Per the brochure: “The FISHER SA-100 is a truly remarkable instrument. It has been equipped with features found only in the costliest of dual-channel amplifiers. With the SA-100, for example, you are free to choose any speaker system you desire. Its advanced circuitry guarantees optimum results with high and low-efficiency speakers. Equipped with the new Center Channel output, the SA-100 permits you to add a third amplifier and speaker system at any time for augmented stereo coverage and realism. There are controls for two-speaker monophonic operation, input level, bias and other adjustments. Exemplifying the great attention paid even to the smallest detail, a FISHER tradition, the SA-100 even has external test point terminals! In its class, it is without equal.”
