TC Helicon Critical Mass

A simple-to-use vocal stompbox lets you easily create stunning group-sound vocal effects.
Powerful melodic and gang styles give you large group vocals using your voice alone.
No key or scale to set – just sing.
Simple three-knob control gets you up and running in seconds.
High-quality, low-noise mic preamp for pristine vocals.
On/off foot switch for quick performance control

• Rugged, road-worthy construction for years of dependable use
• Designed and engineered in Canada