Tech21 Killer Wail V2

A Vintage-Inspired Wah, Free from Its Flaws

The wah-wah is one of the most expressive effects in guitar history: it "speaks," accentuates attack, and transforms a simple riff into a musical phrase. The problem is that a traditional wah can bring its share of drawbacks (crackles, potentiometer wear, audible triggering, and unreliable long-term performance). The Tech 21 Killer Wail V2 embraces the spirit of vintage wahs while modernizing the internals: here, the pedal position is read via an optical sensor, for silent and durable operation.

For Which Guitarists and Styles?

The Killer Wail V2 is aimed at all guitarists who want an expressive, stable, and stage-ready wah: from intermediate to professional level, in the studio or on tour. It excels on funk rhythms (sharp pick attack, chicken picking), adds bite to rock solos, provides very vocal articulation in blues, and fits perfectly in fusion or pop when seeking dynamic movement without unwanted noise. Its sturdy format and top-mounted jacks make it a natural candidate for a compact and reliable pedalboard.

Controls and Modes: 3 Sweeps to Shape Your Sweep

The Killer Wail V2 operates like a classic wah: a rocker underfoot to sweep the filter, and a triggering mechanism designed to remain discreet to the ear. The key element is the 3-position selector that changes the filter behavior according to your register: HIGH emphasizes the high frequencies (ideal for cutting through the mix in solos and for very snappy funk chords), EXTENDED covers the full range with a smoother curve (perfect for clean sounds and a wide, progressive wah), and DEEP boosts the low end to highlight the bass strings and thicker riffs. Since the circuit is based on a filter that also adjusts the Q (resonance), the transition is livelier and more "instrumental" than a simple frequency sweep.

The Sound

The Killer Wail V2 offers a vocal, snappy, and musical wah, with very direct responsiveness to right-hand playing: the harder you attack, the more the effect seems to speak and stand out in the mix. The HIGH mode brings a sharp and precise edge that highlights harmonics, EXTENDED provides a broad and controlled movement for arpeggios and cleans, while DEEP accentuates the round and massive character of the lower positions. Thanks to the optical sensor, you enjoy consistent performance over time, without degradation related to wear, and a more confident use in the studio (clean takes) as well as on stage (no unwanted noise when engaging the pedal).

Technical specifications

Effects	Wah	Use	electric guitar
Format	Pedal	Color	Grey
Type	sector

Custom-designed filter	variation of frequency and Q (resonance)	Footswitch	soft
3 sweep modes	HIGH / EXTENDED / DEEP	Dimensions	20 x 8.6 x 4.9 cm
Bypass	buffered	Weight	700 g (approx.)
Top-mounted jacks	yes	Designed in	USA
Stereo	no	Made in	USA
MIDI	no	Power supply	no
Supply voltage	9V	9V battery	no
Polarity	DC center negative	Measured consumption	2 mA
Battery compartment	yes (9V battery)	Required voltage	9V DC center negative
Phantom power	possible via certain Tech 21 Fly Rig units (modification required)