Yamaha VXS10S Surface Mount 10-Inch Subwoofer (Black)10" dual voice coil subwoofer for low impedance systems. VXS series "S" model subwoofers are ideal matches for VXS and VXC series speakers, smoothly extending the low frequency range with superb sonic quality for bigger, more true to life musical reproduction. Although no larger than a compact surface mount speaker the VXS3S delivers solid, natural sounding low end reinforcement, while the VXS10S and VXS10ST make even more low frequency power