The Old Blue is more than just a pedal...it's been Rex Brown's go-to pedal for over 30 years. Rex began collecting Morley pedals as a young man in the 1970s and acquired a Pro Series II Wah "Old Blue" in the 1990s. The Old Blue has never left his pedalboard since, appearing at countless live shows and on numerous albums, including Pantera's "The Great Southern Trendkill" and "Reinventing the Steel." The Old Blue is a revamped recreation of Rex Brown's Pro Series II Wah. It uses the same through-hole components and circuit layout as the original, but the sweep has been tweaked to Rex's tastes to recreate the sound of the original 1970s Morley Wah. The circuit is based on Morley's 1992 redesign, which introduced switchless activation and retrofitted the classic wah circuit with modern optics. A key feature of this old-school design is that it doesn't skimp on frequency range. This gives you the intense, sweeping effect found in Morley's original 1970s wah pedals, while also being virtually immune to external noise and EMI. Other great features of the Old Blue include switchless activation (just press the pedal to turn it on, take it off to turn it off), a wah level control with 15dB of headroom, premium buffer circuitry, LED indicators, and glow-in-the-dark treadle grips. Like all Morley pedals, it's built like a sturdy tank using cold-rolled steel.■The Rex Brown Pro Series II Wah has been modified and reproduced using original circuitry and through-hole components. ■15dB wah level control. World-famous electro-optical design. No pots to wear out! ■Switchless activation: Press the pedal to turn it on, and release the pedal to bypass it. ■Premium buffer circuitry delivers pure instrument tone and output. ■Pedal rubber that glows in the dark. Power: One 9V battery or most 9V AC adapters (center negative) *We recommend the Vital Audio Power Carrier series. ■Get great sound with bass, guitar, and keyboards. ■Rugged cold-rolled steel housing. ■Dimensions: Classic Morley pedal size 232 x 149 x 70 mm (length x width x height).