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| [#1] 分音器技術分析 - 拋磚引玉 分音器技術分析 - 拋磚引玉 在下面有3張PMC TB2分音器圖片 https://upload.review33.com/images/201005/201005311459077174.jpg https://upload.review33.com/images/201005/201005311500464406.jpg https://upload.review33.com/images/201005/201005311501534692.jpg 排列成下面 橫 直 電阻 電感 電容 電容 電阻 電感 這分音設計是不是2nd order設計? 如果是, 電阻目的是什麼? Thanks!  |
cryingfreeman 正式會員218.xxx.xxx.35 |
2010-05-31 15:04 | |
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| [#2] 分音器技術分析 - 拋磚引玉 one more  |
cryingfreeman 正式會員 218.xxx.xxx.35 |
2010-05-31 15:24 |
| [#3] 分音器技術分析 - 拋磚引玉 見你有句Thanks回應下。 你的主旨完全文不對題，首先你並無作任何技術分析，只是貼了幾張相，問了一些初心者問題，你並無拋磚，怎引玉？ |
孟波 正式會員 218.xxx.xxx.240 |
2010-05-31 18:37 |
| [#4] 分音器技術分析 - 拋磚引玉 You photos do not show the whole crossover. Sometimes the HF is second order while the LF is first order. Resistor can be used for level matching, and impedance compensation, as well as frequency response compensation. We do not have the crossover on hand and the circuit details, so no comment. 最後修改時間: 2010-05-31 19:20:36 |
38super 正式會員 220.xxx.xxx.39 |
2010-05-31 19:19 |
| [#5] 分音器技術分析 - 拋磚引玉 something wrong about the penpower 孟波 an 38 super hing yes, you are right, there is neither technical analysis or tehcnical article and just a photo show only i just try to make a topics for people not just focus on the political issue in R33! ok? just let people create interest and bond together! |
cryingfreeman 正式會員 119.xxx.xxx.148 |
2010-05-31 19:53 |
| [#6] 分音器技術分析 - 拋磚引玉 Sometimes the HF is second order while the LF is first order. ________________________________________________ 應該吾係甘解!! 同埋光看這些圖, 應該無可能看得出係咩設計..........有無SCH?? |
kerds 正式會員 218.xxx.xxx.144 |
2010-06-01 00:12 |
| [#7] 分音器技術分析 - 拋磚引玉 What I meant was sometimes some speakers are designed to have ASYMMETRICAL FILTER SLOPES. There is no LAW that tells us the woofer's slope has to be the same as the tweeter or midrange. Do you ever heard that there are speakers having NO CROSSOVER components for the WOOFER? The woofer can be connected to the power amplifier directly, while the tweeter have capacitor, inductor and resistor network for filtering. This happened in my father's Sansui SuperCompo 12" 3-Way Sansui Speaker in 1981, my first step to HiFi (or Lo Fi) It was this HiFi system that poisoned me and I entered a local University to learn electronics - just wanted to learn more about HiFi, but I finally found that local electronic engineering course does not have much HiFi related topics, haha. |
38SUPER 正式會員 219.xxx.xxx.144 |
2010-06-01 01:26 |
| [#8] 分音器技術分析 - 拋磚引玉 分音頻率節數最重要係考慮單體本身嘰輸出, 有D低音喇叭單體本身震膜設計配合防塵蓋已經可以包含高頻嘰cut-off又或者本身震膜分裂所產生嘰自然roll-off, 當中變數亦包含震膜嘰弧度,直徑,形狀同深度等等, 有時設計者係要o係sensitivity同bandwidth之間作出取捨, 高音單體實際應用設計上做唔到亦唔適合做acoustic high pass.... 最後修改時間: 2010-06-01 02:05:38 |
長長影子 正式會員 59.xxx.xxx.41 |
2010-06-01 02:03 |
| [#9] 分音器技術分析 - 拋磚引玉 樓主，有那麼多珠玉引出來，滿載而歸啦。 |
孟波 正式會員 218.xxx.xxx.240 |
2010-06-01 21:46 |
| [#10] 分音器技術分析 - 拋磚引玉 樓主，有那麼多珠玉引出來，滿載而歸啦。 I consider all members here should get the benefit from other people's contribution |
cryingfreeman 正式會員 218.xxx.xxx.35 |
2010-06-02 10:09 |
| [#11] 分音器技術分析 - 拋磚引玉 Have a look here. This is some new concept about digital crossover http://www.acourate.com/XOWhitePaper.pdf |
ackcheng 正式會員 112.xxx.xxx.19 |
2010-06-02 20:12 |
| [#12] 分音器技術分析 - 拋磚引玉 I found some information for sharing purpose Second order filters (12dB/octave) are better at keeping unwanted frequencies out of the individual speakers, but are more complex, and are affected by impedance variations to a much greater degree. The tolerance of the components used will also have a greater effect, so it is not uncommon for designers to make the inductors specifically for the job, rather than attempting to use "off the shelf" coils. The capacitance used must also remain predictable and constant over time and power, which specifically excludes the use of bipolar electrolytics (well apart from any other failings they may have - either real or imagined). The design task becomes more complex and the tolerances more exacting as the order is increased. A third order (18dB/octave) filter requires closer tolerances than a second order, and is again even more susceptible to any impedance variations than the 12dB filter. Fourth order (24dB/octave) increases the complexity and tolerance requirements even further - a point must be reached where the requirements versus the complexity and sensitivity will balance out. With passive crossovers, I now believe that anything over 12dB is a waste of time, especially when the effects of voice coil temperature are considered. Even with the second order filter, the possible variations (especially those caused by voice coil temperature) can totally ruin the sound - regardless of the quality of the components or care in making the crossover. I shall leave it to the reader to determine for him/her self where to draw the line. |
cryingfreeman 正式會員 218.xxx.xxx.35 |
2010-06-11 16:05 |
| [#13] 分音器技術分析 - 拋磚引玉 That why 2nd order 2 way spr need reverse....as i remember in JBL fan club some jbl in 3 way also reverse in bandpass and 4425 is a 2way spekaer which is also revsered! .... Second order filters have an overall phase reversal, and this must be accounted for. In a two-way system, the tweeter is usually connected out of phase - the negative terminal is connected to the "positive" or hot output of the filter network. In the case of a three way system, the midrange driver is most commonly reversed in phase, with the woofer and tweeter connected normally. This maintains the overall phase integrity of the crossover for all drivers. A deep notch is created at the crossover frequency if the phase reversal(s) is/are not done properly - this is objectionably audible! |
cryingfreeman 正式會員 218.xxx.xxx.35 |
2010-06-11 16:08 |
| [#14] 分音器技術分析 - 拋磚引玉 Happy sharing! 之前有c-hing介紹過o既網站有關分音器技術分析係唔錯.. ..如下..網頁內 Calculators. .. http://www.diyaudioandvideo.com/FAQ/XOver/ http://www.lalena.com/Audio/Calculator/APCXOver/ http://www.diyaudioandvideo.com/Calculator/SeriesNotch/Help.aspx ^_^ |
PLL 正式會員 218.xxx.xxx.11 |
2010-06-12 13:44 |
| [#15] 分音器技術分析 - 拋磚引玉 難玩 |
tingmoon 會員 219.xxx.xxx.143 |
2024-12-13 12:33 |
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