Jeep WJ Grand Cherokee 2002 JL Audio System Showcase

By Jeep Experts

Welcome to the function of WJ Generation Jeep Grand Cherokee  2002 JL audio system. Did we miss something? Please get in contact with us and tell us!

This system improve is patterned off of the same set up by Jeep fanatic and mods skilled Chris Henry. As he famous in his write-up, the distinction between the manufacturing unit Infinity system and the JL improve is nothing in need of superb, and we couldn’t agree extra. There are tons of of combos on the market of various audio elements that can be utilized in system upgrades. The JL audio system and amps have confirmed to work collectively very effectively, even for these wanting to maintain the manufacturing unit head unit. Certainly the sky is the restrict if one desires to essentially get carried away with automobile audio, however the sound high quality, clear set up, and different benefits of this technique (or comparable) ought to enchantment to a big share of WJ homeowners on the market.

After choosing the elements, the following most necessary resolution is whether or not to self-install or have another person do it, skilled or in any other case. The finest recommendation is to contemplate this rigorously. If you will have the information and talent you could be higher off to do it your self, saving tons of of {dollars} in labor prices. More importantly, you realize that the work was completed precisely the best way you needed, and the way it was completed. If you determine to have a automobile stereo store do the work, verify them out completely and discuss to others who’ve had premium automobile audio programs put in. Inquire concerning the talent and expertise of the installers and go over each step of the set up course of. Pay at the least a portion of the invoice with a bank card. This might be crucial for leverage do you have to run into any resistance in making an attempt to get any preliminary issues or quirks with the gear or set up (if any) taken care of.

Careless and sloppy set up is one thing you don’t need. Door and trim panel elements must be eliminated and changed with care. Holes needs to be precisely and punctiliously drilled, the right dimension, and solely the place and when mandatory. It’s at all times advisable, in fact, to maintain the manufacturing unit wiring intact. Any connections to those wires needs to be soldered and insulated every time doable. Shrink tubing, wire ties and plastic wire loom are a necessity. Unsecured wiring and connectors might rattle, grow to be free, or get in the best way of issues like energy home windows

If self-installing, a Factory Service Manual might be very helpful, particularly when disassembling completely different components of your Jeep and likewise for necessary security precautions. Whether you’re putting in the system your self or not, learn the part manuals from entrance to again forward of time. In some circumstances there are completely different mounting choices in addition to different info price understanding about.

Every try has been made to insure the accuracy of the scale, specs and different info contained on these pages. It is offered right here for informational functions solely and the creator can’t be chargeable for any damages because of anybody utilizing any of the methods or procedures described herein. Proceed with warning, talent, and somewhat widespread sense and the outcomes will greater than repay.

See additionally:  Factory audio component removalandFactory radios and audio systems.

Components and specificationsComponents and specifications

1. Factory AM/FM/Cassette/CD Player

AM/FM Stereo/Cassette/CD participant
Model code RBP
CD Changer Controls
Capable of Playing CDR’s
AM: Maximum Sensitivity: 12dB (uV) S/N Ratio: 50dB
FM: S/N Ratio Mono: 55dB ST: 50dB
Five Button Preset Memory w/Set Button – 10 AM and 10 FM Station Memory
FM Ignition Noise Killer
Seek and Scan Tuning
32 Watt Bridge Audio System (8W at 5% THD, 8 ohms load – 4 Amplifiers)
Electrically Controlled Tape Deck w/Fast Forward and Rewind
Auto Reverse Cassette Including Auto Load and Music Search
Automatic Metal Tape Equalization
Dolby B Noise Reduction (cassette mode)
Forward Skip, Reverse Skip to Search for the Beginning of Each Song
Random Play on CD
Part # 56038586AG

2. Factory 10-Disc CD Changer

Rear cargo space mount
3-Beam laser monitoring (for CD-R playback)
Anti-vibration damping
Signal-to-Noise Ratio: 95dB
Channel Separation: 80dB
Frequency Response: 5 – 20,000Hz (+/-1dB)
Total Harmonic Distortion: 0.008% (at 1kHz)
Wow & Flutter: Below Measurable Limits
Dimensions: 10-3/4″ W x 7″ H x 3″ D.
Part # 56042129AG

