CRITICAL MASS - Studio-Quality Vocal Stompbox for Large Group-Sound Effects 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 3-Year Warranty Program* Designed and engineered in Canada

• 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