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Factory Sub Replacement/Modification

Discussion in 'Audio & Video' started by rkdiddy, Oct 7, 2008.

  1. Oct 7, 2008 at 4:20 PM
    #1
    rkdiddy

    rkdiddy [OP] Senior Member

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    Well last weekend I decided it was time to upgrade my factory JBL sub. My goal was to retain the factory look while boosting the performance.

    I did a lot of searching around, but I hadn't come upon anyone that utilized the factory enclosure. So I decided I would try it. I pulled the factory box out and removed the stock sub. Interesting note - it is a dual voice coil sub. I then measured the depth of the box. After doing some research I purchased a 8" JL Audio sub.

    While I had the seats and cubbies removed, I decided to Dynamat the back wall.

    [​IMG]

    Then I applied Dynamat to the stock enclosure, sealed the old speaker screw holes and trimmed a little of the inside of the box (to allow the JL sub to fit).

    Next, I mounted the JL sub into the box and reinstalled it into the truck. After driving around for a week I was disappointed with the sound output. The factory JBL amp just didn't have enough power to run the new sub. A little discouraged, I remembered I had a Soundstream "Little Wonder" amp in storage.

    I hooked up the Little Wonder and WOW it made a HUGE difference! I was never looking for huge bass, just enough to fill out the highs and mids. This sub definitely delivers!

    Cheers! :thumbsup:

    [​IMG]
     
    Bridge4 likes this.
  2. Oct 7, 2008 at 4:22 PM
    #2
    SocalMan22

    SocalMan22 Well-Known Member

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    Looks good man! your pics are huge. Can go wrong with JL
     
  3. Oct 7, 2008 at 4:27 PM
    #3
    MyToyTaco

    MyToyTaco ╒╪╕

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    Did you get a W0?
     
  4. Oct 7, 2008 at 5:14 PM
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    rkdiddy

    rkdiddy [OP] Senior Member

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    ^ Sorry about that. I just made the pictures smaller.

    It is a JL Audio 8W1v2-4. When I purchased it I wasn't intending to run an aftermarket amp, so I went with something with a smaller mounting depth.

    I'm use to having 10" or 12" subs, so there is definitely a difference. However, I'm quite impressed on how great it sounds.

    I'm just happy my "Little Wonder" is holding strong. I've had that amp for at least 7 years.
     
  5. Oct 7, 2008 at 7:34 PM
    #5
    atsaubrey

    atsaubrey Dealer/Sales Rep for Sundown Audio.

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    Cant go wrong with the old skool SoundStream stuff. :) Wouldn't touch the new stuff though
     
  6. Oct 23, 2008 at 9:11 PM
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    TightShirts

    TightShirts The StormTrooper

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    +1 on the little wonder... great old amp
     
  7. Apr 21, 2013 at 3:31 PM
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    TRD Toy85

    TRD Toy85 Well-Known Member

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    Nice job, what are the specs on the sub?

    From the research ive done the oem jbl amp is 50 ohm rms at 2 ohm correct ?

    Im thinking of doing the same but really dont want to add a amp. I just want more clarity not looking for more bass.
     
  8. Feb 7, 2019 at 10:55 AM
    #8
    xguntherc

    xguntherc Taco Time

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    Reviving a super old thread... I had 3 comp-level Rockford Fosgate T2 subs back in high school. I don't want or need that anymore.

    However, I am thinking about adding a better sub to the back, in the stock sub box like you did. Where is the amp located? Under the driver seat?
     
  9. Feb 7, 2019 at 5:19 PM
    #9
    5nahalf

    5nahalf Well-Known Member

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    Amp is mounted to the factory sub box, you can see it in the picture, its the silver box.

    Check the ohm rating on the factory sub, might be a 2 ohm load, so you will want to get another 2 ohm sub to replace it. If you dont, then the power output will be less.
     
  10. Feb 7, 2019 at 6:24 PM
    #10
    xguntherc

    xguntherc Taco Time

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    Yeah I know about ohms and watts RMS. Used to do lots of stereo stuff.

    I'm thinking with how weak that amp is... no sub I replace it with will sound much better
     
  11. Feb 8, 2019 at 11:11 AM
    #11
    5nahalf

    5nahalf Well-Known Member

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    According to JBLs website (https://www.jbl.com/toyota.html) the system is listed a 8 channel 440 watt amplifier.... but, it drives 7 speakers. Im curious if the 8th channel can be used.

    EDIT: I am just now seeing you guys have second gen, the link I provided is for 3rd gen. Not sure if there is a difference or not in the amps.
     
    xguntherc likes this.
  12. Feb 8, 2019 at 3:17 PM
    #12
    xguntherc

    xguntherc Taco Time

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    Maybe I'll just tear it open and look.

    And technically, yes, if there are 8 channels on the AMP you can run all six speakers, then combine the remaining two channels for the sub.. and that's what I believe JBL and Toyota actually did here. @5nahalf

    After Googling around, this is what I found out about the rear sub/amp situation. (for 2nd gen & 3rd gen) both!

    Speaker Specs
    --According to Toyota documents this sub is powered by 2 channels. Each one operates at 2 ohms
    --Amp supplies a total of 110 watts (according to JBL's website) to both channels so 55 watts RMS at 2 ohms per channel

    I'm not 100% positive on this. I do know that the amp has 440w overall, and shares that 440 between 6 speakers and the sub.

    There are some decent shallow-mount 2 ohm subs from JL Audio, Rockford Fosgate, or even kicker that could be decent direct drop-in replacements. They could use more power, but will still sound significantly better than what's inside the truck today.

    Personally, I wouldn't buy any polk, sony, or pioneer subs.. nope. Instead, get one of the 3 I just mentioned.
     
    Last edited: Feb 8, 2019
    DiamondW likes this.
  13. Feb 14, 2019 at 5:30 PM
    #13
    DiamondW

    DiamondW Well-Known Member

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    Does anyone happen to know the max top mount depth of the factory jbl sub box? I am away from my truck but want to order a replacement lol.
     

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