sub buzz

[Clayton Hartweg]

So I'll be driving on the road and my sub will be playing and it will cut to about 3/4 sound level and start making kind of a popping noise I turn the signal level down on the RCA's that are going to the sub amp and then it makes a high-pitched whine louder than an alternator wine but I cannot stress enough that it is not alternator wine I get out of my car Pop the trunk and I knock on my amp and the noise goes away I have even unplug my RCA's when it is making the noise and the noise still goes through to the sub. I have relocated rewired the amp the positive is directly on the positive terminal and the ground is also so I do not have a bad connection. the sub is not blown there's no cracks when I push it down and all my gains are set fine I've been using the set up for about a year now that just started doing it. fi bl 15, Q1-2200.2, 2xs power d3400, 220 amp alt