Roland CUBE-120XL 120-Watt 1x12-Inch Bass Combo Amplifier Compact 120-watt bass amp with custom-designed 12-inch coaxial speaker Dual custom-designed Air Flow Port for deep bass and punchy sound Eight COSM amp models, including the new SUPER LOW amp Seven effects, including the new DRIVE and POLY OCTAVE SOLO function with memory for use as a second channel