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| [#101] 分享一篇文章-------揚聲器的效率、阻抗與動態 劉仔兄： 你見佢來來去去都係提住我打錯個r字，又捉字蚤又玩斷詞取義，將相位曲線既相位，曲線分開黎講，又好意思話自己係度講technical，一問佢technical野就左閃右避，明眼人一睇都見。 老實講，我相信佢寧願認係縮頭烏龜都唔認自己唔知條相位曲線代表乜。 |
孟波 正式會員218.xxx.xxx.240 |
2011-07-10 21:01 | |
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| [#102] 分享一篇文章-------揚聲器的效率、阻抗與動態 your original post: """相位曲線也是影響喇叭好唔好推的重要因素""" please explain: 1) how can a curve affect speaker好唔好推? curve or graph is a measurement tool showing the results of measurements. 2)how can 相位 affect speaker 好唔好推??? can u quote any source? i really dont understand what u are talking about cpu8088 會員 115.xxx.xxx.214 2011-07-06 19:15 ************************************************* 縮頭烏龜既所謂discussion就係咁款， 先將我原本的 "除了阻抗曲線，相位曲線也是影響喇叭好唔好推的重要因素"刪了(除了阻抗曲線)這段， 再將相位曲線這詞先分拆為曲線，然後相位，當係兩樣野，分別問我點解影響(好唔好推)。 斷章取義和犁橫折曲一氣呵成，呢d咁既下三流技倆係呢種人先做得出。 難怪你阿叔兄話cpu8088 "佢嘅出現只不過捉吓人字蚤，就會好開心。" 此人確係低庄！  最後修改時間: 2011-07-10 22:49:06 |
孟波 正式會員 218.xxx.xxx.240 |
2011-07-10 22:33 |
| [#103] 分享一篇文章-------揚聲器的效率、阻抗與動態 捉字蚤 變成 捉蟲入C忽 一個經典例子   最後修改時間: 2011-07-10 23:02:44 |
MDLP 正式會員 219.xxx.xxx.78 |
2011-07-10 23:02 |
| [#104] 分享一篇文章-------揚聲器的效率、阻抗與動態 23:00又夠鐘。 縮頭烏龜呢d斷詞取義就係你所謂既pointed out啦？ 咁你今晚記住同你老婆話：妳又"老"；又成個阿"婆"咁喎。KaKa.... ＞＞＞捉字蚤 變成 捉蟲入C忽 一個經典例子＞＞＞＞ 哎佢成日話我呃人，如果我呃人咁叻我就呃佢去賣屎忽，到時咪賣屎忽有蟲送？KaKa.... 最後修改時間: 2011-07-10 23:11:36 |
孟波 正式會員 218.xxx.xxx.240 |
2011-07-10 23:05 |
| [#105] 分享一篇文章-------揚聲器的效率、阻抗與動態 我覺得單單睇咁嘰阻抗曲線點好多盲點, 高中低連分音器都合埋一齊, 有D分音器設計上仲會加返阻抗修正電路, 全部real同imaginary part 又抄埋一碟, 但據了解最高阻抗時並唔一定係amp最難推嘰地方, 雖然real img變化劇烈, 但其實果點反而係喇叭本身物理上係最高效率嘰一點, 阻抗高係因為線圏切割磁力線時產生back emf = Bl v (v = voice coil嘰particle velocity) 同輸入電壓對抗令電流流入變細, 物理上亦非電路上所表達嘰電容性咁單純, 至於對AMP黎講好唔好推仲有多多因素, 整體對傳統或D類嘰影響狀況又唔同晒, 我相信唔係三言兩語可以解釋得清楚.. |
長長影子 正式會員 124.xxx.xxx.67 |
2011-07-10 23:19 |
| [#106] 分享一篇文章-------揚聲器的效率、阻抗與動態 這過期處理器並不在乎技術討論，只經常以此作幌子挑釁別人，撩事鬥非，你同佢講乜佢根本唔會明。 或者你試下，睇下佢識唔識回應你。 |
孟波 正式會員 218.xxx.xxx.240 |
2011-07-10 23:30 |
| [#107] 分享一篇文章-------揚聲器的效率、阻抗與動態 最搞笑嘅連自已 up 果d都唔敢答，唔識仲周圍亂咁吹老點人。 |
你阿叔 正式會員 183.xxx.xxx.93 |
2011-07-10 23:35 |
| [#108] 分享一篇文章-------揚聲器的效率、阻抗與動態 何必浪費生命, 不如花effort探求事實真相比較有意義.. 一個題外話, 共振峰喱一點內裡嘰各種現象真係非常之複雜, 我夠膽講就算搵一個好資深嘰喇叭設計工程師都唔能夠解釋到, 如果喇叭磁路上對外有offset, 當輸入訊號頻率落響共振峰時會消失,但過左共振峰會變成反方向嘰offset直至最大offset unstable後先返轉頭, 單單係喱一點我相信響香港能夠解釋到嘰人十隻手指數得晒, 我自己果時聽完好似明又好似唔明, 要解釋我都唔能夠解釋清楚.....  |
長長影子 正式會員 124.xxx.xxx.67 |
2011-07-10 23:47 |
| [#109] 分享一篇文章-------揚聲器的效率、阻抗與動態 影子兄： 不如先集中說回這圖，阻抗曲線表達是ohm，相位曲線表達的是電氣相位角，正數時呈電感性，負數時呈電容性。 這過期處理器不肯回答我問佢條相位曲線代表乜的原因，恐怕是最初當它是時間相位，所以說"does phase shifts affect voltage? current? resistance? or what?"可能後來上網搵到料，就左閃右避不肯回應我的問題，因為佢話我說"除了阻抗曲線，相位曲線也是影響喇叭好唔好推的重要因素。"係呃人既。 最後修改時間: 2011-07-11 00:08:20 |
孟波 正式會員 218.xxx.xxx.240 |
2011-07-10 23:59 |
| [#110] 分享一篇文章-------揚聲器的效率、阻抗與動態 From Wiki: Impedance Phase AngleImpedance variations of the load with frequency translate into variation in the phase relationship between the amplifier's voltage and current outputs. For a resistive load, usually (but not always) the voltage across the amplifier's output devices is maximum when the load current is minimum (and the voltage is minimum across the load) and vice-versa, and as a result the power dissipation in those devices is least. But due to the complex and variable nature of the driver/crossover load and its effect on the