The DXR15mkII achieves class-leading maximum SPL of 134dB and full bandwidth performance by combining a powerful Class-D amplifier with a high-power woofer and Yamaha's cutting edge technologies. Throw in some D-CONTOUR and you'll feel like you're using a subwoofer. • 15" Powered loudspeaker with 1100W Class-D power amplifier • The DXR15mkII achieves class-leading SPL with stunning clarity throughout its frequency response range • Newly equipped with 1. 75" Neodymium HF compression driver and high-output 15" Lf unit for vocal reproduction and outstanding bottom end • Maximum 134dB SPL of power and wide frequency response range of 49hz-20khz • Ultra-precise 48bit DSP processing for clear high-definition sound and built-in d-contour Intelligent dynamic control