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| [#53] 喇叭原理分享篇(高中音偏軸設計) 小狗你啦！ 收皮啦！ 骨妹都收晒經喇！ |
CodyChan 會員119.xxx.xxx.157 |
2024-07-22 19:36 | |
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| [#52] 喇叭原理分享篇(高中音偏軸設計) Ologe抵玩 |
tingmoon 會員 218.xxx.xxx.194 |
2024-07-22 19:24 |
| [#51] 喇叭原理分享篇(高中音偏軸設計) good thread x2 多謝孟波& kslsfz兄分享見解和討論 |
george1977 正式會員 203.xxx.xxx.1 |
2012-01-05 13:50 |
| [#50] 喇叭原理分享篇(高中音偏軸設計) 孟波兄你好啊！近排玩緊乜？ 你既資料好強！ 你覺得我而家玩緊厘個Ologe係點？^_^  |
Go4WAR 正式會員 116.xxx.xxx.166 |
2012-01-05 13:20 |
| [#49] 喇叭原理分享篇(高中音偏軸設計) 小弟正考慮 ATC SCM50 如何攞位；竟有孟波兄這寶貴資料幫助。 謝謝 |
mr1010 正式會員 61.xxx.xxx.18 |
2012-01-05 09:17 |
| [#48] 喇叭原理分享篇(高中音偏軸設計) haha.. i am reading the cookbook 7th edition. compare to the 6th edition , 7th edition is much easier to read for newbie..haha withi the cookbook "interlock兄： 唔會，反而氣管工作頻率的聲音量感會減少，但又未必唔好聲，有種叫阻尼低音反射式既喇叭，就係故意用半透聲物質加在氣管中控制其聲音輻射強度。" there are a chapter for explaining those Vents, some approaches was suggest on how to tune the Vent and measurements.. very good 最後修改時間: 2011-12-27 13:12:11 |
hahayanyan 正式會員 116.xxx.xxx.8 |
2011-12-27 13:09 |
| [#47] 喇叭原理分享篇(高中音偏軸設計) 各路師兄, 祝聖旦快樂, 新年進步, 器材升級!!!  |
16575 正式會員 61.xxx.xxx.182 |
2011-12-23 23:57 |
| [#46] 喇叭原理分享篇(高中音偏軸設計) good information |
hahayanyan 正式會員 202.xxx.xxx.204 |
2011-12-16 16:06 |
| [#45] 喇叭原理分享篇(高中音偏軸設計) interlock兄： 唔會，反而氣管工作頻率的聲音量感會減少，但又未必唔好聲，有種叫阻尼低音反射式既喇叭，就係故意用半透聲物質加在氣管中控制其聲音輻射強度。  |
孟波 正式會員 123.xxx.xxx.186 |
2011-12-12 20:22 |
| [#44] 喇叭原理分享篇(高中音偏軸設計) 孟波兄, 問多少少資料. 如前氣孔用雜布加以阻塞,是否會加強低頻? thanks. |
interlock 正式會員 202.xxx.xxx.254 |
2011-12-12 12:11 |
| [#43] 喇叭原理分享篇(高中音偏軸設計) 孟波兄, thanks. |
interlock 正式會員 202.xxx.xxx.254 |
2011-12-10 12:33 |
| [#42] 喇叭原理分享篇(高中音偏軸設計) interlock兄： 分別傾向正常，你覺得聲音平衡遜於舊擺位係因為你係根據此校聲，如果你以高中音向上校好聲，再掉番轉時你又會覺得分析力差左了。 |
孟波 正式會員 123.xxx.xxx.186 |
2011-12-09 19:48 |
| [#41] 喇叭原理分享篇(高中音偏軸設計) 對於如JBL 4311這類非鏡頭對稱安裝單元的喇叭，很多朋友話定位會歪埋一邊。 老實說，個人聽唔出歪埋一邊，有些玩4311的朋友照舊將高/中音單元放在低音下面但又放在普通高度腳架上，其實有違4311的單元安排原意，4311係設計掛在高位作鑑聽用途，由於高/中單元的擴散度關係，將高中音放在底下更接近聆聽者，聲音才正常。如果用在普通腳架高度，高中音應該放上面。 ................................................. 孟波兄, 我是4311用家,按你意見掉轉放,有以下分別,請指教. (1)掉轉放 : 高頻及分析好咗,但低頻少咗,聲音較單簿. (2)原裝位放 : 低頻豐滿而高頻及分析比掉轉放略遜, 但整體平衡較好. 以上為本人用胆機推之個人意見,敬希指教. 謝. |
interlock 正式會員 202.xxx.xxx.254 |
2011-12-09 14:27 |
| [#40] 喇叭原理分享篇(高中音偏軸設計) a bit off topics..but it is good information http://www.humblehomemadehifi.com/Cap.html |
hahayanyan 正式會員 202.xxx.xxx.93 |
2011-12-07 14:36 |
| [#39] 喇叭原理分享篇(高中音偏軸設計) i have 6th edition.,..nice book |
hahayanyan 正式會員 202.xxx.xxx.18 |
2011-12-05 13:53 |
| [#38] 喇叭原理分享篇(高中音偏軸設計) 孟波兄及diytfy兄 Thank you for your reply Got the Speaker cookbook Tons of material to digest especially Chapter 6, & 7!! |
kslsfz 正式會員 74.xxx.xxx.93 |
2011-12-05 03:05 |
| [#37] 喇叭原理分享篇(高中音偏軸設計) "One of the advantages of (高中音偏軸設計) is the compensation of path difference. If this is the idea behind the design, the tweeter should be placed further away" The how "further away" depends on 1) XO point/wavelengh 2) sum relation of number of orders (e.g. 1st , 2nd order..etc) in LP and HP 3) natural phase shift of individual drivers due to 2) , it's not odd we see manfacturor place high or mid driver "inner" to the woofer. |
