以下为句子列表：
英文: If the speaker needs more current (its overall impedance drops) then a lower amplifier output impedance will allow that current to be drawn out of the amplifier without causing much of a change in the applied voltage - and that means [i]less[/i] distortio
中文: 如果扬声器需要更大电流（扬声器的整体阻抗降低），那么一个低输出阻抗的放大器可以容许在输出相应电流的同时，所施加的电压变化更小，这也意味着失真更小。
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英文: If the speaker needs more current (its overall impedance drops) then a lower amplifier output impedance will allow that current to be drawn out of the amplifier without causing much of a change in the applied voltage - and that means less distortion.
中文: 如果扬声器需要更大电流（扬声器的整体阻抗降低），那么一个低输出阻抗的放大器可以容许在输出相应电流的同时，所施加的电压变化更小，这也意味着失真更小。
更详细...
英文: It also has a low impedance, which assures that the typical unbalanced output impedance is between 100 and 1000 ohms.
中文: 同时它的低阻抗可以确保典型的非平衡输出阻抗保持在100到1,000欧姆之间。
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英文: One of the things about amplifiers that affects how they can drive a speaker system is the amplifier's output impedance .
中文: 输出阻抗是能够影响放大器如何推动扬声器系统工作的诸多因素之一。
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英文: The formulae for input impedance, output impedance and main magnetic flux are derived. The influence of resistance, induction and voltage ration to output impedance of transformer are discussed.
中文: 摘要导出了变压器输入阻抗、输出阻抗、主磁通的计算公式，讨论了电阻、电感以及变比对变压器输出阻抗的影响。
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