The Flattley Wah is based on the principles of several classic Wahs that use a filter known as the twin t resonant filter. During development, several genuine classic Wahs were analysed to determine the characteristics that give old Wahs that sound. The Flattley prototype Wah pedals were tested by several experienced users of older classic Wah pedals until they were satisfied that the sound was right. The Flattley Wah is a very tight, articulate and vocal sounding Wah pedal which can handle as much gain as you want depending on your style of music. It also remains very tonal if being used clean, giving you an awesome individual expressive tone that will wow your audiences. The Flattley Wah comes with a 100K potentiometer installed which was designed and manufactured to exacting Flattley specifications. A standard feature with the Flattley Wah is the signature blue LED light plate which gives you full visibility on stage of the pedal's status.