showstack / glossary / damping-factor
Damping factor 阻尼係數
The load impedance divided by the amplifier’s output impedance, describing how firmly the amplifier resists the voltage a moving loudspeaker cone generates back into it. Cable resistance is in series with the amplifier’s output impedance, so a long or thin speaker run dominates the figure: a couple of tenths of an ohm collapses a quoted factor of several hundred to a few tens.
中文
負載阻抗除以擴大機輸出阻抗，用以描述擴大機抑制喇叭紙盆運動所產生反電動勢的能力。線材電阻 與擴大機輸出阻抗串聯，因此過長或過細的喇叭線會主導這個數字：僅零點幾歐姆便足以令標示數百 的阻尼係數降至數十。
Regional usage
| Where | Term | Note |
|---|---|---|
| UK / US | Damping factor | |
| HK / TW | 阻尼係數 | Usually written on a spec sheet rather than said aloud. |
Easy to get wrong
A damping factor above roughly 50 is a specification rather than a benefit, because the cable has already decided the figure the driver actually experiences.
Sources
- AES standards for audio engineering — Audio Engineering Society primary
Understand the mechanism
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