TroubleShoot My Problem PLZ!

[Mr.SoloDolo 10+ year member]

Cousin has 93 Acura with stock amplified BOSE interior speakers.

Installed:

AudioPipe 1500d

Alpine Type R 12"

Stinger Stinger Line Out Converter (tapped in to year 6x9's)

Problem:

*With gains all the way down sub is still getting signal from the car and pulsates enough to make the cone move a half inch or so.

*Sub gets bursts of power when certain things happen such as:

-opening passenger door (where power wire is ran)

-opening driver side door

-etc.

The amp is grounded very securely to the floor of the car.

Sounds to me like it's getting a highly boosted (distorted) signal at the lowest volumes and I have no idea where to start.

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[Mr.SoloDolo 10+ year member]

just need tips on what to check.

 

[DukeNut 10+ year member]

are the gains down on both the line out and the amp? or does that converter have gains?