3. JL Audio SE-40T Tweeters

2.5+” Tweeters
Recommended Amp Power: 5 – 120 Watts
Upper-dash mounted (changing manufacturing unit Infinity tweeters)
Tweeter mounting depth: 5/8″

4. JL Audio XR650-CSi part speaker system (entrance doorways)


The long-throw 6.5″ part woofer contains a mineral-filled, polypropylene cone physique with a butyl rubber encompass and a extremely optimized motor system, delivering beautiful mid bass impression and midrange high quality. The tweeter is a neodymium magnet, ferrofluid-cooled, 1-inch (25mm) aluminum dome with an artificial rubber encompass that damps undesirable ringing for clean, non-fatiguing output.

The part tweeter options JL AUDIO’s unique RSR mounting system, allowing exact alignment after set up for optimum efficiency. Competition-ready, high-end crossover networks with super-premium polypropylene capacitors, super-premium inductors, adjustable tweeter degree and solid-state tweeter safety spherical out the bundle.

2-way System:
6.5-inch (160 mm) Woofer
1-inch (25 mm) Aluminum Dome Tweeter
70W Continuous Power Handling
Recommended Amp Power: 25 – 150 Watts
89.5 dB Efficiency @ 1W/1m
Woofer mounting depth: 2.81″ (approx. 2-13/16″)
Tweeter mounting depth: 0.625″ (5/8″)
Frequency Response: 48 Hz – 25 OkayHz ą 3 dB
Nominal Impedance (tweeter): 8 ohms
Nominal Impedance (woofer): 4 ohms

5. JL Audio XR650-CX 6.5″ Coaxial audio system (rear doorways)

The long-throw woofer factor contains a mineral-filled, polypropylene cone physique with a butyl rubber encompass and a extremely optimized motor system. The tweeter is a neodymium magnet, ferrofluid-cooled 1-inch (25mm) aluminum dome with an artificial rubber encompass that damps undesirable ringing for clean, non-fatiguing output.

The tweeter is mounted at a hard and fast 15 diploma angle with a swivel function that permits it to be aimed for optimum sound high quality within the car. Outboard crossover networks with polypropylene capacitors and premium inductors function adjustable tweeter output degree and solid-state tweeter safety.

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6.5-inch (160 mm) Coaxial speaker
1-inch (25 mm) Aluminum Dome Tweeter
70W Continuous Power Handling
Rec. Amp Power: 25 – 150 Watts
89.5 dB Efficiency @ 1W/1m
Mounting Depth: 2-13/16″
Installation diameter: 5-1/2″
Frequency Response: 48 Hz – 25 OkayHz ą 3 dB
Nominal Impedance: 4 ohms

6. JL Audio Stealthbox subwoofer (rear cargo space)

Consists of 1 mannequin 10W3-D2 10″ woofer in a sealed enclosure. Exceptional tour functionality and extremely linear motor and suspension designs mix to ship most efficiency from larger energy ranges. Wired for 4 ohm mono. Installs within the driver facet rear nook of the cargo space, sacrificing little helpful cargo house. The subwoofer is protected and hid by a color-matched, carpeted metal grille.

Diameter: 10 inches (250 mm)
85.3 dB Efficiency @ 1W/1m
Continuous Power Handling: 250 Watts
Magnet Diameter: 5.9375″
Voice Coil: 2.25″ diameter, 4-layer, Kapton former
Stealthbox air quantity: .6 Cubic ft
Nominal Impedance: Dual 2 Ohm

7. JL Audio 300/4 primary amplifier

Features a cast-aluminum warmth sink with vertically-oriented fins which are extremely efficient at dissipating warmth from the amplifier through convection and radiation. The amplifier Performance chart proven above was made by by

