I noticed my Sound City amp has output transformer taps for 4, 8, and 16 ohms as well as a tap labeled “100V.” Can I use the 100V output as a line output?
The short answer is no. The 100V line setting was intended to be used to drive PA speakers installed in factories, churches, schools, etc.; 100V line speakers have transformers mounted on them to maintain the proper voltage over the long cable runs and multiple speaker installations usually associated with such in-house PA systems. The high transmission voltage minimizes cable losses. This is not a “line out” and should not be connected to mixers, etc., under any circumstances.
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