Power amplifier series img stage line sta number of channels 2 rack height 2 ru dimensions 482 x 98 x 296 cm weight 11 kg inputs 2 x jack 1 x rca features ground lift frequency response 10 20000 hz distortion factor 005 power output at 4 ohms 275 power output at 8 ohms 200 signal noise ratio 85 db cooling system fan