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Old 01-03-2021, 07:29 PM #1
J.Derrick86 J.Derrick86 is offline
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4th Gen 4Runner Subwoofer and Stereo

2003 Toyota 4Runner Limited V8

For all intents and purposes, this is meant to be a compiled version of what is out there in so many places. This will also be (to some extent) a re-hash of a problem that has already been gone over in all of those places.

I have a 2003 4Runner Limited with the factory JBL stereo system (NOT impressed...). From what is gathered from my readings as well as owning the vehicle, the JBL system is terrible. Hopefully, others that have this system have found the opposite. I did not. The Head Unit (HU) had both tape CD capabilities which were both not functional and out of the 10 speakers in the system, 3 were not blown or deteriorated beyond function.

Stereo system going in:
  • Alpine ILX-W650 (Head Unit)
  • Alpine KTA-450 (Speaker Amp)
  • JL Audio C1-690 (Front Component Speakers)
  • JL Audio C1-650x (Rear Coaxial Speakers)
  • Rockford Fosgate P3SD2-8 (8" Subwoofer - 2Ohm)
  • Rockford Fosgate R2-250X1 (Subwoofer Amp)



List of accessory components:
  • Rockford Fosgate RFK8-i (Subwoofer Amp wiring kit)
  • RadioPRO ADVANCED TY1A-RS (Steering Wheel Controls Adapter Kit)
  • PAC BKTOYK961 (HU Mounting Adapter kit and Bezel)
  • Metra 70-8117 (Wire harness to tap into factory output of the factory amp to speakers)
  • Metra 82-8146 (Front 6x9 Speakers, door adapter mounts)
  • Metra 82-8148 (Rear 6.5x6.5 Speakers, door adapter mounts)
  • Stinger RKFR69 (Foam kit for front speakers)
  • Stinger RKFR6 (Foam kit for rear speakers)
  • Stinger X Damping Material (Inside door and around speaker mounts)



Now comes the fun part! Here are the pictures that were part of the build. I didn't take as many as I would have liked to. Once I get going on something, I can lose track of some of the other items I meant to do. In this case, it was more pictures!

This is the beginning of tearing everything down:



Condition of the factory Subwoofer:



Everything in the back torn out, back passenger door panel, and front panel:



Only just the beginnings of the interior trim pieces coming out:



Shot of a JL Audio front tweeter mounted in its custom 1/4" MDF adapter:



Before shot of the driver's front door with factory components in:



After shot of the driver's door with JL Audio components installed:[url=https://flic.kr/p/2koGN5v]


Unfortunately, I did not get shot with the speaker out, damping mat in, and foam kit installed. I did need to do some trimming of the interior foam piece that went in the door to fit around a cross member and so the windows wouldn't hit anything on the way down. Did this on all doors.

Close-up shots on the front 6x9's and tweeters (needed to be mounted on the backside of the factory brackets to clear the door panel):




Next few are of the center console panels removed and ready to take out the old HU:





Because I was doing more to this than just an upgrade on the HU, I opted to remove everything out of the center of the vehicle so I had options of where I could run my wire for the subwoofer amp. I had originally planned on placing it in the spot where the factory amp was but it didn't fit. Instead, I mounted it under the passenger front seat.

HU came with a USB port and the subwoofer amp has a remote level controller, I mounted them in the "hidden" glove compartment:



HU removed and steering wheel control adapter placed (I had to take this back out and "update" the harness that it came with so everything would turn on and function properly):



I ran my RCA, Amp remote, and Amp remote level cable where the yellow cable sheathing comes down the center console:




Continuing this on another post because of too many pictures...
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Old 01-03-2021, 07:36 PM #2
J.Derrick86 J.Derrick86 is offline
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4th Gen 4Runner Subwoofer and Stereo

2003 Toyota 4Runner Limited V8 - Continued

Images of where I ran my subwoofer amp positive line from the battery (no capacitor in this system. At least yet...):





I removed the factory grommet from the sub box, removed the stubborn old wires out, placed it back in the box, and ran my new speaker wire through:



Shows where my speaker wires and the positive line ran to the subwoofer amp:



Subwoofer amp mounted and wired up:



Fancy adapter plate I made to be able to mount to the factory box screw holes and line up with the sub screw holes. I used some #10 1-1/4" flat head wood screws to attach the plate to the box (thread pattern matched the closest with the factory screws) and some 1/2" - 5/8" 10-32 pan head screws to mount the sub in place:




Filled the box with some synthetic fiber batting to get the volume of the box closer to the .25cuft ideal the subwoofer likes:



Shot of the subwoofer and interior panels mounted:




This subwoofer fit great into the factory box with the adapter plate and behind the factory panels. It did not sit deep enough in the box to add the speaker grill or fancy bezel plate... Oh well, hopefully no one sticks anything through the factory panel!

HU installed and paneling back in:



I did not keep the center tweeter in the dashboard and removed the bracket to help with giving a little bit more room for wires.

The system sounds great! The sub bumps pretty well for only being an 8" and (thankfully) I don't hear any panels rattling around when music is playing. If I am outside of the car while something is turned up, there are a few things that do, but nothing that I can hear inside.

Hopefully, this will help someone in the future with a system build of their own. I didn't have any issues with windows hitting speakers or door panels hitting speakers. The only hiccup was making sure I got the wiring correct between all the different components that were put in. Unfortunately, this is the part I wish I would have gotten pictures of!

