So I bought a used Hartke LH1000 to keep at the practice space, but before I lugged it over, I decided to play with it in the bedroom with my LDS 15/6. As soon as I turn it on, I hear a tick tick tick as the fan is blowing. I unplug and screw off the top to take a look inside: Neatly organized guts. I did have to tighten the four screws on the bottom as my large cheese wheel was a little loose I can't seem to find what would be making this noise. So I turn the amp on and notice it immediately. Sort of a Seinfeld/Marine Biologist/Whale/Golf ball moment: it was a wing! It was hanging by a cobweb gently knocking into the rear fan...spider must have vacated long before... Anyway, while I was here, I thought I would pull the preamp tube. Since I bought it used, does anyone know if this is the stock tube?: So I buttoned in back up, plugged in my SB5000 and went to town (Hey, Literal Police, I didn't leave my bedroom). I was having so much fun tweaking the "simple" EQ, I didn't realize I was playing for almost an hour. Don't let those three knobs fool you, the EQ is quite potent. All knobs at noon are definitely not "flat" but did sound pretty good. Kill the treble, dime the mids and back off the bass some and you have yourself a nice finger-style groove thang working. Countless other settings later, I soon realized that this amp stays almost completely clean as you bring up your volume. I had it bridged @ 750W into my 15/6 and it was shaking the pictures off the walls with clean clean tube mojo! I may add something later (ie VT pedal) if I want some dirt, or swap a preamp tube, but right now I can't wait to try it with the band and see works best!!!