A professional subwoofer designed to complement and extend the low frequency output of any S-series full-range loudspeaker. Solidly constructed to ensure an accurate acoustic response that is uncolored by enclosure resonance, the rugged design of the S-series-218S handles the rigors of the road. The unit is characterized by a deep, powerful and compelling low frequency response that does not sacrifice speed of attack. The result is a rapid, punchy sonic signature coupled with sustained drive, enabling the 218S to easily handle most any musical challenge or special effects requirement.