Keeley Neutrino Optocoupler Based Envelope Filter & Auto Wah V2

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From Keeley: Keeley's New Neutrino V2 Envelope Filter! The Keeley Neutrino V2 is an amazingly toneful and compact form of the classic opto-coupler envelope filter. The Neutrino takes your guitar playing and creates an automatic wah sound based on your pick attack! Envelope filters or auto-wahs as they are often called, sound and react best when they are opto-coupler based. The opto-couplers used in the Neutrino are particularly smooth, giving you an amazing vowel-like tone. The Keeley Neutrino gives you 3 filter ranges, 2 directions, 2 ranges for the frequency center and a Peak control. Keeley has engineered a power supply voltage-doubler so you maintain the highest headroom for your tone. An incredibly tough build means it will last for many decades to come. Whether you're in a jam band or playing funk, the Keeley Neutrino V2 delivers incredible vocal-like tone. Envelope Filter and Auto-Wah for guitar, bass and keyboard Peak Control: Sets how much "quack" there is, or how smooth you roll Filter Selector: lets you choose between 3 types of filters: High,Low, and Band Pass. Range Switch: HI or LO. Direction Switch: Up or Down True-Bypass, 9 VDC, 25 mA, 100% analog and made in the USA.