Hope this helps, cheers!
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Old 01-03-2021, 07:56 PM #3
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Thanks for a great pic-rich write-up of the process. Before and after, with parts used and everything exposed, really helps. Have Infinity Kappa 6x9s to install in my front doors, after they worked so well in my F-150. But you make me want to check my subwoofer. Sheesh, that was shot!
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Old 01-03-2021, 11:48 PM #4
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Great write up and pics - I have the same '03 Limited w/JBL and added the Alpine HU last summer, intending to add the rest this winter - perfect timing.
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Old 01-04-2021, 12:15 AM #5
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Quote:
Originally Posted by Wild Thing View Post
Sheesh, that was shot!
No joke... I thought it would be attached somewhere but the rubber surround was split all the way around!
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Old 01-04-2021, 12:40 AM #6
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Nice install. I installed mine in the same area.
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Old 01-04-2021, 05:30 PM #7
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Awesome post! Quick question about your subwoofer. A month ago I replaced the factory JBL sub with the same rockford sub that you posted. When volume on the stock headunit is around 40, it makes a knocking sound (almost like 2 wood blocks clanking together) when the beat hits. I contacted crutchfield and they had no answers for me as to why this is happening. I am wondering, have you experienced a similar sound with your install?

Also, I replaced only the subwoofer nothing else. Before purchasing, crutchfield recommended it as a direct replacement to the factory subwoofer. Stock headunit and amp all remain.
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Old 01-04-2021, 06:25 PM #8
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Quote:
Originally Posted by PatronT4R View Post
Awesome post! Quick question about your subwoofer. A month ago I replaced the factory JBL sub with the same rockford sub that you posted. When volume on the stock headunit is around 40, it makes a knocking sound (almost like 2 wood blocks clanking together) when the beat hits. I contacted crutchfield and they had no answers for me as to why this is happening. I am wondering, have you experienced a similar sound with your install?
Thanks! The system does what I want for sure.

How did you mount the sub in? Is it tight in the box, no air gaps? I made my adapter plate so it would seat really well with the factory mounting holes in the box and stay tight. I added some weather stripping in between layers to help with air tightness. I could only hazard guesses as to why your setup sounds the way it does.

Quote:
Originally Posted by PatronT4R View Post
Also, I replaced only the subwoofer nothing else. Before purchasing, crutchfield recommended it as a direct replacement to the factory subwoofer. Stock headunit and amp all remain.
Did you wire the sub up to work on the 2 Ohm impedance the factory system is setup for? I know if I turn the gain up too high on the amp and crank the RLC for the amp, it will overdrive the sub and cause some major distortion. I don't know what the factory system is driving either, wattage wise.
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Old 01-05-2021, 02:16 PM #9
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Just curious if just replacing the factory JBL sub would be an upgrade?
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Old 01-05-2021, 02:30 PM #10
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Quote:
Originally Posted by 702tripgen View Post
Just curious if just replacing the factory JBL sub would be an upgrade?

Replacing just the JBL makes a night and day difference. Even in the factory amp. Just look at the difference in quality (granted mind was blown). I ended up changing all my speakers shortly after.




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Old 01-05-2021, 03:35 PM #11
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Quote:
Originally Posted by Tironeous View Post
Replacing just the JBL makes a night and day difference. Even in the factory amp. Just look at the difference in quality (granted mind was blown). I ended up changing all my speakers shortly after.




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NICE! Do you remember the model number for that sub?
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Old 01-05-2021, 04:27 PM #12
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Originally Posted by 702tripgen View Post
NICE! Do you remember the model number for that sub?

Pioneer TS-SW2002D2

There’s a newer model that handles more power. I don’t plan on replacing the factory amp though so this one was fine for me.


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Old 01-06-2021, 12:22 PM #13
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Quote:
Originally Posted by J.Derrick86 View Post
Thanks! The system does what I want for sure.

How did you mount the sub in? Is it tight in the box, no air gaps? I made my adapter plate so it would seat really well with the factory mounting holes in the box and stay tight. I added some weather stripping in between layers to help with air tightness. I could only hazard guesses as to why your setup sounds the way it does.



Did you wire the sub up to work on the 2 Ohm impedance the factory system is setup for? I know if I turn the gain up too high on the amp and crank the RLC for the amp, it will overdrive the sub and cause some major distortion. I don't know what the factory system is driving either, wattage wise.
Yes the mounting is tight with no air leaks. Do you have any pictures of how you wired it? The way I wired it was exactly the same as the factory speaker I replaced.
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Old 01-08-2021, 01:15 PM #14
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Quote:
Originally Posted by PatronT4R View Post
Yes the mounting is tight with no air leaks. Do you have any pictures of how you wired it? The way I wired it was exactly the same as the factory speaker I replaced.
I would fact check this: the factory system should be wired for working with a 2ohm load from the factory sub/amp combo. It seems to me that it may be wired up with two separate channels going to the sub, each with a 2ohm impedance... I don't know what the factory circuit for the factory sub looks like because I didn't use the factory amp...

Here is picture of how mine is wired up. I bought the 2ohm DVC version of this sub so that I would be able to wire it for a 4ohm load so the I wouldn't be overdriving the sub from the amp with to much output (250w RMS vs 150w RMS):

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Old 03-05-2021, 05:33 PM #15
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nice write up and install. I put the ILX-W650 in my 05 a few months back and have been pretty pleased with it besides android auto acting up sometimes. It was considering getting the kta 450 when I upgrade my speakers. Does it power yours pretty well? thanks for the install pics, hope to get mine going soon as I have some blown door speakers as well.
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