The Denon PMA-520 A is a stereo integrated amplifier with a built-in phono preamp. It has a power output of 70 watts per channel into 4 ohms or 45 watts per channel into 8 ohms. The amplifier features multiple audio inputs, including a dedicated phono input for connecting a turntable. It also has tone control knobs for adjusting bass and treble levels. The PMA-520 A is designed for use with a variety of audio sources, making it a versatile option for audio enthusiasts.