I have recently purchased the 75 model and I can't quite make my mind up as to whether it is genius or rubbish. It seems needlessly complicated for one thing and why on earth, as suggested, is there not at least a downloadable userguide? The supplied manual is fairly useless. The app is frustrating to use and seems overcomplicated. However, there are some great sounds to be had from this amplifier with a little experimentation.
As a music streamer, it really needs a basic eq control as the streamed songs are much too bass heavy for my (and my neighbour's tastes) and yet there doesn't seem to be any way to alter this.
Also, how does one record to the computer using the usb port? I downloaded the Updater package as advised but this fails to even recognise the amp! So come on Line 6, sort it out please - this is your reputation at stake here.