The TOA Amplifier Guide is a sound system design tool aimed at helping system designers, sales staff, installers and end users select the right amplifiers and accessories for their applications. It includes a review of the basic concepts of audio amplification, such as signal flow, levels, and impedance, plus useful references such as thermal dissipation, power consumption and line loss charts, as well as tips for troubleshooting (including impedance measurement).

Disclaimer: This design guide does not cover all of the general concepts underlying sound system design and installation, which would require several hundred pages. This guide is not meant to replace the participation of an experienced consultant or engineer.