YAMAHA P2500S POWER AMPLIFIER Great offer on this popular amp means a saving of more than 50 off our previous catalogue price. The "P" series power amplifiers by Yamaha not only provide the user with excellent cost per watt value, they build on that cost performance with efficient power consumption. Utilizing Yamaha`s new EEEngine technology, these amplifiers deliver outstanding sound quality with remarkable efficiency. All of this power and performance comes in a compact 2U rack-mount size that makes installation and transport easy. If you need transparent amplification with excellent reliability and superior performance, give the "P" series a closer look. P2500S 275W St 8 ohms, 390W ST 4 ohms, 780W Mono Bridge.