" The 10 MMD woofer is housed inside a bass-reflex cabinet to deliver tight accurate punchy bass with frequencies as low as 27Hzbr An internal amplifier provides 300W of power for strong clear audio with low distortionbr The rear panel features controls for phase crossover and level adjustment so you can customize the performance to match your space and applicationbr Rear-panel features a stereo RCA lineLFE input allowing the sub to accept signals from multiple types of receiversbr Isolation feet on the bottom decouple the sub from the floor to reduce vibrations and reflections br Infinity Primus 10-Inch 300-Watt Powered Subwoofer (Black)"