I have had my diamond 8.3 speakers for 2 years now. The sound i get from them is has been amazing. Just recently one of speaker`s base driver has started to develop a crackling sound which has destroyed that perfect sound!! I guess that the base driver is broken due to my house mate playing it excessively loud!! What do I need to do to fix the problem. I have guessed that I`ll need to replace the base driver. They are 165mm kevlar cones. i have looked on the internet to find where i can buy one but i have had no luck. Could anyone help me with this and give me an idea of how much it would be. Cheers!