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Message: <blockquote data-quote="THATpurpleKUSH" data-source="post: 8599530" data-attributes="member: 615398"><p>This is happening to a friend of mine who lives 150 miles away. 2 days ago I was visiting and we unhooked his DD 2515sc from his Diamond TX1000.1 and swapped in a Sundown E10v3 that I just built a box for. When we turned his car on, the sub made a thump sound when the amp turned on. There is still a thump after we put the DD back in. We didn't touch any other wires or play with any settings on the amp. He's been running the DD sub for over a year with no issues until we recently unhooked it and played around with the Sundown. Headunit is a Kenwood X500. Wiring is Knukonceptz Kolossus OFC 0ga with Knu Krystal RCA cable. I told him to check the grounds and he said they are good. The thump happens regardless of what input source (cd, usb, radio.) He said it doesn't thump when he disconnects the RCA cables. How do we make the thump go away?</p></blockquote><p></p>

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