The Toolbox Series Audio Distribution Amplifiers are designed to provide the system designer, and audio contractor, with a family of high- reliability, cost-effective devices for distributing audio in professional applications. The audio distribution amplifiers are designed for applications requiring that a single audio source be distributed to multiple locations. The Models 5117T is 1 input, 7 output distribution amplifiers. The inputs may be strapped on the dual versions, to create 1 input by 14 output circuits. The "T" versions are transformer isolated on both input and outputs. Each of the 8 models requires only a single rack space. The choice of single or dual units provides extreme circuit density in a minimum of rack space.