Amplifier Install - Recommended Wire Paths?

Discussion in 'Gen 2 Prius Audio and Electronics' started by Priapet, Jan 2, 2026.

  1. Priapet

    Priapet New Member

    Joined:
    Sep 23, 2025
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    Location:
    In my Prius
    Vehicle:
    2008 Prius
    Model:
    LE
    I’m replacing the JBL Amp with a larger class A/B amp under the passenger seat (an old MTX Thunder 4x40) to power all door speakers.

    I might do a full re-wire. Never added an amp to a car with a large battery bank before. Any spots I should avoid that cause a lot of signal interference?

    Amp 1
    - power will run from rear battery along pax side to amp, grounded just under the pax seat.
    - RCAs directly from head unit to amp, about a 2-3 foot run.
    - all speaker wiring will run up or down the center hump first, then split left or right to the front and rear doors.

    Amp 2 (future small woofer)
    - under drivers seat.
    - power will follow amp 1, coming from pax side, under front of rear seats to avoid speaker wiring as much as possible.
    - small subwoofer wiring will travel down driver’s side past the main battery’s connector.


    Any feedback appreciated, even if you ran it a different way, I can know what does work.

    Thanks!
     
  2. Priapet

    Priapet New Member

    Joined:
    Sep 23, 2025
    6
    1
    0
    Location:
    In my Prius
    Vehicle:
    2008 Prius
    Model:
    LE
    Also, I set up my amp mount with a panel in the back. I like how it’s hidden, but it might block ventilation for people in the back. I don’t normally have any passengers. Any feedback if I’m forgetting something appreciated. :)
     

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