Weird sound or noise from sub

Toomuchheart

Member
:
08 mazdaspeed 3 GT
I recently had a single 12 and amp hooked up to my stock HU. Everytime I turn my car on the sub makes a super loud "ohhhh" type sound. I talked to the installer who said it makes that noise due to the radio powering on everytime I turn my car on. Has anyone else had this problem and if so how'd you fix it?
 
I have had that happen. I run 2 12's and and amp on my stock HU with a manual controller ... i found that if you turn down your volume (both on the sub control and the radio) it doesn't make that sound or if it does its really quiet ... i think its something we are just going to have to live with ...

unless someone else has any other ideas
 
I have it from both the sub and the extra speakers I added. And I grounded the living (k) out of everything with redundant ground wires with welding cable, and I have the line outs running down the opposite side of the car away from the power lead. So yeah, I think you just have to live with it and remember to turn your stuff down when you shut it all off.
 
it never been happened to me. strange.... try to check. lol


it doesn't happen to me all the time, it seem as if it only happens when im playing a song with alot of bass in it and i leave s*** turned up (not ALLL the way) and then shut the car off. in the warmer months i could care less, its when they are cold and frozen in the -45 crap we get that worries me.
 
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