Next PagePage 2 • JL Audio, Inc., 2013

SMS-C-CTS INSTR_SKU# 011357
POWER RECOMMENDATION
The diagram below shows the recommended crossover settings for the XD500/3 in the Base System. For a detailed description of the amplier settings, consult the owner’s manual for the amplier.
Continued on Next PagePage 3 • JL Audio, Inc., 2013

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SMS-C-CTS INSTR_SKU# 011357
Page 4 • JL Audio, Inc., 2013
STEP 4
Carefully unclip and remove the trunk sill panel.
STEP 8
Remove the two nuts that hold the computer bracket to the
fender well, and remove the bracket.
STEP 3
Unscrew each of the lower net buttons. Remove the trunk
floor panel.
STEP 7
Unclip the computer from the bracket located on the fender
well.
STEP 2
Unclip the covers around each of the upper tie-down hooks.
STEP 6
Pull both the driver’s side and passenger side of the trunk
liner away from the trunk wall.
STEP 1
Empty out the trunk of the vehicle.
Disconnect the negative battery post connection.
STEP 5
On the driver’s side of the trunk, unscrew the upper net
button. Remove each of the clips that hold the trunk liner in
place. Repeat for the passenger side.

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SMS-C-CTS INSTR_SKU# 011357
STEP 12
Refer to this illustration for clarity in Steps 13, 15, and 19.
STEP 16
Align the Side Bracket over the two lower computer bracket
studs. Secure the bracket with a pair of 6mm x 1.0 Flange
Nuts.
Slide a 3/8 - 16 U-Nut over the other hole in the Side Bracket.
ST EP 11
Locate the factory hole at the bottom of the trunk wall, and
enlarge the hole to 7/16”.
Before drilling, always make sure that you are not
going to be drilling into any gas lines, brake lines,
tires, transmission lines, electrical wiring, exhaust
systems or anything else that might cause a reduction
in your weekly pay.
Always wear eye protection when drilling!
STEP 15
Rotate the Rear Bracket back into position. Secure the top
of the Rear Bracket to the hole from the previous step using
a 3/8 - 16 x 1” Hex Bolt, two 3/8” Flat Washers, a 3/8” Lock
Washer, and a 3/8 -16 Hex Nut as illustrated in Step 12.
Firmly tighten both the upper and lower hardware.
Slide a 3/8 - 16 U-Nut over each of the other holes in the Rear
Bracket.
STEP 10
Remove the four nuts that hold the amplifier to the trunk
wall, and remove the amplifier.
STEP 14
Align the upper right side of the Rear Bracket vertically with
the raised porttion of the trunk wall as shown. Mark the
location of the upper hole on the trunk wall. Rotate the
bracket out of the way and drill a 7/16” hole on the mark.
Before drilling, always make sure that you are not
going to be drilling into any gas lines, brake lines,
tires, transmission lines, electrical wiring, exhaust
systems or anything else that might cause a reduction
in your weekly pay.
STEP 9
Unplug all of the harnesses from the factory amplifier.
STEP 13
Secure the bottom of the Rear Bracket to the hole from Step
11 using a 3/8 - 16 x 1” Hex Bolt, two 3/8” Flat Washers, a 3/8”
Lock Washer, and a 3/8 -16 Hex Nut as illustrated in Step 12.
Do not tighten at this time.
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SMS-C-CTS INSTR_SKU# 011357
Page 6 • JL Audio, Inc., 2013
STEP 20
Cut the Power Wire about 12” from the terminated end,
strip the end of the short section and connect it to the Fuse
Holder. Connect the terminated end to the positive battery
terminal.
Note: Do not install the fuse at this time.
STEP 24
Empty out the rear seat area of the vehicle.
STEP 19
Thread a 3/8 - 16 x 2-1/4” Set Screw through each of the 3/8
- 16 U-Nut on the Rear Bracket leaving approximately 1-1/4”
exposed as illustrated in Step 12.
STEP 23
Locate the hole at the top of the driver’s side of the trunk.
Scrape away the paint around the hole, and install the
Ground Lug in the hole as shown. Connect the Ground
Wire to the Ground Lug, and route the wire to the Amplifier
mounting location.
STEP 18
Reinstall the factory amplifier and reconnect each of the
wiring harnesses.
STEP 22
Connect the Mini Fuse Holder to the ignition wire shown.
Connect the Remote Turn-on Wire to the opposite end of
the Mini Fuse Holder, and route the wire to the Amplifier
mounting location.
Note: Do not install the fuse at this time.
STEP 17
Reinstall the computer bracket over the Side Bracket as
shown. Thread a 3/8 - 16 x 2-1/4” Set Screw through the 3/8 -
16 U-Nut, leaving approximately 1-1/4” exposed.
STEP 21
Strip the end of the long section of Power Wire, and connect
it to the opposite side of the Fuse Holder. Secure the Fuse
Holder to the vehicle. Route the Power Wire to the Amplifier
mounting location.

