The U.S.A.-made GPS Global Power System series represents more than 30 years of power amp development at Peavey and builds on our worldwide reputation for quality and reliability. The GPS 900 and 1500 feature our patent pending Turbo-V Cooling™ technology that cools the power transistors more evenly and extends the life of the amp. “Turn on” protection protects both your speakers and your power amplifier. DDT™ speaker protection and dual variable speed fans make this your best choice for all professional applications.