Hey I got a PreSonus TubePre... shit is off the hook for the price... I really like it. The only thing I dont like is that it has no On or Off switch... you just plug it in and its on... So I was wondering if its cool to leave it on for long periods of time, I usually let it warm up for a while before using it... seems to sound better like that. Is it better to just leave it on? Its it cool to be plugging it and unplugging it? Thanks everyone... :beard: