AXL Solid State Keyboard Amplifier, 100 Watt by AXL. $419.99. The KB-120 Keyboard Amp has 100 watts RMS power, a 12” Alphatone speaker and four inputs with independent volume controls. The inputs include 1/4”, XLR and RCA jacks.  Sonically, the amplifier has excellent bass and punch whenever needed, and nice transparent sound with little or no coloring. This amp gives you the ability to hear what you’re playing and enhances the keyboard sound the PA might miss.  Th...