I bought the ha-2 from ttvj and it came with a 1 year warranty and fresh refurbishment from Pete. I will take the cover off eventually but right now I'm just going to enjoy it since for at least a year any repair will be under warranty. Thank you for the heads up though. It def. runs hot. I can see why the Teton has such a big heat sink. The amp is very quiet so any increased noise should be noticeable. Really makes my hd800 sing imo. The v200 is probably the closest at the ha-2's price range and I still prefer the ha-2 with hd800's. Add in a brimar 5u4g, gec 6as7g, and Marconi b65 and you have something really special.