The Mesa Boogie Dual Rectifier is a 100 watt guitar head that features 3 adjustable channels. Within the channels there are a total of 8 modes you can select from in order to dial in your tone. The selectable dual rectifier (tube/diode) and bold/spongy variac allows you to take that control one step further. Each channel also offers independent EQs and master controls. With Boogie’s fixed bias for 6L6s or EL34s, the amp allows you to change tubes without the need of an amp tech present. From its sparkling cleans to its punishing gain the Dual Rectifier has caught the ears of many since 1989.. Included accessories: Other(FOOT SWITCH).