The Protech Audio Model 2012 Automatic Mixer is designed specifically for small venues and rental service. The unit is designed around the patented Dugan Speech System. Much like an experienced console operator, the Dugan algorithm allows turning up the gain on an active channel, while simultaneously attenuating unused channels. By subtracting additional gain from unused channels, the unit reduces echo and redistributes that gain to active channels. This allows greater gain-before-feedback than gated mixers. The Model 2012 adds 2 AUX inputs that are summed to a common signal that is adjustable via a front panel control. The AUX inputs can be switched between automatic and manual mode operation. Engineers at Protech Audio have worked directly with Dan Dugan to develop circuitry that accomplishes his algorithm economically and accurately, bringing transparent automixing to smaller installations.