I'm new to this forum and have been using axiom products for a while now and have been loving them.
However the EP600 V2 sub has been giving me some problems lately. With the receiver/tv turned off the sub will make a thump sound at irregular intervals. It works prefectly fine when the receiver is on and is being used but the only issue is that it makes a thumping noises once the receiver is turned off. It has only been doing this for the last month out of the last 5 or so years of owning the sub. What would be the issue?