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 MX403 has three line inputs, mixed to a common signal, and distributed to two line outputs. Each input and one output has adjustable gain. All inputs and the output 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.