請問圖中部後級紅圈個線圈同粒電阻有什麼作用?

THANK YOU!

Output low pass filter, 防止超高頻自激振盪。

會唔會影響音色?

教科書正解(Introduction to Electroacoustics and Audio Amplifier Design, W. Marshall Leach Jr):
"The voice-coil impedance of a loudspeaker driver is not purely resistive. This can have a major perturbation
on the performance of crossover networks...A matching network, sometimes called a Zobel network, between the crossover network and the voice-coil terminals of a driver can be used to cause the effective load on the crossover network to be resistive."

其實Zobel network 重有一隻電容...

Yes, inductor inseries of output, then R+C // to the output terminal.

You can found a cap and resistor locate near of the inductor. (Cap is yellow color)

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