Roland CB-60XL 60-Watt Cube Bass Amp Bundle with Tuner, Instrument Cable, and Polishing Cloth Compact 60-watt bass amp with custom-designed 10-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