Electro Harmonix Queen Wah
The Electro Harmonix Queen Wah is a wah pedal that uses an optical sensor instead of a traditional potentiometer, which eliminates the scratchy noise and wear associated with mechanical wah controls. Its treadle is swept to move a light-sensitive element across a graduated filter, producing the characteristic vowel-like "wah" sweep as the pedal rocks back and forth. The pedal's response can be adjusted with an internal trim pot that sets the range of the sweep, allowing the user to tailor the low and high frequency extremes to their preference. A true bypass footswitch engages and disengages the effect, ensuring that when the pedal is off, the guitar signal passes through unaltered. The Queen Wah operates on a standard 9V DC power supply, and its compact enclosure is designed to fit on crowded pedalboards.
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