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Hello, my name is ***** ***** I am a professional here at Just Answer. I have noticed that your question was not getting a response and thought I would see if you still need help with this.I apologize for the delay and I hope I can still assist you with this here.Gary , from everything I have been able to read on your ANC/active sound control unit it appears to be designed to cancel after the unit is turned off. That being said you may want to check with your dealer to see if can be reprogrammed to stay active once the unit is turned off.
From what I know its suppose to but Im not 100% sure so Ill open the post back up for you and maybe another will know for sure.