The Denon PMA-520 is an integrated amplifier that features a robust design aimed at delivering quality audio performance. It typically includes multiple inputs for connecting various audio sources like CD players, turntables, and digital devices. The amplifier usually possesses a power output of around 70 watts per channel and supports both speaker A and B outputs. It often incorporates a built-in phono input for vinyl playback, allowing for direct connection to a turntable. With features such as tone control and a variable loudness function, it is designed to offer versatility in sound customization.