Shelby is a hi-gain distortion pedal, all done with FETs! There are two pairs of JFETs in mu amp configuration- basically like a pair tubes- which sound like a cranked amp. The distortion is real feeling and full of harmonics and beef. In total there are 3 stages of gain with 18V of headroom thanks to an internal voltage doubling circuit.
Current draw: 30mA at 9V
Impedance: 1.1MΩ input impedance, 150Ω output impedance.
Power: This pedal can be powered by a 9V battery or a 9V DC adapter (2.1mm center negative). DO NOT USE MORE THAN 9V! The input voltage is doubled internally to 18V, using more than 9V will blow the voltage doubling circuit. Unplug the IN jack to preserve battery when not using pedal. When a DC jack is inserted into the DC plug the battery is disconnected from the circuit.
Size, weight: (LxWxH) 12.6 x 6.6 x 5.7cm, 280g without battery
Operation: Vol: Raise or lower the output volume. Dist: Raise or lower the amount of distortion. Tone: Sets how much high end is cut.
The Dist knob takes the pedal from hard crunch to full on dimed amp. The Tone knob is a harmonics control and will calm the bite of the distortion. Shelby is full of harmonics and overtones, with tons of presence and bite.
Shelby takes boosts very well. Hit it with a clean boost, Klon, Tube Screamer, treble booster...for beefy amp-like distortion. It’s really loud too, so will hit the front end of an amp with ease.