Friend of mine who has some very nice amps/pedals got a gt-1 a few months ago for quick record on practicing. I visited him yesterday and he said he almost never used it so I offered to take it and adjust some sounds at home. As he's so used to playing real amps, I'm pretty sure the filtered overall sound is the problem for him. Compared it to my setup, checked with analyzers etc... try this; go to "mast", adjust mid freq. to 10khz-mid. Q to 2-mid gain to 20. You can also decrease highgain by -2 or -3 if you like. Don't forget to adjust "out" to line/phones. This softens the filtering effect to the sound but keep in mind you'll have to adjust your current presets like lowering presence on amps or tone on pedals.