Hi all, purchased a used Eminence 1028k for my 2x10 amp. Installed and played at bedroom volumes and all sounds good, but after turning amp up, some of the lower frequencies are causing the speaker to buzz and distort. Removed the speaker and connnected it to a head, same issues... kind of a Kinkish buzz going on and low notes are resonating for longer than usual with a distinctive buzz. The cone looks fine, no visible tears or holes etc. In a perfect world I should just send it back to the seller for a refund, but I bought it a long time ago, so that is out of the question... Guessing I should just buy a new one, as I have no idea how to fix the problem. Anyone have similar issues? Anything else I can do ?