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SMS-C-CTS INSTR_SKU# 011357
Page 7 • JL Audio, Inc., 2013
STEP 28
Remove the rear seat back.
STEP 32
Remove the clips that hold the rear deck in place.
STEP 27
From inside the trunk, remove the four nuts that hold the
upper portion of the rear seat back in place.
STEP 31
Unclip and remove the pillar. Repeat for the opposite side.
STEP 26
Remove the four nuts that hold the lower portion of the rear
seat back in place.
STEP 30
Remove the screw.
STEP 25
Unclip and remove the rear seat cushion.
STEP 29
Carefully unclip the screw cover on the C-pillar.

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SMS-C-CTS INSTR_SKU# 011357
Page 8 • JL Audio, Inc., 2013
STEP 36
Pictured is the Amplifier Bracket and associated mounting
hardware.
STEP 40
Premium System Only:
Use the color code below for Steps 41 and 47-48.
L Door (+) = gray L Dash (+) = tan
L Door (-) = tan L Dash (-) = yellow
R Door (+) = dark green R Dash (+) = green
R Door (-) = light green R Dash (-) = violet
Sub (+) = green/black
Sub (-) = blue/white
STEP 35
Remove the factory subwoofer.
Note: Failure to remove the factory subwoofer will limit the
performance of the Stealthbox®.
STEP 39
Slide a 1/4 Flat Washer over each of the four 1/4 - 20 Pan
Head Bolts and drop them down from the top through the
holes made in the previous step.
Secure the Amplifier Bracket from the underside using four
1/4 - 20 Keps Nuts.
Secure the Amplifier to the Amplifier Bracket using four
Speed Clips and four #8 x 3/4” Pan Head Screws.
STEP 34
Remove the four factory subwoofer mounting bolts.
STEP 38
Drill 3/8” holes on the marks made in the previous step.
Before drilling, always make sure that you are not
going to be drilling into any gas lines, brake lines,
tires, transmission lines, electrical wiring, exhaust
systems or anything else that might cause a reduction
in your weekly pay.
Always wear eye protection when drilling!
STEP 33
Unclip and remove the rear deck.
STEP 37
Position the Amplifier Bracket as shown, and mark the
mounting hole locations on the underside of the rear deck.

