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---- [讨论]如何将45芯超重低音喇叭做到750W (http://www.nju520.com/bbs/dispbbs.asp?boardid=30&id=12853)
-- 发布时间：2008-4-7 21:56:19
-- [讨论]如何将45芯超重低音喇叭做到750W
| Name | Value | Unit | Comment |
|---|---|---|---|
| Electrical Parameters | |||
| Re | 3.34 | Ohm | electrical voice coil resistance at DC |
| Le | 3.779 | mH | frequency independent part of voice coil inductance |
| L2 | 5.526 | mH | para-inductance of voice coil |
| R2 | 23.19 | Ohm | electrical resistance due to eddy current losses |
| Cmes | 1386.30 | µF | electrical capacitance representing moving mass |
| Lces | 26.66 | mH | electrical inductance representing driver compliance |
| Res | 50.01 | Ohm | resistance due to mechanical losses |
| fs | 26.2 | Hz | driver resonance frequency |
| Mechanical Parameters | |||
| (using laser) | |||
| Mms | 300.105 | g | mechanical mass of driver diaphragm assembly including air load and voice coil |
| Mmd (Sd) | 289.58 | g | mechanical mass of voice coil and diaphragm without air load |
| Rms | 4.329 | kg/s | mechanical resistance of total-driver losses |
| Cms | 0.12 | mm/N | mechanical compliance of driver suspension |
| Kms | 8.12 | N/mm | mechanical stiffness of driver suspension |
| Bl | 14.71 | N/A | force factor (Bl product) |
| Lambda s | 0.130 | suspension creep factor | |
| Loss factors | |||
| Qtp | 0.72 | total Q-factor considering all losses | |
| Qms | 11.40 | mechanical Q-factor of driver in free air considering Rms only | |
| Qes | 0.76 | electrical Q-factor of driver in free air considering Re only | |
| Qts | 0.71 | total Q-factor considering Re and Rms only | |
| Vas | 85.9548 | l | equivalent air volume of suspension |
| n0 | 0.194 | % | reference efficiency (2 pi-radiation using Re) |
| Lm | 85.09 | dB | characteristic sound pressure level |
| rmse Z | 11.80 | % | root-mean-square fitting error of driver impedance Z(f) |
| rmse Hx | 5.06 | % | root-mean-square fitting error of transfer function Hx (f) |
| Series resistor | 0.00 | Ohm | resistance of series resistor |
| Sd | 702.25 | cm | diaphragm area |
| Name | Value | Unit | Comment |
|---|---|---|---|
| HINT : | Reduce Fmax to 20* fs to improve impedance fitting | ||
| U pp | 0.77 | V | peak to peak value of voltage at terminals |
| U ac | 0.10 | V rms | AC part of voltage signal |
| U head | 56.1 | dB | digital headroom of voltage signal |
| U SNR+D | 41.1 | dB | ratio of signal to noise+distortion in voltage signal |
| fu noise | 5.9 | Hz | frequency of noise maximum in voltage signal |
| I pp | 0.08 | A | peak to peak value of current at terminals |
| I ac | 0.01 | A rms | AC part of current signal |
| I head | 63.1 | dB | digital headroom of current signal |
| I SNR+D | 21.9 | dB | ratio of signal to noise+distortion in current signal |
| fi noise | 1631.8 | Hz | frequency of noise maximum in current signal |
| X pp | 0.12 | mm | peak to peak value of displacement signal |
| X ac | 0.02 | mm rms | AC part of displacement signal |
| X head | 64.5 | dB | digital headroom of displacement signal |
| fx cutoff | 90.8 | Hz | frequency of highest valid line in displacement signal |
| p pp | mV | peak to peak value of microphone signal | |
| p ac | mV rms | AC part of microphone signal | |
| p head | dB | digital headroom of microphone signal | |
| p SNR+D | dB | ratio of signal to noise+distortion in microphone signal | |
| fp noise | Hz | frequency of noise maximum in microphone signal | |
| f sample | 6000 | Hz | sample frequency |
| N stim | 8192 | number of samples | stimulus length |
-- 发布时间：2008-4-7 22:01:42
--
如上，请各位兄才讨论一下，在主体结构不变的情况下，怎么将额定功率做到最大---能达到750W。
-- 发布时间：2008-4-7 22:10:23
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喇叭为12寸和10寸，外磁，45芯音圈，华司/T铁板厚10mm,磁铁高69mm。
-- 发布时间：2008-4-7 22:26:23
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45芯做750W，一个字：难。
-- 发布时间：2008-4-7 22:39:16
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用印章盖上“750W”，就可以了。
-- 发布时间：2008-4-8 8:14:24
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PMPO嘛,没问题的.
-- 发布时间：2008-4-8 8:34:44
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不知LZ是用什么软件测出来的TS?
-- 发布时间：2008-4-8 19:47:45
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Klippel测试的
-- 发布时间：2008-4-8 19:56:20
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额定功率实验要通过750W，22小时，问题点主要有：1.音圈断线或散圈2.铝胴体和橡胶边开胶。
待改善：散热，耐温等，还请高手给些经验之谈。
-- 发布时间：2008-4-8 21:26:02
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针对1.音圈断线或散圈：
750W至少用75以上心音圈了。
针对2.铝胴体和橡胶边开胶:
胴體和編最好有先縫合。