I never had a question about the MB/GC Two Year Performance Guarantee until now. I bought my first LM II in November, 2007. Shortly thereafter, I received the PG paperwork in the mail and everything seemed to be in order. Experation date was 2009. In January, after experiencing a minor problem, I swapped it for a new one at GC. No questions asked. I just received the PG contract in the mail and now it states that the new amp has only a one year guarantee. Can anybody enlighten me?......Peter?