1UAudio PA-500D Class D power Professional Amplifier * Class-D hight efficiency, low imdependance high current output design * Total harmontic distortion : < 0.1% * Input sensitivity : 775mV * Signal to noise ratio : > 100dB * Frequency respones : 5hz 37KHz / -3dB * Built-in thermal control cooling fan * Protect: cliplimit, DC, short circuit, over current, overheat * Operating voltage: 115VAC / 230VAC switchable * Height: 1U * Dimension (L xW x H) : 482 x 44 x 336 mm