The Canton Sub 500 R is a subwoofer produced by Canton, a German audio equipment manufacturer. It is designed to enhance low-frequency sound reproduction in audio systems. The Sub 500 R features a built-in amplifier and a front-firing 12-inch woofer. It has a frequency response range of 20Hz to 200Hz and offers adjustable volume and crossover frequency controls. The subwoofer is known for its powerful and accurate bass output.