hey guys just tryin to get some ideas. i have a zx750.4 amp hooked up to a pair of 650.2 qs components and a pair of 6x8 ks680.2(i think that is the model) i have an alpine 9886 h/u. my problem is that when i turn the volume up at high levels i get a crackle sound in the mids of the qs speakers...