New Keeley Neutrino V2 Envelope Filter Guitar Effects Pedal.

This item is new, in box.

Orders placed before 12:00 PM Eastern Standard Time will ship same day! Orders placed after 12:00 will often ship same day as well, if not, they will ship next day.

Domestic orders will ship via Fedex 2-Day (Priority Mail also available).

International orders: Please note that you will be responsible for any applicable customs fees or import taxes!

I am an Authorized Dealer, a store receipt will be included with your purchase.

Check my feedback and bid with confidence!




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.