Rated Power (stereo): 75 W RMS x 4 @ 1.5 ohm-4 ohm (11V-14.5V)
Output Power (resistive) min. output 20 Hz – 20 okHz @ 1percentTHD+N, all Channels pushed into 4 ohms: 97 watts x4 @ 14v, 90 watts x 4 @ 12.8v
Idle Current Draw: 1.6 amps
Current Draw @ 1/3 max energy: 28.8 amps @ 62.3 watts x 2
THD at Rated Power: <0.03% @ 4 ohm
S/N Ratio: >108.5 dB beneath rated energy (measured at -121.5)
Frequency Response: 5 Hz-30 OkayHz (+0, -1dB)
Voltage for Rated Output: 128mV to eight.3 volts
Distortion at Rated Output @ 1 okHz: 0.007% @ 150 watts x 2
Power-Up Noise: 0.5 dB SPL
Power-Down Noise: 0.3 dB SPL
Damping Factor: >200 @ 4 ohm per ch./50 Hz
Input Range: switchable from 200mV-2V RMS to 800mV-8V RMS
Dimensions: 13.4″L x 9.25″W x 2.36″H

8. JL Audio 250/1 subwoofer amplifier

Utilizes a brand new Class D circuit which represents a major advance in subwoofer amp design. While Class D amplifiers are well-known for excellent effectivity, they’ve additionally been recognized for lower than spectacular sound high quality because of weak damping of the pushed load. Damping issue is important to subwoofer amplifier efficiency because it supplies the mandatory drive to regulate the excessive shifting mass of subwoofers. Poor damping leads to degraded transient response (sloppy sounding bass) and irregular frequency response. JL Audio’s Patent-Pending Class D output circuit makes use of a discrete management part and a novel suggestions loop design that leads to a damping issue higher than 500 at 4 ohms (>250 at 2 ohms). This is vastly larger than different Class D designs and likewise larger than most Class AB amplifiers. The advantage of this unique JL Audio expertise is tight, clear bass replica with all of the effectivity of Class D.

Rated Power (mono):
250 W RMS @ 1.5 ohm-4 ohm (11V-14.5V)
THD at Rated Power: <0.05% @ 4 ohm
S/N Ratio: >95dB beneath rated energy
Frequency Response: 5 Hz – 500 Hz (+0, -1dB)
Damping Factor: >500 @ 4 ohm/50 Hz
Input Range: switchable from 200mV-2V RMS to 800mV-8V RMS
Dimensions: 10.25″L x 9.25″W x 2.36″H

9. DEI High-to-low converters (adjustable)


Manufactured by “DEI” (Directed Electronics, Inc.). Used for changing manufacturing unit head unit excessive degree inputs to low degree amplifier inputs. Part # 55020. See additionally Audio Upgrade.

Installation DetailsInstallation Details

(NOTE: See Component removal for info on the elimination of manufacturing unit stereo elements)

Front sprint tweeters (2.5″)

Speaker opening: 3-3/4″ x 2-3/4+”      Speaker opening depth: 1-3/4″ (see be aware beneath)














JL Audio tweeters

The 2.5″ entrance sprint Infinity sprint tweeters have been changed with the JL Audio SE-40T tweeters, which match completely into the opening. The SE-40T tweeters initially got here out in 1992 and at the moment are thought of a “price range” speaker. They can often be discovered on Ebay for beneath $40.00/pair. There are significantly better tweeters available on the market, however the SE-40T’s are first rate for the worth.

The SE-40T audio system include a plastic housing (for floor mounting), and for this venture they have been put in with their housing into the sprint. A small slot was reduce out on the highest of every finish of the housing, permitting the audio system to slip completely and tightly between the steel manufacturing unit brackets, no screws wanted. There is loads of room beneath and to the facet of the put in tweeter for the wiring, and for the small capacitor and resistor (bass/energy blocking) that’s required when the Infinity amp is upgraded. The distance between the manufacturing unit mounting holes is 3-11/32″ and the mounting depth is roughly 1-3/4″.

Capacitor/resistor wiring for SE-40T tweeter, and illustration exhibiting set up notches.
If you’re putting in the SE-40T tweeters in a system using the manufacturing unit Infinity amp, you don’t want to put in the capacitor or resistor proven within the above left picture. If the tweeters are too “brilliant” nonetheless, you’ll be able to set up the white resistor to convey them down a bit.

MB Quart tweeters


Other manufacturers of tweeters, as much as 3-inch dimension or so, can be put in into the higher sprint. MB Quart makes a wonderful line of three/4″ and 1″ premium “Reference collection” tweeters which are of excellent high quality and are very simple to mount.