diytfy 正式會員 124.xxx.xxx.189 |
2011-12-04 13:23 |
| [#36] 喇叭原理分享篇(高中音偏軸設計) "Btw, is this compensation distance kept constant throughout the history of Tannoy (Black,Silver,Red,Gold....etc)?" a response to lslsfz c-hihg, The 12" (1.7kHz XO) and the 15"(1.1kHz) vintage alnico drivers you mentioned , the treble VC and the bass VC distances are repectively constant per their XO points. Thus a bigger and deeper magnet for the 15" unit. Some later ceramic models have less depth magnet may need extra LC circuits to compensate the phase shift, but this is not desirable as the resolution and overall quality might be demaged by that extra LC circuits. To reduce phase shift accurately, both Placement of the VC ( 偏軸 ) or Extra component in the passive XO can do the job. The difficulties and listening results have a very big area of knowledge and experience behind. |
diytfy 正式會員 124.xxx.xxx.189 |
2011-12-04 13:11 |
| [#35] 喇叭原理分享篇(高中音偏軸設計) According to them, it has to do with the height of measurement/listening which requires the time alignment. Moving along the vertical axis will cause different phase delay from the drivers. This is significant when the listening position is near field. For normal far field listening, I doubt it's that crucial. And if what they say is true, they should provide a recommended listening distance for that to apply. ********************************************* kslsfz兄： 你說得對，以簡單的兩路分音設計作例子，高音和低音在summing時的平直響應範圍，只出現在特定的聲軸上面，如果聆聽者改變了高度，分頻交接範圍會出現兩單元距離差造成相位抵銷響應凹陷的現象，即所謂葉形效應。odd order 和even order的葉形效應也會不同，speaker design cookbook內有圖文解說。 Tannoy的同軸設計解決了這問題。 最後修改時間: 2011-12-04 01:05:22 |
孟波 正式會員 123.xxx.xxx.186 |
2011-12-04 01:02 |
| [#34] 喇叭原理分享篇(高中音偏軸設計) 孟波 hing, My knowledge in 喇叭 is very limited. It takes a lot of physical effort, $$ and determination to 'play' with 喇叭 in HK Inspired by this thread I spent some time googling time alignment. This B&W brochure mentions the way they align their drivers according to the phase characteristics of the drivers in the crossover section http://www.bwspeakers.com/downloadFile%5CtechnicalFeature%5C800_Development_Paper.pdf According to them, it has to do with the height of measurement/listening which requires the time alignment. Moving along the vertical axis will cause different phase delay from the drivers. This is significant when the listening position is near field. For normal far field listening, I doubt it's that crucial. And if what they say is true, they should provide a recommended listening distance for that to apply. This long article here explains the pros and cons of time alignment, group delay... but it takes some effort to digest http://sound.westhost.com/ptd.htm |
kslsfz 正式會員 74.xxx.xxx.93 |
2011-12-03 23:22 |
