I've forward your concerns to Jack for his opinion before asking you to send the unit to us for inspection. I leave my personal WA7 ON or playing music all day. At shows, systems are ON all day, sometimes over night to keep the tubes warmed. At Capital Audio Fest, Dan (MrSpeakers) left his WA7d + WA7tp system powered ON all three days of the show (day & night). We don't recommend to do that because it does shortens the life of the tubes, but you can if you choose.
8/3/14 at 5:39pm