Refugee wrote:They are just an ordinary transformer.
Refugee wrote:One with 2X 110V on the primary and the same voltage at the mains transformer in the amp on the secondary should do.
Crackle wrote:You can often find 100v line OP transistor amps of 100w output for a few quid at bootsales.
They dont often go for much money as they ... are usually mono anyway.
Example: A 100W PA speaker (100V line type) should present 100 ohms load to the PA amp. R= V^2/W.
To use this speaker with a standard 8 ohm output audio amp, the matching transformer will have to match 8 ohms at the amp to 100 ohms for the speaker and be rated at a lot more than 100W. Impedance ratio about 12:1
Herald1360 wrote:A mains tx with 110v primary and a 30v secondary could be used backwards for low Fi results- probably OK for PA speech announcements.
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