My PB12 has had the dreaded and oft reported internal amp failure. Since it is less than a year old JBL repaired the amp under warranty. According to the paper work there were two capacitors replaced. Has anyone experienced a second failure? If so, what is JBL doing about the second failure if it happens more than 12 months after purchase? I love the tight bass from this sub, and am VERY happy with my S-312's, S-Center, and S-26's, but this failure has left a bad taste in my mouth.