Just swapped my biketronics amp for the new J & M amp i bought from Dr. Vtwin. Good people & deserving of ur business. Was having problems with radio over heating and shutting off. My old biketronics amp and new J & M speakers were not compatable. Took a little over an hour. Very easy to understand instructions. This is a high quality amp, well constructed. Had several other systems prior but without a doubt the J & M 7.5 speakers and J& M amp is the best set up bar none. Loud, clear sound with actual bass. If u what the most out of your fairing mounted stereo system get this set up. Clearly hear and enjoy your tunes at 90 +. No bullsh.t.