I have a kicker 4ch 600.4 amp and 2 kappa 6x9's 3 way and 2 pioneer 4way 6.5" and 1 kappa is cutting out. I checked all of the wires and nothing is loose and it only cuts out when it is turned up loud and everytime I mess with it, its good for about a week and then it cuts out again. Can the amp be bad? How can I check to see if it is the kappa or amp. Also I have 2 tweeters connected to the amp on the 6.5" speakers, 1 speaker cut out, but I think a wire is loose and the ch with just the tweeter playing is now causing the tweeter to crackle and distort. How can I check to see if it okay? Thanks