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Upgrading JBL system?? Has anyone done it?

Discussion in 'Audio & Video' started by Jrunr, Nov 1, 2021.

  1. Nov 1, 2021 at 12:25 AM
    #1
    Jrunr

    Jrunr [OP] 2021 TRD Pro

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    How hard is it to upgrade the factory JBL system in the Limited and TRD Pro 4Runners? While there is a TON of information on upgrading the "NON" JBL systems, I haven't found much information on upgrading these in the Limited and TRD Pro vehicles.

    Who has done it, and how did it turn out? What harnesses do we need to use for the the speakers? Has anyone successfully upgraded the factory JBL subwoofer?

    Thanks in advance!
     
  2. Nov 1, 2021 at 6:23 AM
    #2
    dolbytone

    dolbytone New Member

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  3. Nov 4, 2021 at 9:53 AM
    #3
    Jrunr

    Jrunr [OP] 2021 TRD Pro

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    I don’t want to pull the radio. I want to keep that but increase the sound quality of the speakers and sub.
     
  4. Apr 24, 2022 at 7:25 AM
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    matoolie

    matoolie New Member

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    Did you make any upgrades? I am brainstorming options for my ‘21 Pro.
     
  5. Apr 24, 2022 at 11:33 AM
    #5
    Jrunr

    Jrunr [OP] 2021 TRD Pro

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    Not yet. I’m still deployed but should be Home this summer. Hopefully I can start then.
     
    matoolie likes this.
  6. May 10, 2022 at 1:26 AM
    #6
    Jrunr

    Jrunr [OP] 2021 TRD Pro

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  7. May 10, 2022 at 4:21 PM
    #7
    skylinekin

    skylinekin New Member

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    Look into OEM audio plus, they have a JBL enhancement kit compatible with the JBL system and original head unit.
     
  8. May 11, 2022 at 3:32 AM
    #8
    dolbytone

    dolbytone New Member

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    I don’t have first hand experience with the AmpPRO or the JBL system.
     
  9. May 11, 2022 at 5:25 AM
    #9
    Jrunr

    Jrunr [OP] 2021 TRD Pro

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    Well, I’m thinking of just using the wires that plug into the subwoofer with an LC2i to add an additional sub amp, and replace the stock subwoofer with a JL Audio 8W3. Keeps everything looking stock, but adds MUCH more low end boost.

    Does anyone see any problems or issues with this approach?
     
  10. May 14, 2022 at 2:53 AM
    #10
    Jrunr

    Jrunr [OP] 2021 TRD Pro

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    Also, I am going to have to start with the dash speakers. So I really need to figure out which wires go to what... I really cant believe that there is ZERO aftermarket support for the JBL systems in our vehicles. down to the smallest speaker wire harnesses... Its crazy!
     
  11. May 14, 2022 at 6:11 AM
    #11
    Kyblack76

    Kyblack76 New Member

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    Oem sources, will cut volume/db/low end at will, especially at volume(reason most change or process them out), so, you could put Focal Utopia drivers in there, but still only have so much bandwidth. They do it so you dont blow the oem turds.
    Finding pos and neg, wont be hard, as they are on the driver, and youll most likely get a harness, both for the oem source and drivers you select. Ill give Crutchfield that. Basically plug and play. A maestro unit maybe needed, but I'm not sure. I changed my head unit and used a maestro, swaped drivers, added dampening, amplification, and processing anyway, because i want all the control, new drivers in stock locations, and added subs.
    Sticking with the oem source will have its own battles, but, there a really great units to battle that. (Dsp's) Then you can see a full 20-20k band, and tweek accordingly. But its more $ and way more work.
    If your just adding subs, be selective on the line output converter, as 99.99% only add noise/distortion, and make sure you tap into a channel with the right output/band width. (The dash channels lets say, wont give you that, because of mention above)
    Cheers and good luck. Its all been done already, even on the new models, but finding helpful/good/truthful info may take some searching and time.
    (I am a huge, huge music/audio fan, and its a must for me, and in my vehicle, so i get it)
     
  12. May 14, 2022 at 6:43 AM
    #12
    Jrunr

    Jrunr [OP] 2021 TRD Pro

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    Thanks for that response. I am keeping my factory head unit. The speakers should be a plug and play upgrade… so I hope that’s fine.

    My only real concern is the JL 8W3 sub woofer I’ll be putting in the OEM box. I plan on just tapping the lines that go into the sub at the box, using an LC2i or equivalent, and a suitable mono block amplifier… I really hope it works out without any major issues.
     
  13. May 14, 2022 at 8:21 AM
    #13
    Kyblack76

    Kyblack76 New Member

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    Yep, so just a subwoofer.
    So, more or less the low end. Got ya. I dont know the jbl "upgrade" signal bandwidth from the oem source. But AudioControl makes decent gear, and it may even help restore lost frequencies from the oem source if there is any. How thar driver behaves in the oem enclosure, i dont know. Good luck either way mate.
    What amplifier are you going to use? Just oem? Or ?
     
  14. May 14, 2022 at 12:30 PM
    #14
    dolbytone

    dolbytone New Member

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    Not sure, seems like the JBL sub might be DVC with two sets of wires going to it. If that’s the case I’d skip any kind of LOC and go with an amplifier that accepts high level inputs in the voltage range that you need.
     
  15. May 14, 2022 at 12:51 PM
    #15
    Jrunr

    Jrunr [OP] 2021 TRD Pro

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    I am looking at using this mono amp from AudioControl: https://www.crutchfield.com/p_161ACM1300/AudioControl-ACM-1-300.html
     
  16. May 14, 2022 at 5:35 PM
    #16
    dolbytone

    dolbytone New Member

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    I’m not sure that 300W @2 ohms is much different than what the OEM sub amp supplies.
     
  17. May 14, 2022 at 11:07 PM
    #17
    Jrunr

    Jrunr [OP] 2021 TRD Pro

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    min pretty sure the OEM sub amp isn’t putting out much more than 20 actual watts. Lol
     
  18. May 15, 2022 at 3:53 AM
    #18
    dolbytone

    dolbytone New Member

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    The page at JBL lists the system at 550W. 20W isn’t plausible.
     
  19. May 15, 2022 at 6:35 AM
    #19
    Jrunr

    Jrunr [OP] 2021 TRD Pro

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    That would be a maximum possible rating, which isn’t probable. Considering the front doors and dash speakers are on the same channel, and the rear doors and lift gate speakers are on the same channel, And given the output of the current subwoofer is pretty minimal… I would speculate that the specs of the 525W system is completely overrated/inflated.
     

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