This is driving me nutts... was in a gig, not in important gig, but a gig all the same and it keeps dropping... cannot change tone etc, what a bag of sh1te, i looked like a right nob out there.. thanks Line6, I have 75 and it turns out to be a 15W practice amp, then i get a 150W and the speaker is ony a 50W rating.. both drop the data channel for no reason, tried ipad, ipad mini, andtoid tabs... its all flawed and buggy, load of cr@p.