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The amplifier will have an output impedance of around 0.04 ohms. There will be no 8 ohms. In hi-fi we have always impedance bridging. Zout << Zin.

The damping factor DF = Zin / Zout tells you what Zout is.

Zout = Zin/DF.

If the damping factor DF = 200 and the loudspeaker impedance is Zin = 8 ohms, the output impedance of the amplifier is Zout = 8 / 200 = 0.04 ohms.

You see, there is no "8 ohm amplifier" with a 8 ohm output.

Scroll down to related links and look at "Amplifier, Loudspeaker, and Ohms".

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