Install as shown in the diagram here. Use the 
supplied mounting clips unless the factory holes 
already feature threaded inserts. Hand-tighten the 
screws evenly to avoid bending the speaker frame!
INSTALLING YOUR TR400-CXi 
COAXIALS IN CUSTOM LOCATIONS:
Run speaker wire to the desired mounting 
location. If you are running wires into a door, use 
existing factory wiring boots whenever possible. If 
you are drilling new holes,file their edges and install 
rubber grommets into each hole. Then, cover the 
wires with a protective PVC sleeve and run them 
through the door jamb. Make sure that the wires 
will clear door hinges and other structures in the 
door. If you are unsure about any part of this 
process, please contact your JL AUDIO dealer for 
installation help.
Double check the clearance for both speakers 
before proceeding.
Use the supplied template to mark the desired 
mounting location. Mark the center and the outline 
of the mounting hole as well as the mounting screw 
positions. Before drilling or cutting, use a utility knife 
to cut any fabric, vinyl or leather from hole 
locations. These materials can easily be snagged by 
a drill or a saw, causing damage to the panel and 
possible bodily injury.
Drill four 1/8” (3 mm) holes for the speaker’s 
mounting screws at the positions you have marked. 
Also drill a pilot hole in the center of the speaker 
mounting hole at this time. Then, using a saber saw, 
hole saw or nibbler, make the circular cut out for 
the speaker. File any rough edges.
Insert the mounting clips with the flat side 
towards the speaker as shown in the diagram.
It is absolutely vital that the speaker frame fits 
into the mounting hole cleanly. This must be 
checked prior to tightening the screws. Do not 
force the frame into a hole that is too small! Do 
not tighten the speaker onto an uneven surface! This 
will damage your speakers. The speaker should also 
fit so that no air leaks around the mounting flange. 
Air leaks will cause a severe degradation in sound 
quality. Seal any air leaks with silicone, rope caulk or 
similar sealant material.
Connect the speaker wires, observing 
correct polarity, and install the speaker and 
grille tray as shown in the diagram at the 
bottom of this page.
Hand-tighten the screws evenly to avoid 
bending the speaker frame!
Break off small pieces of the supplied butyl 
adhesive putty and place them on the inside of each 
grille tray. This adhesive will hold the grille in place 
firmly and prevent rattling. Then inser t the metal 
grille into the grille tray, squeezing gently around its 
edge until it seats firmly into the tray.
JL AUDIO TR400-CXi 3
TR400-CXi SPECIFICATIONS:
Woofers: Injection-molded, mica-filled, 
polypropylene cone body, 1-inch (25mm) voice 
coil, flat-profile/ symmetrical-roll spider, butyl 
rubber surround. Flexible mounting system with 
detachable mounting tabs.
Tweeters:0.5-inch (12 mm) textile dome tweeter 
with integral phase plug, neodymium magnet, 
ferrofluid cooled and damped.
Continuous Power Handling:
35 Watts (RMS Method)
Frequency Response: 71Hz - 22 KHz (± 3 dB) 
Efficiency @ 1W/1m: 84.5 dB 
Nominal Impedance: 4 ohms
Included Components and Parts:
• Two TR400-CXi 4-inch (100 mm) 
Coaxial loudspeakers
• Two Metal Grilles and Grille Trays
• Butyl adhesive putty for grilles
• Eight #8 x 1 1/4 inch (30 mm) 
sheet metal screws
• Eight Mounting Clips
• Included Adaptors: 4 x 6-inch (100 x 150 mm)
• Two 5.2 mm female crimpable connectors
• Two 2.8 mm female crimpable connectors
• Four #8 x 0.315 inch (8 mm) 
sheet metal screws
GETTING STARTED:
• Turn off the audio system. It is also advisable to 
disconnect the negative (-) terminal of your 
vehicle’s battery whenever performing 
installation work.
• Before cutting, drilling or inserting any screw, 
check clearances on both sides of the planned 
mounting surface. Also check for any potential 
obstacles, such as window tracks and motors, 
wiring harnesses, etc. Check both sides of the car, 
many cars are not symmetrical!
• Always wear protective eyewear.
INSTALLING YOUR TR400-CXi 
COAXIALS IN FACTORY LOCATIONS:
If you will be using the factory speaker wires, it 
may be necessary to change the terminations. This 
may be accomplished by using an adaptor plug or 
simply by cutting the factory connector off and 
using the supplied crimp connectors to terminate 
the speaker wires.The large connector is for the 
positive terminal and the small connector is for the 
negative terminal of each TR400-CXi. You may also 
choose to run new speaker wires...refer to the 
custom installation section for details. Whichever 
method you choose, observe correct polarity in 
your connections. If you are unsure about any of 
these issues, contact your JL AUDIO dealer for 
installation assistance.
Your new speakers have been designed to install, 
without modifications, into most vehicles that accept 
a 4-inch (100 mm) or 4 x 6-inch oval speaker 
(adaptor plates are supplied for the latter). Most 
factory 4-inch speakers use four mounting screws 
which will line up with the mounting holes on your 
TR400-CXi speakers. In some vehicles, only two 
mounting holes are used and there is insufficient 
clearance for the two extra mounting tabs. If this is 
the case, bend the redundant tabs back and forth 
until they break off (all four tabs on the TR400-CXi 
are perforated for this purpose). After breaking off 
the unwanted tabs, please handle the speaker 
carefully, as the broken edges may be sharp.
It is absolutely vital that the speaker frame fits 
into the mounting hole cleanly. This must be 
checked prior to tightening the screws. Do not 
force the frame into a hole that is too small! Do 
not tighten the speaker onto an uneven surface! This 
will damage your speakers. The speaker should also 
fit so that no air leaks around the mounting flange. 
Air leaks will cause a severe degradation in sound 
quality. Seal any air leaks with silicone, rope caulk or 
similar sealant material.
2 JL AUDIO TR400-CXi
4-hole mount 2-hole mount