Tech 21
Tech 21 Killer Blue Wail Bass Wah Pedal
Bass effect pedals€234.01
Available from Gear4Music at €234.01.
The Tech 21 Killer Blue Wail Bass Wah Pedal is designed to deliver the expressive feel of classic wah circuits while keeping your low end fully intact. Built around light-sensor technology instead of traditional mechanical pots it eliminates the scratchy noises pops and worn-out components that can plague vintage units. Its solid billet aluminium housing gives it proper road-ready durability while the spring-loaded rocker lets you kick in the effect instantly and keeps your signal clean the moment you step off. Inside the Killer Blue Wail is a specially voiced filter that shifts frequency and adjusts the Q giving every sweep a natural vocal-like character. Unlike guitar-focused wah pedals this one is tailored specifically for bass keeping the low end tight deep and articulate. It reacts smoothly and musically underfoot making it a great tool for shaping groove-based lines adding movement to sustained notes or dropping in dramatic accents. Simple to run on a 9V battery and compact enough for any board the Killer Blue Wail brings classic wah expression to modern bassists without sacrificing the bottom end.
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Price history
Lowest used and new price MyGear saw per day (7 days on record).
| Date | Lowest used | Lowest new | Used listings |
|---|---|---|---|
| 2026-10-28 | €203 | €203 | 1 |
| 2026-10-27 | €203 | €203 | 1 |
| 2026-10-26 | €203 | €203 | 1 |
| 2026-10-25 | €203 | €203 | 1 |
| 2026-10-24 | €203 | €203 | 1 |
| 2026-10-23 | €203 | €203 | 1 |
| 2026-10-22 | €203 | €203 | 1 |