The MB Quart tweeters function a threaded gap on the underside which makes mounting very simple, as proven within the picture above. A head unit mounting strap was used on this set up by Jeeps Unlimited member Mike the Apeman. The MB Quart tweeters are among the many finest available on the market. For mounting tweeters with out a threaded gap on the underside, a mounting plate might be simply made out of 1/8″ fiberboard. A gap noticed bit works finest to drill out the outlet for the tweeter.

Some homeowners have been capable of barely improve the 1-3/4″ mounting depth through the use of a warmth gun to melt the air duct which is just under the tweeter. For apparent causes, nice care have to be taken when doing this in order to not injury the duct.

Front door audio system (6.5″ & 1″)

WJ Speaker cut-out opening: 8-1/2″ x 5-3/4″      WJ Speaker opening depth (to glass): 2-7/8″
NOTE: It is completely important that speaker frames match into their mounting holes cleanly. This have to be checked previous to tightening the screws. Do not drive the body right into a gap that’s too small! Do not tighten the speaker onto an uneven floor! This will injury your audio system. The speaker must also match in order that no air leaks across the mounting flange. Air leaks will trigger a extreme degradation in sound high quality. Seal any air leaks with silicone, rope caulk or comparable sealant materials. Hand-tighten the screws evenly to keep away from bending the speaker body!

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Passenger facet door Driver facet doorTemplate dimensions Template mounting holes Front speaker opening

The manufacturing unit Infinity 6×9 speaker was eliminated and a customized backing template was made to put in each the 6.5″ and 1″ tweeter into the identical opening. Both audio system match side-by-side very properly, though with little or no room to spare. The new 1/4″ fiberboard speaker template was reduce to a dimension of 10″ x 7″. All 4 manufacturing unit holes have been used to connect the plate to the door. To mark the screw areas, I merely took the manufacturing unit Infinity speaker and turned it the wrong way up onto the template, centered it precisely after which used a pencil to mark the holes for drilling. I then briefly put in the wooden plate onto the door to confirm alignment and match. While it was connected, I reached up contained in the door and scribed a pencil line across the manufacturing unit 6×9 opening onto the again of the wooden plate. This outlined the realm that I needed to work with to suit each of the audio system into. This step just isn’t mandatory if the templates beneath are used.


Speaker gap dimensions Mounting gap dimensions 6×9 superimposed on board

The three pictures above present the scale for the mounting holes and the woofer and tweeter placement within the manufacturing unit opening. The 6×9 picture is superimposed onto the fiberboard to indicate the working space out there for the brand new audio system. Click on any of the above photos for an exact-size enlargement which may then be printed and used for a template for reducing your board. You may even cut-out the speaker holes within the printed image and overlay it onto your door to confirm precise match earlier than you begin reducing the precise board, which I might undoubtedly advocate. Printing the template onto thicker card inventory paper offers you a extra inflexible instance to work with.

Since there’s not a number of room to work with, the audio system should be mounted pretty shut collectively. Because of this, the rim of the 6.5″ woofer barely overlaps two of the manufacturing unit mounting holes. For these two holes, I used two wooden screws which I countersunk in order that they might be flush on the template, permitting the speaker to take a seat flush over them. I drilled the 4 plate mounting holes utilizing a 3/16″ bit.

With a compass, round cut-out marks for the woofer and the the tweeter have been drawn, spacing them as whilst doable into the allowable opening space. A 1-3/4″ holesaw blade was used to chop the tweeter opening, and a jigsaw used to chop the 5-1/2″ gap required for the woofer. Both boards have been calmly sanded, together with the perimeters and across the speaker mount holes, after which cleaned with a humid rag. Lastly, a pair coats of black spray paint was utilized so they might mix properly into the doorways and likewise to stop fiber mud from coming off them. The completed boards have been then connected to every door with the tweeters pre-installed, after which a skinny band of rope caulk was added across the inside perimeter of the woofer housings earlier than they went into the template. Four 1/8″ holes have been drilled to mount the woofers. Both the equipped screws and spring-clip nuts have been used, permitting the audio system to be securely fixed.

Pre-made plastic speaker templates can be found from corporations like Scosche. See Speaker templates within the Audio equipment part for extra info.

