Blue Octave Home SW15F Subwoofer (Black) 15" Front firing long throw subwoofer, built-in high efficiency amplifier 650 Watts dynamic power, 325 watts RMS, 25Hz - 260Hz (+/- 1dB) frequency response, 99dB sensitivity High rigidity PVA treated cone with butyl rubber surround, high density MDF cabinet design RCA line level inputs, stereo speaker wire high level inputs Applications include surround sound and home theater