PRE-OWNED QSC USA 850 PROFESSIONAL POWER AMPLIFIER. Working in nice condition with the some scratches on top from rack mounting. The QSC USA 850 is a power amplifier for professional applications where low noise and clean signal is mandatory.With 240W of power per channel at 8 ohms. The USA 850 is capable of reproducing a frequency response of 20Hz to 20kHz. This item is in the category "Musical Instruments & Gear\Pro Audio Equipment\Amplifiers". The seller is "2gr8guys" and is located in this country: US. This item can be shipped to United States.