I bought a B Stock Parasound HCA-1500A from Audio Authority back in May , it looked at worked like new so I am not sure what a designates a B stock. Anyhow a few weeks ago I was moving some stuff around and shorted out the plug when I bumped the cheater plug, "BANG!" then electronics smell ... I was pretty mad at myself for being so careless. :b I contacted Parasound via Email and got a response in 12 hours. Even though the amp still worked the tech suggested I send it in to be checked out. I called , got an RMA , sent it in and got the amp back in under 7 days. They repaired a blown capacitor in the ground circuit and checked over the amp. They fixed it , checked it out and shipped it back to me at no charge. They could have easily charged me since it was my error but they did not. The entire process was very smooth , fast emails, fast and friendly phone help when you call them. I'll be sticking with Parasound for my amplifer needs for some time...now if theyd just make some more goodies for the regular Parasound line. I'd like to see some DACs, SACD players, CD players, another HT pre-pro and more!