bish225

I'm gonna try to keep this simple.
Factory head unit
2 alpine type r
Alpine 1100 mono amp

I keep getting a massive growing reverb from the subs. Once it starts it gains loudly! Quickly shutting off the car. Now here's where it gets fun. It didn't do it when the system was tested with the subs out of the car but amp in the car. I tried 2 converters ran on sub signal and same result. So I'm currently running the alpine direct harness to the amp. Once again works awesome out of the car. Put the box in and goes bad. So I searched! Found info on the ANC! Hot damn is this it?! .... nope... I undid the rear mic, the front mic and removed the ANC module. Victory!? Nope still does it. I turned the sub off on the HU and check it again and still get reverb. I'm at my wits end and have the hatred of finding out your ex is still using your credit card! Any help would be awesome!

QuickTL07

Cancel your credit card, and take it to a shop lol

what kind of converter did you try, how are you getting your signal to the amp?
where are you tapping at the rear sub, before the stock amp? please be more specific.

bish225

I must apologize I finally figured it out. The previous owner had botched so of the wiring for the signal. Alpine mrx monoblock amps have a built in converter. Just rather than rca's it runs based off the speaker inputs. So I ran the sub input to all 4 speaker inputs and it cleared that all up