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标题：来看看这个2寸低音单元
1楼
wsf912 发表于：2007-5-12 8:58:39 来看看这个2寸低音单元,用于开口箱,各位高手给点意见吧.
| Name | Value | Unit | Comment |
|---|---|---|---|
| Electrical Parameters | |||
| Re | 7.35 | Ohm | electrical voice coil resistance at DC |
| Le | 0.297 | mH | frequency independent part of voice coil inductance |
| L2 | 0.135 | mH | para-inductance of voice coil |
| R2 | 1.00 | Ohm | electrical resistance due to eddy current losses |
| Cmes | 104.65 | µF | electrical capacitance representing moving mass |
| Lces | 25.17 | mH | electrical inductance representing driver compliance |
| Res | 29.09 | Ohm | resistance due to mechanical losses |
| fs | 98.1 | Hz | driver resonance frequency |
| Mechanical Parameters | |||
| (using laser) | |||
| Mms | 2.142 | g | mechanical mass of driver diaphragm assembly including air load and voice coil |
| Mmd (Sd) | 2.117 | g | mechanical mass of voice coil and diaphragm without air load |
| Rms | 0.704 | kg/s | mechanical resistance of total-driver losses |
| Cms | 1.230 | mm/N | mechanical compliance of driver suspension |
| Kms | 0.81 | N/mm | mechanical stiffness of driver suspension |
| Bl | 4.52 | N/A | force factor (Bl product) |
| Lambda s | 0.136 | suspension creep factor | |
| Loss factors | |||
| Qtp | 0.379 | total Q-factor considering all losses | |
| Qms | 1.875 | mechanical Q-factor of driver in free air considering Rms only | |
| Qes | 0.474 | electrical Q-factor of driver in free air considering Re only | |
| Qts | 0.378 | total Q-factor considering Re and Rms only | |
| Vas | 0.2750 | l | equivalent air volume of suspension |
| n0 | 0.053 | % | reference efficiency (2 pi-radiation using Re) |
| Lm | 79.41 | dB | characteristic sound pressure level (SPL at 1m for 1W @ Re) |
| Lnom | 79.78 | dB | nominal sensitivity (SPL at 1m for 1W @ Zn) |
| rmse Z | 4.62 | % | root-mean-square fitting error of driver impedance Z(f) |
| rmse Hx | 3.36 | % | root-mean-square fitting error of transfer function Hx (f) |
| Series resistor | 0.00 | Ohm | resistance of series resistor |
| Sd | 12.57 | cm | diaphragm area |
2楼
wsf912 发表于：2007-5-23 18:00:43我的2寸低音做的这么辛苦,没人支持一下吗?
3楼
lihailan456 发表于：2007-5-23 20:29:30不懂
4楼
spk888 发表于：2007-5-28 10:18:16以下是引用wsf912在2007-05-12 08:58:39的发言：
有些参数很让人吃惊,低Q低FS 对小单元来说没什么实际的意义,要是贴上曲线,能更好的品味一下! 来看看这个2寸低音单元,用于开口箱,各位高手给点意见吧.
| Name | Value | Unit | Comment |
|---|---|---|---|
| Electrical Parameters | |||
| Re | 7.35 | Ohm | electrical voice coil resistance at DC |
| Le | 0.297 | mH | frequency independent part of voice coil inductance |
| L2 | 0.135 | mH | para-inductance of voice coil |
| R2 | 1.00 | Ohm | electrical resistance due to eddy current losses |
| Cmes | 104.65 | µF | electrical capacitance representing moving mass |
| Lces | 25.17 | mH | electrical inductance representing driver compliance |
| Res | 29.09 | Ohm | resistance due to mechanical losses |
| fs | 98.1 | Hz | driver resonance frequency |
| Mechanical Parameters | |||
| (using laser) | |||
| Mms | 2.142 | g | mechanical mass of driver diaphragm assembly including air load and voice coil |
| Mmd (Sd) | 2.117 | g | mechanical mass of voice coil and diaphragm without air load |
| Rms | 0.704 | kg/s | mechanical resistance of total-driver losses |
| Cms | 1.230 | mm/N | mechanical compliance of driver suspension |
| Kms | 0.81 | N/mm | mechanical stiffness of driver suspension |
| Bl | 4.52 | N/A | force factor (Bl product) |
| Lambda s | 0.136 | suspension creep factor | |
| Loss factors | |||
| Qtp | 0.379 | total Q-factor considering all losses | |
| Qms | 1.875 | mechanical Q-factor of driver in free air considering Rms only | |
| Qes | 0.474 | electrical Q-factor of driver in free air considering Re only | |
| Qts | 0.378 | total Q-factor considering Re and Rms only | |
| Vas | 0.2750 | l | equivalent air volume of suspension |
| n0 | 0.053 | % | reference efficiency (2 pi-radiation using Re) |
| Lm | 79.41 | dB | characteristic sound pressure level (SPL at 1m for 1W @ Re) |
| Lnom | 79.78 | dB | nominal sensitivity (SPL at 1m for 1W @ Zn) |
| rmse Z | 4.62 | % | root-mean-square fitting error of driver impedance Z(f) |
| rmse Hx | 3.36 | % | root-mean-square fitting error of transfer function Hx (f) |
| Series resistor | 0.00 | Ohm | resistance of series resistor |
| Sd | 12.57 | cm | diaphragm area |
5楼
glaive 发表于：2007-5-28 11:04:04内磁大音圈的做法.方向应该是这样的.找客人要个样品回来就容易解决了
6楼
glaive 发表于：2007-5-28 11:06:01有点不对劲.灵敏度要求那么低
7楼
ldb202020 发表于：2007-5-28 19:01:542寸低音"FS98.1是太低了,灵敏度也低了!为什么这么设计???
8楼
wsf912 发表于：2007-5-28 19:13:47| 下载信息 [文件大小： 下载次数： ] | |
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曲线
9楼
jma 发表于：2007-5-28 21:47:07这２寸的喇叭也不怎么滴呀，，看实际的曲线ＦＳ好象没有９８ＨＺ哦，，
10楼
wsf912 发表于：2007-5-29 15:15:45我有fs=80多的样品,也有100多的,曲线我随便传了一张,低fs是客户要求的.