NavAtlas Nt308Bpk Subwoofer W / Mono Amplifier Pod Bundle The NavAtlas Nt308Bpk package provides a dominant addition to any NavAtlas sound setup. With the inclusion of an Nt308 passive subwoofer and a Bma500M amplifier, this bundle will enhance the bass and overall audio experience significantly. Features: Nt308 Subwoofer: Universal bar mount installation with adjustable hinge UV-resistant ABS plastic enclosure Ipx5 water resistant Impp black woofer cone Butyl rubber surround Peak power: 400 Watts Rms: 200 Watts Impedance: 4 Ohms Frequency response: 60 Hz - 500 Hz Sensitivity: 85dB Bma500M Amplifier 250 W X 1 channel 14.4v / 4 Ohm RMS power 500 W X 1 channel 14.4v / 2 Ohm RMS power Fixed low pass filter High quality waterproof connectors and cables