The New amps that J&M are producing are a real inconvenience to the average consumer. J&M has made the amp so that you have no gain controls or switches on the exterior of the amp which make it a simple adjustment that you can manually adjust the amp to the way you like it. Instead J&M has made their amps programmable which means You need to program the amps through a patch cord and download a fix for what ever your set up you may have. Keep in mind that this patch cord and downloads are going to cost extra. Which is going to add extra cost to the amp. And to add insult to injury the amps are available but the downloads are not. I am not that great at computers and can barely figure out how to use them, and J&M expects the average Joe to be able to do this... In my opinion this is going to impact sales. I am going to return mine to where I bought it because a amp should not be such a pain to deal with.