As a 20 something with my first rig all adcom gear including the GFA 555? 200 watt power amp. While setting it up for the first time I bare wired the amp not noticing one strand touching the other terminal and faster then you can say Jackie Robinson the amp was cooked. If I recall back then they did not have protective fuses.Lucky for me Adcom was in New Brunswick NJ at the time and just a 30 min. drive so off I went dead amp in hand. For a dozen donuts they fixed the amp and did some other updates while I watched.I am forever thankful to Adcom for the kindness they showed this kid.Once shocked I don't bare wire,lol. Humm good reminder I think I'll check my connections.