I just bought a 2013 SG with a biketronics amp and 4 speakers, it did not operate when I purchased the bike so when I took apart to see whats up ,( it was a dead amp with blown fuse) I saw lifetime guarantee on the amp cover, I called Biketronics, spoke with the owner who walked me through a troubleshooting procedure, he said the amp is dead, send it back, I packaged it up, sent back and 3 weeks later received my amp back. the system kicks ass, he said they had an upgrade on the harness and sent that as well, free of charge, he even picked up the shipping tab. Great product, made in the USA, great service. I highly recommend Biketronics.