Meet the TC Helicon CRITICAL MASS — Studio-Quality Vocal Stompbox for Large Group-Sound Effects. TC Helicon builds tools that put world-class vocal production into the hands of singers and songwriters — intuitive, road-ready and voiced by some of the most respected names in pro audio.

Key Features

• 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

From the rehearsal room to the main stage, the TC Helicon CRITICAL MASS helps your voice cut through with the confidence and polish that TC Helicon is known for.