Weird rumble from sub at idle. Not with door open or when accelerating.

[Twistedmister]

Ok. So I have a 2013 honda pilot. Hooking up an re audio 3000.1 and an nvx 12. Had to use a line out converter. Used the loc on the mini sub in the back and ran it to my amp. Everything works but I get a constant rumble from my sub, but only at idle. And not when a door is open. Wtf?? I did put the left and right pos together and left and right neg together from the loc and tapped those into the speaker wires going to the mini sub.

4 awg power and ground

Good ground.

Tried multiple remotes

Wondering if its a faulty loc or maybe the splicing them together? Any help much appreciated. Tia

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[Boomin_tahoe 5,000+ posts]

Try diff RCA's?

 

[Twistedmister]

Thanks man. But it turned outto be the anc. Auto noise cancellation. Common in 2012 and new hondas I guess.