After I installed bt6100, theres a weird buzzing noises from the engine bay (with engine off). If I unplug the bazooka tube, the noise is gone.
The car is a 2006 Lotus Exige, direct power is hooked up to the battery terminal at the front of the car, the tube is in the cabine, engine is in the back of the car, and battery is also in the back.
The noises are not from the speakers, just from the engine bay.
heres a video of it.
Note that the steady tone is not the noise im talking about, at 15sec you can hear that buzzing and scratching sorta sound.
Any idea what causes this?