Re: use of a transformer?
The transformer allows the installer to connect more than one speaker in parallel to a single output, I've seen up to 20. The trick is the amp must have a 70volt or 25 volt output in order to connect to a speaker with a transformer. You can bypass the transformer, if possible just select 8 ohms or if available 4ohms.
Transformers do not effect the sound reproduction at all. They are designed for comercial use where a stereo signal is not needed. You will normally find this type of speakers in your local hospital, wallmarts and the type you have in a patio at a nice bar & grill, connected to a mono amp.
If you have any ??? pm me as don't frequent this area.
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