Peavey Auto-Match is a 400 watt auto transformer with high-fidelity specifications that lets you convert the output impedance of any direct coupled power amplifier up or down to effectively match the impedance of a particular loudspeaker system. It also has taps to allow use with 70 & 100 volt distribution systems, making it a versatile tool for a variety of sound reinforcement applications.

The Auto-Match is easy to use, with eight screw-type terminals for input and output connections. Two terminals are labeled #1 and the remaining six are labeled #2 through #7. Each terminal is designed to operate at a specific maximum RMS voltage level, with reference to terminal #1, called the “common” terminal. The chart in figure 2 of the user manual can be used to determine the correct terminals for input and output connections based on the amplifier power rating, optimum load impedance, and speaker system impedance.