For your information the the output transformers are not all gauranteed for life. I have a 20 year old Defy DA 30 with a bad transformer and not only is it not covered they do not even have a replacement for it. Jadis will, however, be happy to sell me 2 current transformers for a paltry $2000.00 CAD. My amp will now become a pretty boat anchor! BTW, my amp is the same as a I-35... different transfo though!