The TS-1A TESTSET is a great tool for the background music serviceman, the sound technician, the intercom serviceman, the audio serviceman, and all who service or install any type audio equipment.
The TS-1A TESTSET does not take the place of a scope or analyzer. It is a utility test set that is designed for the person on location where it is not feasible to have such elaborate test equipment.
With a little use, you will learn “what sound” and “how much” to expect at certain points. You can tell a lot about an amplifier just by listening to the “ambient noises” of the amplifier.