I got BB King's favorite amp for ... $50 ! The Lab Series amps were developed by Bob Moog for Gibson parent company Norlin in the 1970s. They feature a solid state design with a very tube-like tone and an interesting EQ section which allows you to dial in the exact midrange characteristics you prefer. Supposed to be a Twin Reverb contender. It sure has the weight ! At first play for 1/2 hour, there's a ton of tones in there to be discovered. Second channel has a frequency knob, sounds just like a wah. Also a multifilter, that I'm not sure what it does. A compressor too.