I know there are a lot of other threads on this topic, but I seem to be right 'on the line' where it comes to determining the generation of amp I am looking at.
I know gen1 amps have the mute button up until 2013.
2013 to 2015 gen1 had the play/pause button.
Sometime 2015 Gen2 came out.
My question is, what is the cut in date for gen2? I am interested in buying a used Amp with a 1508 (August 2015) serial number. Is this far enough in 2015 to be a Gen 2?? Or could it still be a late production Gen 1?