A Staple in the World of Music Since the 60s
The wah wah effect was made popular by some of the most influential guitar players in the world. Nostalgia, however, tends to make us forget some of the shortcomings — excessive noise, tendency to be thin sounding with certain guitars or pickups, and unstable mechanical construction.

Merging the Past and the Present
The Killer Wail overcomes the classic wah's faults while preserving the original circuit design. Tech 21 has utilized superior quality switching in a beefed up, cast metal, chrome-plated housing held together with a solid bolt. And they've incorporated some new features to further enhance its performance.

Features
Mode Selector Switch: Provides a variety of curves for greater flexibility — for bass as well as guitar.

Humbucking Inductor: Custom wound and potted inductor coil cancels noise and reduces microphonics while faithfully reproducing the saturation and harmonics of vintage wahs.

Bypass Switch: There's an extra pole to remove the circuit load which can muddy and weaken the signal.

High: Moves the wah filter to the high range of the guitar. Notes on the G, B, and E strings will be accentuated. This mode is perfect for leads or funky staccato chords.

Extended: Tunes the wah to cover the entire range of the guitar. In this mode, the filter is not so "peaky" and is a good choice with clean guitars when you want a smooth and wide sweep. This mode also works well with distorted rhythm chords and riffs.

Deep:… read more Moves the filter down to accentuate the lower strings of the guitar. This setting is perfect for use with 7-string guitars and bass guitars.

Killer sound: The Killer Wail is considerably warmer and more "musical" than conventional wahs. Each of the 3 modes offers a wider, smoother, and more even sweep. read less