Continued on Next Page
SMS-C-CTS INSTR_SKU# 011357
Page 9 • JL Audio, Inc., 2013
STEP 44
Push the driver’s side trunk liner back into position and cut
three holes in the liner to allow the three 3/8 - 16 x 2-1/4” Set
Screws to pass through. Cut a small “X” in the trunk liner to
allow the 12 Gauge Speaker Cable to pass through as well.
STEP 48
Premium System Only:
Connect the 16 Gauge Speaker Cable for the dash outputs
to the outputs for Channels 3-4. Connect the 16 Gauge
Speaker Cable for the dash inputs to a pair of Speaker to RCA
Adaptors, and plug them into Inputs 3-4.
STEP 43
Base System Only:
Cut the wires indicated in Step 20 three inches away from
the plug.
Route 5 pairs of 16 Gauge Speaker Cable to the factory
amplifier location. Connect a pair to each side of both the
plug side and wire side of the cut wires. Wires connected to
the plug side will be for input and wires connected to the
wire side will be for output. Route the 12 Gauge Speaker
Cable to the Stealthbox® location.
STEP 47
Connect the Power, Ground and Remote Turn-on to the
Amplifier. Connect the 12 Gauge Speaker Cable to the
subwoofer channel. Connect the 16 Gauge Speaker Cable
for the subwoofer output to a Speaker to RCA Adaptor and
Y-adaptor, and plug it into the Sub Inputs.
Connect the 16 Gauge Speaker Cable for the door outputs
to the outputs for Channels 1-2. Connect the 16 Gauge
Speaker Cable for the door inputs to a pair of Speaker to RCA
Adaptors, and plug them into Inputs 1-2.
STEP 42
Base System Only:
Use the color code below for Steps 43 and 47.
L Door (+) = gray
L Door (-) = tan
R Door (+) = dark green
R Door (-) = light green
Sub (+) = blue/white
Sub (-) = green/black
STEP 46
Slide a 3/8” Flat Washer, a 3/8” Lock Washer, and a 3/8 - 16
Hex Nut onto each of the three 3/8 - 16 x 2-1/4” Set Screws
and fully tighten.
Reinstall the subwoofer.
STEP 41
Premium System Only:
Cut the wires indicated in Step 20 three inches away from
the plug.
Route 9 pairs of 16 Gauge Speaker Cable to the factory
amplifier location. Connect a pair to each side of both the
plug side and wire side of the cut wires. Wires connected to
the plug side will be for input and wires connected to the
wire side will be for output. Route the 12 Gauge Speaker
Cable to the Stealthbox® location.
STEP 45
Using a Phillips head screwdriver, remove the subwoofer
from the Stealthbox®. Connect the 12 Gauge Speaker Cable
to the terminal cup, and place the empty enclosure into
position, allowing the three 3/8 - 16 x 2-1/4” Set Screws to
pass through the holes in the back of the enclosure.

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SMS-C-CTS INSTR_SKU# 011357
Page 10 • JL Audio, Inc., 2013
STEP 52
Unclip the screw cover behind the release handle and
remove the screw.
STEP 56
Pictured is a Door Speaker Adaptor and the necessary
hardware for installing the Speaker.
STEP 51
Begin the door speaker installation by opening the front
passenger door and rolling the window all the way down.
STEP 55
Steps 55-58 are for the Premium System only.
Remove the four screws that hold in the factory speaker.
Unplug and remove the speaker.
STEP 50
Adjust the settings of the amplifier as illustrated on Pages
2-3.
STEP 54
Starting at the bottom, carefully unclip and remove the door
panel.
STEP 49
Install the 3 Amp Mini Fuse into the Mini Fuse Holder and the
60 Amp MAXI Fuse into the MAXI Fuse Holder.
Reinstall the passenger side trunk liner, the floor panel, and
the trunk sill panel. Reinstall the rear deck, pillars, and rear
seat. Do not reinstall the factory subwoofer.
Reconnect the negative battery post connection.
STEP 53
Carefully unclip the cover on the pull handle and remove the
two screws.

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SMS-C-CTS INSTR_SKU# 011357
Page 11 • JL Audio, Inc., 2013
STEP 60
Remove the four screws that hold the speaker to the bracket.
STEP 64
Attach the remaining piece of Thin Foam to the Crossover
Bracket as shown.
STEP 59
Steps 59-67 are for the Base System only.
Remove the three screws that hold in the factory speaker
bracket. Unplug and remove the speaker bracket.
STEP 63
Using a 1/8” drill bit, drill through the lower three holes in the
Door Speaker Adaptor and into the factory speaker bracket.
Install a second Thin Foam Strip around the speaker hole in
the Door Speaker Adaptor. Save the remaining piece for the
next step.
Run three short pairs of 16 Gauge Speaker Cable through the
hole drilled in the previous step.
STEP 58
Attach a Thick Foam Strip around the outside of the Speaker
as shown.
Reinstall the door panel.
Repeat Steps 51-58 for the driver’s door.
STEP 62
Drill a 7/16” hole through the side of the factory speaker
bracket as shown.
Before drilling, always make sure that you are not
going to be drilling into any gas lines, brake lines,
tires, transmission lines, electrical wiring, exhaust
systems or anything else that might cause a reduction
in your weekly pay.
Always wear eye protection when drilling!
STEP 57
Install a Thin Foam Strip around the factory speaker hole.
Secure a Door Speaker Adaptor to the door using four #8
x 1-1/4” Flat Head Screws. Install a second Thin Foam Strip
around the hole in the Door Speaker Adaptor.
Using the color code in Step 40 as a guide, wire the
C5-650cw and secure it to the Door Speaker Adaptor using
eight #8 x 1-1/4” Pan Head Screws.
STEP 61
Reinstall the factory speaker bracket and install a Thin Foam
Strip around the speaker hole. Secure a Door Speaker
Adaptor to the factory speaker bracket using four #8 x 7/8”
Flat Head Screws.

