Horns up! This big black box is all about the gain perfect for heavy metal tones, with three different modes controllable with the switch, as well as separate bass and treble knobs for greater EQ controls.
 
Features a 1/4 inch input and output jack and a DC in jack. True bypass. Boxed with instructions.
 
CONTROLS
Gain knob
Volume knob
Bass knob
Treble knob
Mode switch