Zapco Monoblock 20840W RMS Class D Low Range Bass Amplifier ZX 26KW Zapco Monoblock 20840W RMS Class D Low Range Bass Amplifier RMS Rated Power @ &lt; 0.05%THD Power @ 2?: 1 x 20840 watts @ 16v Power @ 2?: 1 x 20000 watts @ 14.4v Power @ 2?: 1 x 13550 watts @ 12v Power @ 4?: 1 x 11550 watts @ 14.4v SPL competiton class D linkable mono block amplifier Four huge MOS FET PWM power supplies Dimensions in Inches : 11(W) x 6(H) x 38.5(L)