Constant Buzz From Amped Speakers

[rideredcr125]

Hi everyone! Im looking for a bit of help. I just recently installed an amp for my rear door speakers (front speakers are not amped). The HU is stock and all speakers are stock. The HU is plugged in to the Amp via Hi-level inputs.

The buzzing coming from the rear speakers is constant and does not change with engine RPM or with volume changes, but the buzzing does get louder when the brake pedal is depressed.

I grounded the Amp to a bolt holding down the rear seat. I removed all paint and ensured it contacted bare metal before installing it.

The buzzing disappears when you toggle the HP/off/LP switch to the LP position.

JL Audio JX 360/2

2012 Chevy Cruze

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[big scott]

what amp is it?

 

[rideredcr125]

JL Audio JX 360/2