I jut installed Calibra 2400w amp, a sub and calibra 7" x 10" speakers on 2010 Hyundai i20.

When the car is idling the sounds goes up and down on an amp( seems as if amp cut out) but when the car is off (engine off), sound plays ok, what can I do to solve this problem?

  • 1
    Welcome to Motor Vehicle Maintenance & Repair! Mar 3, 2019 at 13:17

1 Answer 1


I believe you're going to need to install an audio capacitor inline with the power feed to your amp. It seems the voltage is probably fluctuating enough while the engine is running for the amp to not want to play nice. A capacitor will cover for those variations and should allow the sound output to stabilize.

  • Probably need a blocking diode as well...
    – Solar Mike
    Mar 3, 2019 at 14:04
  • A cars electrical system can only do so much.
    – Old_Fossil
    Jul 12, 2023 at 3:49

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .