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| [#9] DIY 喇叭電阻問題 仲要量度的時候，唔好用手㩒㩒下個喇叭振盆。 |
mcc2018 會員218.xxx.xxx.114 |
2020-04-28 09:34 | |
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| [#10] DIY 喇叭電阻問題 Re Measured in ohms (Ω), this is the DC resistance (DCR) of the voice coil, best measured with the cone blocked, or prevented from moving or vibrating because otherwise the pickup of ambient sounds can cause the measurement to be unreliable. Re should not be confused with the rated driver impedance, Re can be tightly controlled by the manufacturer, while rated impedance values are often approximate at best. American EIA standard RS-299A specifies that Re (or DCR) should be at least 80% of the rated driver impedance, so an 8-ohm rated driver should have a DC resistance of at least 6.4 ohms, and a 4-ohm unit should measure 3.2 ohms minimum. This standard is voluntary, and many 8 ohm drivers have resistances of ~5.5 ohms, and proportionally lower for lower rated impedances. https://en.wikipedia.org/wiki/Thiele/Small_parameters |
長長影子 正式會員 165.xxx.xxx.80 |
2020-04-28 09:56 |
| [#11] DIY 喇叭電阻問題 跟據以往經驗，大廠喇叭 driver 出貨 DCR tolerance 大概+/-5%，普通大概+/-10%。 |
長長影子 正式會員 165.xxx.xxx.80 |
2020-04-28 10:05 |
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