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T-Rex Engineering Shafter Wah Wah Guitar Effects Pedal

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Input impedance @ 1KHz:    Higher than 1M Ohm
Output impedance @ 1KHz:        Lower than 1K Ohm
Power supply:     9V DC (T-Rex FuelTank)
Minimum power supply voltage:     8V DC
Maximum power supply voltage:     12,5V DC
Current draw @ 9V DC:     45 mA
Maximum input signal V p-p:     3V p-p
Battery type:     9V battery 6F22
Battery life:     max. 4 hours
External connectors:     input jack, output jack, 9V DC jack
Controls:     on/off switch, hot spot switch, boost, wah mode, slope
Pedal size incl. knobs (W x H x D):     96 x 78 x 264 mm / 3,8 x 3,1 x 10,4 inch
Weight excl. packaging:     1,060 kg / 37,4 oz

Manufacturer's Description


The T-Rex SHAFTER is our best shot at a genuine new-generation wah-wah pedal. With loads of adjustability, a much wider frequency sweep, quieter operation, greater durability and 3 completely different “wah” characters, it addresses all the weaknesses of the classic wah point by point. We think it’s the best wah-wah ever made, and we know you’ll love how it sounds and performs.

A rugged, highly versatile wah-wah effect that puts you in charge of your pedal instead of the other way around.


  • 3 completely different “wah” characters
  • Custom made coils & inductors enhance both growl and wah
  • Highly tuneable via boost and slope knobs
  • Hot spot switch for classic or “heal to toe” sweep
  • Potentiometer-free operation prevents noise and mechanical wear