Front crossovers

Note: JL Audio recommends that their crossovers NOT be mounted within the car doorways. Doors usually get moist on the within, which may injury your crossover networks and will probably injury your complete sound system.

I made a decision I might take an opportunity, being that the WJ is garaged and the doorways are a really handy place to mount them. On the door ledge above the crossovers I duct taped a small 8″ broad sheet of clear plastic that hung over them, retaining them protected against any direct moisture. If you determine to put in your crossovers within the doorways, proceed at your personal danger!

The part system crossovers have been mounted inside the underside of every door and connected with industrial energy Velcro. The complete backs of the crossover housings have been coated with Velcro, utilizing two strips every a pair inches broad. I cleaned the realm of the door the place they have been to be mounted with rubbing alcohol after which very calmly sanded the identical space in order that theVelcro backing would stick firmly. Wiring was secured to the again of the window information to maintain it out of the trail of the window. All different speaker wiring was connected the place essential to preserve it out of the trail of the home windows and to stop any rattling.

Rear door audio system (6.5″)

WJ Speaker cut-out opening: 5-3/4″ diameter WJ Speaker opening depth (to glass): 2-7/8″

The new rear door audio system match properly into the 5-3/4″ diameter manufacturing unit openings, with about 1/8″ of play throughout. The mounting depth of the speaker was such that the again of the speaker got here very near the window glass. A 1/8″ fiber board spacer ring was reduce and put in across the speaker opening to convey it out one other 1/8″. The spacer was affixed on to the door steel with a bead of rope caulk round it for cushioning. The waterdam cowl was positioned over the spacer after which the speaker was positioned within the opening and centered. Centering is necessary as there’s not a number of additional room on the edges to succeed in the door steel. The waterdam materials needed to be reduce somewhat to permit the thicker speaker to suit correctly. Four 1/8″ holes have been drilled to mount the audio system. Both the equipped screws and spring-clip nuts have been used, permitting the audio system to be securely fixed.

Pre-made plastic speaker templates can be found from corporations like Scosche. See Speaker templates within the Audio equipment part for extra info.

Rear crossovers

As within the entrance, the crossovers have been mounted inside every door and connected with industrial energy Velcro. See be aware above beneath Front Crossovers per the warning about putting in crossovers in doorways.


The Infinity amp and bracket meeting have been eliminated, in addition to the jack instruments positioned beneath the rear passenger seat. The two JL amps have been then mounted beneath the rear seats. The 250/1 subwoofer amp was put in on the passenger facet, and the 300/4 amp on the drivers facet. In order to suit the amps on this location, the steel rear crossmember needed to be notched out on all sides. This allowed the amps to be recessed about 2-1/2″ into the beam. The manufacturing unit carpet neatly match into and across the new opening. Each amp was connected to the thick carpet with simply two brief screws, one in every higher nook (they’ll really keep properly in place with none screws).

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All of the wiring to and between the amps was run by way of the crossbeam. The fused 4 gauge wire feed from the battery was run to a fused junction block positioned between the amps. The block then fed an influence line to each amplifiers. There is room for the amps to “breath” by the use of the hole between the underside of the seats and the highest of the crossmember. There are additionally different openings across the seats the place scorching air can escape.

Shown listed below are views of the crossbeam opening cutouts. The prime picture exhibits the drivers facet (trying ahead) the place the 300/4 was put in. The installers implied that this was going to be reduce cleanly, however as you’ll be able to see they reduce the highest fairly crooked. If I had recognized this I might have completed it myself. I added wireloom across the openings of the cutout space and secured it each 6 inches or so with scorching glue, as seen within the second picture (passenger facet, trying ahead). This labored properly to cowl the tough edges of the opening and likewise allowed the underside of the amps a smoother space to “relaxation” on than naked steel. In order to retain the unique energy of the crossbeam, I plan on including a bit of 1/4″ sheet steel on all sides, customized reduce to slot in entrance of your entire opening, with an oblong space reduce out for the amps to slip into. They will then be bolted to the crossmember

Stealthbox subwoofer

Cargo web elimination Mounting bolt 99-’01 Stealthbox ’02 Stealthbox


The Stealthbox 10″ subwoofer matches properly and takes up little or no cargo room. It is put in with with only one bolt, drilled into the wheel effectively. This is a vital and worthwhile addition to the sound system. Chris Henry was proper when he stated “…the sealed enclosure holding the 10W3 pounded out bass notes with tightness and authority…and might deal with something you throw at it.” It will certainly vibrate your entire car in that case desired (and the folks inside), however even at affordable listening ranges the impression and readability is beautiful.

