The QUICKTRACK audio products from Protech Audio are designed to provide professional audio performance in a cost-effective utility package. Each of the new products is designed with features required in most audio applications. The Model MX412 is a dual channel line amplifier. It is designed for impedance and level matching. Both channels have adjustable gain. Inputs and outputs are electronically balanced. Each input and output may be used in either a balanced or unbalanced configuration. Requires low voltage AC power. 4.5" mounting extrusion supplied.