Electro Harmonix Double Muff

     This pedal has two knobs, each of which controls the volume of a separate Muff overdrive circuit.   It also has a toggle for switching between single and double modes.   In single mode, the overdrive is warm and slighly ragged, with a fair amount of sag.   In double mode, depending on how you set the knobs, the overdrive ranges from fairly light to higher gain distortion tones.   With the first knob higher towards full-on and the second knob lower at about 11:00, the tone is fat and grainy.   With both knobs at noon, the tone is fairly transparent.   With the first knob at 2:00 and the second at full, the tone is high gain and thinner than the first setting I described, with a tighter bottom end and a bright high end.   It's all in how you set each knob, you can get a fairly wide variety of tones and gain levels depending on the settings.   One thing though, since the knobs control the actual volume, certain settings can be a little on the loud side.
     This pedal is fairly inexpensive and is a great deal for the money.   Maybe if it had a tone knob and a master volume it would be a little more versatile, but that would be a different pedal altogether.   As it is, it's a fairly versatile and unique pedal that only costs a little bit of money to own.