The Wah is based on a 1967 Class A circuit design that featured a unique Halo inductor which is essential to its vocal-like qualities. Players and collectors who search for vintage wah pedals pay a premium for these rare examples. BBE has re-engineered and Custom-Tuned the Halo inductor to re-create the expressive tones made famous by players like Eric Clapton and Jimi Hendrix. In addition, The Wah's potentiometer was designed for the ultimate dynamic sweep response. What's more, a Harmony control is added so you can custom tailor the wah to your personal taste. All components are Hand-Wired for the ultimate in vintage authenticity. As with all BBE pedals, the Wah features an on/off LED status indicator plus True Hard-Wire Bypass for a clean signal path when the effect is bypassed.