So a couple of months ago I leave town for a weekend. Return on Sunday and go to listen to a new album and no sound out of my left channel. The amplifier is an old Threshold 400A. I leave it on nearly all the time with the volume down. Open the top of the amp and can see a couple of electrical components on one board burned black. Send the amp to have it repaired and it comes back. Hook everything up and think things are fine until I listen closer and the woofer on the left channel is not playing at all. Tweeter and mid horn both sound the same as the right channel, which has not been affected. I had been wanting to have the crossovers rebuilt and was hoping that was the problem but sent them to Crites for his rebuild and got them back and still no sound out of the woofer. Took the woofer out and plugged it in to the right speaker and no sound. So it sounds like a bad woofer. So, is there a suitable replacement for the the K48, would a recone solve my problem satisfactorily or do I hope I am able to come across a working k48. Would i have any luck with the factory? I have had the speakers for almost a year and really enjoy them but I've been without good sound for a couple of months and I miss it.