Hey everyone- not sure if I'm putting this in the right forum.. but here it goes: My 5 month old Yaqin tube CD player with RCA 6SN7GTB tubes is having some issues. About 3 weeks ago, I was listening to a disc, and the music turned to pure static... -Tried another disc, pure static. - Powered the unit down and tried again the next evening.. managed about 25 minutes of music until the static kicked in. - Powered down the unit and tried again the next afternoon.. this time, I moved the unit off my shelving unit and put it in a nice open area thinking it could be overheating. Static kicked in about 20 minutes in to a disc. -Next day, I put the stock tubes back in, and managed an entire day of music without static! Managed about 10 discs over the course of the next week as well with no issues. -Today, I managed about 50 minutes of music, and the static was back. Could hot tubes caused the internal DAC to overheat or something to this effect? It does not feel abnormally warm, but heat is the only factor I could think of that would cause a CD player to sporadically malfunction. Really stinks.. this thing produces some fantastic sounding music :tears: Thanks guys!