Marshall 1960B-KIT-1 4x12 Guitar Extension Cabinet Kit Speaker Type: Celestion G12T-75W, Speaker Configuration: 4 x12 Power (RMS): 300W Selectable Mono/Stereo: Yes Impedance Stereo/Mono: 8 ohm, 16/4 ohm Includes: ChromaCast Pro Series 10ft Cable and ChromaCast Pick Sampler