The Peavey PV 4 is a power amplifier designed for years of reliable, flawless operation under rigorous use. This amplifier offers the sonic superiority and unsurpassed reliability for which Peavey is famous, while remaining surprisingly compact. Advanced technology and extensive protection circuitry allow operation with greater efficiency into difficult loads and power conditions. The DDT (Distortion Detection Technique) circuitry ensures trouble-free operation into loads as low as 2 ohms. DDT protects drivers and ensures that sonic integrity is maintained, even in extreme overload conditions. The PV 4's high-efficiency design uses tunnel-cooled heat sinks and variable-speed DC fans. This cooling topology maintains a lower overall operating temperature, resulting in longer output transistor life.