Is there a difference in the tone of an amp if it sits on the ground or on a stand. thanks guys
slightly less bass but nothing significant

Tell me what nation on this earth, was not born of tragedy-Primordial
You'll notice it more with open back cabinets and yes the Bass does drop off a bit.
Moving on.....
So the sound is more bassy if on the ground. I like the sound better, but worry what the audeince will hear.
wont be a big difference, so dont worry too much. i'd only bother with a stand so that i dont have to bend over to change my settings and such. but, it's not worth my money....yet
Save Gibson

^Do it, if you want Gibson to stop with the poor QC and terrible new guitars...