After reading through all the comments regarding Charles's different issues i'd have to conclude that if the tuning issue is not resolved it's most certainly a fault on the JTV and i'd be returning it to the store to let someone who knows what they are doing take a look at it. My JTV 69 has been perfect straight out of the box with no issues whatsoever. The only issue i have had has been the learning curve. To expect to get your head round this rig in 5 minutes is completely unrealistic. Firstly, because the possibilities and options are absolutely mind boggling to say the least. I finally traded in my trusty POD XT Live last week against a DT50 and i'm absolutely gobsmacked at the way the whole rig sounds. I also have a Roland GR20 guitar synth fitted to the JTV which fitted easily and works flawlessly. Just being able to mix a lush string patch with acoustic guitar sounds awesome. I also found that i didn't need to use the P.A. or any special speaker system to get a great sound out of the acoustics either. Just simply roll of the bottom end and it sounds crisp. Having owned many valve amps over the years including most Fenders Marshalls Vox's etc and finally ending up with a Mesa Boogie rig consisting of Triaxis/290/395/Mesa Cabs i know what these amps should sound like. Line 6 played a blinder getting Bogner to design the DT series amps and imho they have nailed it this time. The DT 50 sounds like what it is a "REAL" Tube Amp! Only problem, it weighs as much if not even more than any TWIN AC30 VOX or my old Selmer Zodiac Twin30 ha ha...... for those who remember that far back. And regarding the switching issue, even the most expensive boutique amps tend to have some lag and clunk when switching presets depending on the complexity of what is actually being switched. Pure genius!!! Hats off to Line 6! I'm loving my dream rig so much so......... any one wanna buy a used Mesa Boogie rig? Ha Ha