I 've had 2 Infinity reference series 1230w subwoofers for about a year now and about a week ago one of them stopped working. The sub just kept cutting in and out. When i pressed lightly in the center of the cone it would come back on... I checked all of my wiring and everything seems to be fine and now the sub won't work at all. to make things worse, my 1 working subwoofer started doing the same thing today. They don't sound blown at all but i know the problem lies within the subs. Any ideas???

Car Audio & Video - Infinity - Reference 1230W Car Subwoofer