SSL is a brand I recently came across I originally had a boss audio AR1500M monoblock MOSFET class a/b amp with 2 800w max q power comp 12’s it sounded OK but it overheated a lot so I upgraded to a SSL EV2.1600 and it was awesome no overheating issues and it sounds great I now have the sticker proudly in my windshield. My only problem is that it’s listed here for a lot less than the $138.95 I payed for it 5/17/2016