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 MX401 has one line input, and four line outputs. The input and three outputs have adjustable gain. All inputs and the output are electronically balanced. The input and all outputs may be used in either a balanced or unbalanced configuration. Requires low voltage AC power. 4.5" mounting extrusion supplied.