The Stealthbox has lately undergone a slight modification to ensure that it to suit correctly in 2002 fashions. For some unknown purpose, Jeep moved the recess mounting slot for the cargo shade 1-1/4″ additional in direction of the rear. The earlier mannequin Stealthboxes coated over this space on the 2002 WJ’s stopping the mounting of the cargo shade. All Stealthboxes manufactured after June 1, 2002 at the moment are recessed again additional alongside the highest proper facet to permit room for the cargo shade. The half quantity stays the identical (although I recommended in any other case to keep away from confusion) and the brand new mannequin will now match all WJ’s from 1999-2002. If you will have a 2002 or later WJ, make it possible for the seller is ordering manufacturing unit direct somewhat than from some distributor who should still have the sooner variations in inventory, and that your mannequin 12 months is specified on the order kind.

I discovered the equipped 3/8″ x 1-1/2″ bolt a lot too brief to mount the subwoofer to the wheelwell (this has now been addressed with a brand new bolt design). The instructions let you know to drill the outlet within the wheelwell, place the subwoofer into place, after which feed the bolt up by way of the fender. After a failed effort of making an attempt to line up the bolt to the subwoofer, I gave up and went to the ironmongery shop and acquired an extended 2-1/2″ bolt. I additionally picked up a rubber 3/8″ grommet to position within the new fenderwell gap. The longer bolt was nonetheless somewhat tough to line up, as simply being off barely allowed the bolt to simply crossthread. I lastly ended up reducing off the top of the bolt. I threaded it just a few turns into the subwoofer enclosure, after which positioned the subwoofer on the fenderwell to align the bolt by way of the grommet and gap. Once in place, from beneath I put two nuts on the finish of the bolt in order that I may thread it deeper into the subwoofer. Once that was completed, I eliminated the 2 nuts, added some sealant across the gap, added the washer, and bolted one nut and lockwasher again on to tighten it up.

NOTE: 2001 and later mannequin WJ’s have a web connected to the facet pocket storage recess, proper the place the subwoofer mounts. The web meeting has a plastic oval body molding that when in place protrudes out from the facet trim piece. For a greater subwoofer match, this storage web might be eliminated, however it’s essential to take away your entire facet trim piece to get to the again to take away it. That entails eradicating the rear headliner trim cowl, one screw within the left rearward cargo ground molding, the rear higher left nook trim piece, and the principle left facet rear trim piece. In order to take away the principle trim piece, it’s essential to first take away the 2 black steel cargo hooks. The cargo web is put in with plastic rivets which have to be drilled out with the intention to free the online body. I used a 3/8″ drill bit and drilled simply barely deep sufficient to free the rivets and take away the body meeting.

For instructions on eradicating the rear trim, see Cargo space left trim piece elimination



Power wiring to battery JL system wiring


Click Here for a printer pleasant model of the principle diagram proven above left.

The set up of this technique was simplified through the use of the unique manufacturing unit speaker wiring. It was was simple though considerably time-consuming to splice the 22 wanted wires into the 2 manufacturing unit Infinity amp harnesses. The harnesses have been in an ideal location for the reason that new amps have been going into the identical space beneath the seats. The wires might be spliced only a few inches again fro m every of the connectors that have been unhooked from the Infinity amp. The prime picture at left exhibits an in depth diagram for the speaker and amplifier wiring.

The higher proper picture exhibits the facility, floor and amplifier management wires. The two primary energy wires from the amps are linked to a fused breakout field between the amplifiers, and from there a 4-gauge energy line was run alongside the left baseboard, by way of the higher firewall through the present grommet, and to the battery. The energy line was fused once more on the battery for added safety.

Infinity amp wiring harness splice element
Additional WJ audio system diagrams: Wiring diagrams

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