phase relationship between the voltage and current, the current will not necessarily be at its minimum when the voltage across the output devices is maximum - this results in increased power dissipation in the amplifier output stage which manifests as heating in the output devices. The phase angle varies most near resonance in moving coil loudspeakers. If this point is not taken into consideration during the amplifier design, the amplifier may overheat causing it to shut down, or cause failure of the output devices. See Power factor for more detail. 隨時搵到。 http://en.wikipedia.org/wiki/Electrical_characteristics_of_dynamic_loudspeakers#Impedance_Phase_Angle |
孟波 正式會員 218.xxx.xxx.240 |
2011-07-11 00:06 |
| [#111] 分享一篇文章-------揚聲器的效率、阻抗與動態 過期處理器， 你話"big swings in phasing means the speaker is poorly designed." 呢對係咪例子？ Focal Electra 1037 Be loudspeaker Measurements Sidebar 3: Measurements The Focal Electra 1037 Be was significantly more sensitive than normal at an estimated 90dB(B)/2.83V/m. However, its plot of impedance magnitude and electrical phase (fig.1) indicates that it is a demanding load for the partnering amplifier in the lower midrange and bass. Not only is there a minimum value of 3 ohms at 33Hz, but there is a combination of 4.25 ohms and –47.5° capacitive phase angle at 27.3Hz. Fortunately, music with significant energy below 40Hz is relatively rare, but an amplifier that has no trouble driving 4 ohm loads at high levels will still be required. The fact that the impedance remains above 10 ohms for much of the treble means that the 1037 Be will tend to sound shelved-up in the highs with tube amplification.  |
孟波 正式會員 218.xxx.xxx.240 |
2011-07-11 00:16 |
| [#112] 分享一篇文章-------揚聲器的效率、阻抗與動態 ＞＞＞何必浪費生命, 不如花effort探求事實真相比較有意義..＞＞ 同意，如果真係為探求事實真相當然有意義。 可惜這cpu8088每次出現都係態度輕挑，出言不遜，我講一句說話這人就無限上綱，目的不在乎探求事實，只在乎撩事鬥非。 我插這人都插得好有意義。 |
孟波 正式會員 218.xxx.xxx.240 |
2011-07-11 00:30 |
| [#113] 分享一篇文章-------揚聲器的效率、阻抗與動態 man ball your post #110 quote from wiki is related to amplifier. not speakers. re your focal it has not indicated how the phase plot affect speakers easy or hard to drive. it just talk about impedance swings. forget about the minimum impedance, just look at the graphs of the b and w phase plot and that of focal of which the b and w has bigger swings can one say that b and w has bigger swings is harder or easier to drive meaning the phase swings is a factor? |
cpu8088 正式會員 115.xxx.xxx.214 |
2011-07-11 07:46 |
| [#114] 分享一篇文章-------揚聲器的效率、阻抗與動態 cpu appreciate sound or sound effect from speakers by the brand name, anything non-Focal has to be flawed, have you all noticed that. He only believed from the chart that is Focal has to be better than anything in the world and he dreams all day about how his future ownership of the Focal speakers how they should sound. Sometimes, I wonder how would he feels if his Focal does not deliver the sound he has expected. Ka Ka Ka!!! |
NAR 正式會員 219.xxx.xxx.38 |
2011-07-12 00:04 |
| [#115] 分享一篇文章-------揚聲器的效率、阻抗與動態 最後修改時間: 2011-07-12 00:05:28 |
NAR 正式會員 219.xxx.xxx.38 |
2011-07-12 00:04 |
| [#116] 分享一篇文章-------揚聲器的效率、阻抗與動態 公道自在人心,有必要爭一日之長短嗎? |
長長影子 正式會員 124.xxx.xxx.67 |
2011-07-12 00:45 |
| [#117] 分享一篇文章-------揚聲器的效率、阻抗與動態 Ls35a效率低，但300B, 2A3都可以玩得好掂 |
aheung 會員 219.xxx.xxx.5 |
2019-09-17 09:25 |
