I tried to purchase a commercially available product as an output transformer to operate a full-range ESL, but I was hesitant because it was expensive.

Please tell me how to design an output transformer that uses a toroidal transformer for power supply and what precautions should be taken.

It may be easy for those who are familiar with electricity. I felt it was difficult to trade off in various aspects.

That's my understanding for now.

As a basic usage, the primary and secondary are reversed from the original usage of the power supply toroidal transformer.

When using a 50VA 230V/6Vx2 transformer for each of the front and rear stators, the calculation is about 1:76.

That's about it.

Are there any common transformer combinations that you can say, "I can't go wrong with this set"?

What are the transformer specifications, usable capacitance, and maximum input?

For full range:

For treble:

For base:

By using 4 or 6 transformers, using the LV side in parallel and the HV side in series, you can boost the voltage even higher. Does the number of transformers increase the corresponding capacitance?

Is the approximate corresponding capacitance determined from the combination of transformers used?

What is the allowable turns ratio? Up to 1:120? What kind of problems will occur if it is exceeded?

Can you calculate the frequency to roll off? Are there any problems with low frequencies?

Can a transformer whose dielectric strength is unknown be used as an output transformer? Are there required safety standards?

It is not the case that the higher the rated power, the better. Is there a standard for selecting the rated power of the transformer?