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SMS-C-CTS INSTR_SKU# 011357
Page 12 • JL Audio, Inc., 2013
STEP 68
Begin the dash speaker installation by carefully unclipping
the driver’s side A-pillar from the top. Remove the pillar.
Repeat for the passenger side.
STEP 72
Using the color code in Step 40 as a guide, wire the C2-350x
Speaker, and secure the Speaker and Dash Speaker Adaptor
using the factory screws as shown.
Repeat for the driver’s side.
STEP 67
Using the color code in Step 42 as a guide, wire the input
wires for the Crossover. Connect the woofer and tweeter
wires to the C5-650x Speaker, and secure the Speaker to the
Door Speaker Adaptor using eight #8 x 3/4” Pan Head Screws.
Attach a Thick Foam Strip around the outside of the Speaker.
Reinstall the door panel.
Repeat Steps 51-54 and 59-67 for the driver’s side.
STEP 71
Steps 71-72 are for the Premium System Only.
Pictured are the Dash Speaker Adaptors.
STEP 66
Attach the 16 Gauge Speaker Cable to the Crossover as
dictated in the manual for the C5-650x Speakers. Set the
Midrange Presence jumper in the High position, and the
Tweeter Level jumper in the -3 dB position.
STEP 70
Unscrew the factory speaker from the passenger side.
Unplug and remove the speaker.
STEP 65
Slide a pair of Speed Clips over the Crossover mounting holes
in the Crossover Bracket, and secure the Crossover using
a pair of #8 x 3/4” Pan Head Screws. Secure the Crossover
Bracket to the door with the factory screw as shown.
STEP 69
Carefully unclip and remove the forward dash panel.

SMS-C-CTS INSTR_SKU# 011357
Page 13 • JL Audio, Inc., 2013
MID/HIGH FREQUENCY DRIVER FITMENT
A variety of JL Audio coaxial and component systems will t in the factory speaker locations of you vehicle.
Rear Speaker Size / Location: 5-1/4”- Rear Door
Fits JL Audio Models: TR525-CXi, C2-525x, C3-525, & C5-525x
All specifications are subject to change without notice. “JL Audio®” and the JL Audio logo, “Stealthbox” and the Stealthbox logo are registered
trademarks of JL Audio, Inc.,.“Ahead of the Curve”and its respective logo is a trademark of JL Audio, Inc.,.
JLA-SKU# 94553, 94554 03.212013 • Printed in USA • ©2011 JL Audio, Inc.,. • U.S. PATENTS: #5,734,734 #5,949,898 #6,118,884 #6,229,902
#6,243,479 #6,294,959 #6,501,844 #6,496,590 #6,441,685 #5,687,247 #6,219,431 #6,625,292 #D472,891 #D480,709 Other U.S. & Foreign
patents pending. For more detailed information please visit us online at www.jlaudio.com.
[phone]
www.jlaudio.com
10369 NORTH COMMERCE PARKWAY • MIRAMAR, FLORIDA • 33025 • USA
STEP 76
Reinstall the factory tweeter.
Repeat for the driver’s side.
Reinstall the forward dash panel and A-pillars.
STEP 75
Remove the capacitor on the factory tweeter and replace it
with the 12 ohm, 10 watt resistor / 2.2 uf capacitor assembly.
STEP 74
Remove the screw holding the factory tweeter to the
bracket.
STEP 73
Steps 73-76 are for the Base System Only.
Pictured is the 12 ohm, 10 watt resistor / 2.2 uf capacitor
assembly.
CONGRATULATIONS!
You have completed the installation for this model. Enjoy your new StealthMod® System!