单选题Which of the following is the primary purpose of impedance matched volume control？（）AMaintains proper speaker phaseBProtects the amplifier from damageCProtects the digital systems from damageDAmplifies the speaker signal
单选题
Which of the following is the primary purpose of impedance matched volume control？（）
A
Maintains proper speaker phase
B
Protects the amplifier from damage
C
Protects the digital systems from damage
D
Amplifies the speaker signal
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