It includes QD Bass technology for a down-firing driver placement that provides high power and a smooth frequency response. The subwoofer is designed with a 10" multi-range driver and a high-density MDF cabinet for reduced vibration and resonance. The YST-SW515 offers a frequency response of 20 to 160 Hz and includes a selectable high cut filter of 40 to 140 Hz. It features a high efficiency amplifier which delivers a high level of power output while minimizing power consumption. The subwoofer is also eco-friendly and has an auto standby feature, using only 0.5-watts of power once in standby mode. The subwoofer comes in a black finish and has a suggested retail price of $650.