The Avante Audio A18S Achromic Series is an 18", active subwoofer with a 1600W peak dynamic amplifier and an integrated DSP, well suited for a variety of applications including clubs, bars, mobile DJs, public address engagements, schools, houses of worship, fitness centers, and more. The Class-D amplifier delivers 500W (RMS) to the woofer and provides a frequency range of 35 to 150 Hz with a peak SPL of 127 dB.