Boss Katana 50 MkII 1x12" Combo Amp, 50/25/0.5-WattThe BOSS Katana 50 MKII is an evolution in the line of quality guitar amplifiers made for maximized performance. The Katana 50 MKII is a 50 watt combo amplifier equipped with a custom 12 inch speaker that produces tones with clarity while acting as a host to a wide array of effects and appointments. The Katana 50 features a four way switch to engage three power output settings, 0. 5 watt, 25 watt, 50 watt, and standby to accommodate any performance