An audio transformer is required to match an amplifier of output resistance of 300 Ω to a speaker of 16 Ω.
Calculate the optimum turns ratio and briefly explain the concept of maximum power transfer.
Explain the reasons why the efficiency of a large power transformer is different from that for a small transformer.© BrainMass Inc. brainmass.com October 10, 2019, 8:32 am ad1c9bdddf
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The maximum power transfer can be achieved when the load resistance is equal the output resistance of the amplifier. Using a transformer, the 16Ω resistor can be transformed to 300Ω using the transformer. The optimum turns ratio needed can be computed using the formula:
(Ns/Np)2 = Rp/Rs
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