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Alpine Ktp445u amp

Discussion in 'New Member Introductions' started by Caritaman1, Feb 2, 2021.

  1. Feb 2, 2021 at 11:59 AM
    #1
    Caritaman1

    Caritaman1 [OP] New Member

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    Hello everybody, I am new to the forum. I’m just excited for I just added the Alpine ktp 445u to my stock head unit. And I gotta say it made the focal plug and play speakers sound amazing. Don’t even need sub. Just had to share. My Tundra is a 2012 Crewmax .
     
    The Black Mamba and YardBird like this.
  2. Feb 2, 2021 at 12:52 PM
    #2
    TheBeast

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  3. Feb 2, 2021 at 12:53 PM
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    jalam321

    jalam321 New Member

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    Welcome! Did yours have the factory JBL system?
     
  4. Feb 2, 2021 at 1:27 PM
    #4
    Caritaman1

    Caritaman1 [OP] New Member

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    Non jbl.
     
  5. Feb 2, 2021 at 5:41 PM
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    YardBird

    YardBird Native San Diegan

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  6. Feb 2, 2021 at 7:03 PM
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    BMET

    BMET New Member

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    Nice. I need more volume out of my unit.
     
  7. Feb 5, 2021 at 8:54 AM
    #7
    RainMan_PNW

    RainMan_PNW SSEM #82 RGBA #4 “That Guy” Vendor?

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  8. Sep 5, 2023 at 11:27 AM
    #8
    mestes1999

    mestes1999 New Member

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    I realize that this is an old post, but looking to replace the factory, non-JBL underseat amp with the KTP-445U. Found these wiring harnesses which are made for this amp on Amazon, do I just cut off the factory harness and resplice it to this harness or how does it work? Amazon.com: 2010-2019 Toyota Tundra (w/o JBL Audio) AutoHarnessHouse.com Factory Amp Upgrade Harness AHH-4438 : Electronics

    61CA53usnAL._AC_SX679_.jpg
     
  9. Sep 5, 2023 at 12:17 PM
    #9
    Caritaman1

    Caritaman1 [OP] New Member

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    No need for slicing. Just connect right wires from harness to amp. Then it’s plug to factory harness.
     
  10. Sep 5, 2023 at 12:18 PM
    #10
    mestes1999

    mestes1999 New Member

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    Excellent, thanks
     
  11. Sep 5, 2023 at 12:24 PM
    #11
    Caritaman1

    Caritaman1 [OP] New Member

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    I just hope you’re not like me and never satisfied. Since then I upgraded with Audison af m 12.14 bit, all Audison components, mid range, Audison coaxial and Jl audio powered sub. Now satisfied
     
  12. Sep 5, 2023 at 12:26 PM
    #12
    mestes1999

    mestes1999 New Member

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    Well, my current plan is to replace the head unit with an Alpine Halo 11, replace the factory amp, then the factory speakers at some point.
     
  13. Sep 5, 2023 at 12:33 PM
    #13
    Caritaman1

    Caritaman1 [OP] New Member

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    Alpine sounds great, but didn’t know you had factory amp. Wiring could be tricky. My truck was non jbl and no factory amp.
     
  14. Sep 5, 2023 at 12:38 PM
    #14
    mestes1999

    mestes1999 New Member

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    Yes I have the non-JBL factory system which has an amp under the seat. The harness I sent the link for is supposedly to attach the KTP-445U directly to the factory wiring so you can just directly replace that factory amp.
     
  15. Jan 1, 2024 at 1:09 PM
    #15
    meagain

    meagain New Member

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    Any reports on satisfaction or otherwise with the Alpine replacement amp? I may grab one today
     
  16. Jan 2, 2024 at 1:58 PM
    #16
    Bakershack

    Bakershack Critical of Noncritical Thinkers

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    Another revival of an old intro thread!
     
  17. Feb 4, 2024 at 11:56 AM
    #17
    mestes1999

    mestes1999 New Member

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    Okay, so I got the wiring harnesses in which connect directly to the factory harnesses under the passenger seat for the non-JBL amp. I also got the Alpine KTP-445U amp. I'm a super newb at car audio, I know I will need to crimp wires together, but where do the RCA jacks go? I have other pics if needed.

    IMG_3994.jpg
     
  18. Feb 4, 2024 at 2:44 PM
    #18
    1lowlife

    1lowlife Toxic prick and pavement princess..

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    You won't use the RCA jacks.
    You are using speaker-level inputs..:thumbsup:


    500KTP445U (crutchfieldonline.com)

    upload_2024-2-4_16-43-49.png

    Make sure you put the switch on speaker input.

    Screenshot_2024-02-04_164555_c2d703107ac06181136a3b18696a4fa2e0d52f25.png

    Your amp and speaker wire colors.
    That is the amp at the bottom of the page.
    It should have every wire you need unless you run a power line from the battery instead of using the factory amp power...

    Screenshot_2024-02-04_165024_90fa801d5b5524602449a022377e2a5c5bb8a0c1.pngScreenshot_2024-02-04_165044_39ed9faa7b1abfabe9eab1ccfae0706aad29943a.pngScreenshot_2024-02-04_165100_a3d7b7180bba5e5d7676e478905f0efcc12b4b9f.png

    Remember your dash speakers are powered from the HU, they don't go thru the amp.
     
    Last edited: Feb 4, 2024
  19. Feb 4, 2024 at 4:08 PM
    #19
    mestes1999

    mestes1999 New Member

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    Wow, thank you so much.
     
    1lowlife likes this.
  20. Feb 5, 2024 at 6:27 AM
    #20
    mestes1999

    mestes1999 New Member

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    Where did you get the color diagrams? I need to find the larger version that are a little clearer.
     
  21. Feb 5, 2024 at 7:09 AM
    #21
    1lowlife

    1lowlife Toxic prick and pavement princess..

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    Last edited: Feb 5, 2024
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