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[#7] DIY 喇叭電阻問題    
我想指一个5.6ohm , 另一个可能5.8或5.9ohm 咋

最後修改時間: 2020-04-28 09:20:51
254mm
個人訊息 正式會員
1.xxx.xxx.55
2020-04-28 09:19
[#8] DIY 喇叭電阻問題    
數值誤差可能出自量度儀器,樓主可以試下度多幾次看看係咪都出返相同數值。因為通常度低電阻他錶誤差比較大。
DYreal
個人訊息 會員
119.xxx.xxx.115
2020-04-28 09:25
[#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
個人訊息 會員
218.xxx.xxx.114
2020-04-28 09:34
[#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
個人訊息 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
個人訊息 正式會員
165.xxx.xxx.80
2020-04-28 10:05
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