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| [#1] 挑戰你的音響知識及邏輯 各位發燒友: ![]() |
Krell 219.xxx.xxx.209 |
2021-03-30 22:58 | |
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| [#2] 挑戰你的音響知識及邏輯 Haha why...... Why.... |
hahayanyan 49.xxx.xxx.26 |
2021-03-30 23:10 |
| [#3] 挑戰你的音響知識及邏輯 蕉插鬆到輕聲放個屁都會飛出嚟,有可能係喇叭與後級之間阻抗過高 |
Thanatos 42.xxx.xxx.38 |
2021-03-30 23:13 |
| [#4] 挑戰你的音響知識及邏輯 有錢玩名貴音響,但係連個鬆蕉插都唔識用辦法整緊啲 (例如用工具輕輕撐開蕉瓣),就算冇噪音都唔會好聲 |
Thanatos 42.xxx.xxx.38 |
2021-03-30 23:16 |
| [#5] 挑戰你的音響知識及邏輯 if it is interference.....why wilson have that but not the dyna.........with that cardas whyyyyyyyyyyyyyyyyyyy if it is ground noise..............whyyyyyyyyyyyyyyyyyyyyyy with that cardas whyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy 最後修改時間: 2021-03-30 23:29:06 |
hahayanyan 49.xxx.xxx.26 |
2021-03-30 23:25 |
| [#6] 挑戰你的音響知識及邏輯 剛剛睇咗留言,有人提出都係喇叭插頭太鬆引致阻抗過高,Wilson 與 Dyna 嘅分音氣設計有分別,輸入阻抗、電容及電感數值有所不同,其中Wilson+Gryphon+高阻抗鬆插頭會引致Gryphon 產生oscillation,而Dyna 嘅分音嘅電容電阻電感遇着鬆插頭都唔會引致Gryphon產生oscillation |
Thanatos 42.xxx.xxx.38 |
2021-03-30 23:34 |
| [#7] 挑戰你的音響知識及邏輯 我在想自己去諗 逐步逐步褪諗唔去睇留言 haha Or something is induced... Haha Keen to learn 最後修改時間: 2021-03-30 23:39:50 |
hahayanyan 49.xxx.xxx.26 |
2021-03-30 23:38 |
| [#8] 挑戰你的音響知識及邏輯 依我嘅觀察睇到以下現象: 1. 無論喇叭左定右衹要插在擴音機左聲道先出現噪音(起震)。 2. 插條幼嘅喇叭線冇事反而插條粗嘅就有事。 我個人嘅睇法就係: 1. 無論擴音機有冇接任何loading都唔應該起震,如果話因為蕉插導致接點阻抗變高,噉唔接喇叭阻抗咪應該最高,如果咁都起震嗰部擴音機應該攞去填海。 2. 問題只出現在擴音機左聲道,所以我覺得問題應該出現響擴音機嘅機會比較大。如果呢部係新機噉應該生產程序出現在問題,如果呢部係二手機噉可能根本就已經係有問題。 3. 擴音機嘅設計問題,呢個係最冇可能嘅可能性原因之一。 最後修改時間: 2021-03-31 00:42:02 |
DYreal 119.xxx.xxx.115 |
2021-03-31 00:38 |
| [#9] 挑戰你的音響知識及邏輯 All Gryphon amplifiers are designed and manufactured with an extreme bandwidth and in some cases the wrong choice of speaker cable can become an issue and will create potential problems in the collaboration between the amplifier and the speakers, with the speaker cable as an interactive factor. Gryphon recommends that no speaker cable on a Gryphon amplifier should be with a coaxial design, active shielding or special boxes that will addon different types of filtration. A speaker cable with a coaxial design or with active shielding will in most cases have a much lower bandwidth than the amplifier and therefore the amplifier will be met with a too high capacitive load and might cause oscillation of the amplifier. There is no need to actively add filtration on an analogue amplifier. It doesn’t serve the final reproduction of the music any good. connectors) and aim for low Gryphon recommends using speaker cables with a low capacitance and a wide bandwidth in order to match the specs of the amplifier’s bandwidth and output impedance. There is no need to add more “negative” filtration to the system as Gryphon is striving to have the finest level of tonal balance and neutrality. Choose your cables w ith the highest level of attention to the actual parameters of the cable design (e.g. cable geometry, capacitance, bandwidth, insulation, conductor material and and sonic neutrality. Gryphon Audio Designs February 2019 https://www.google.com/url?sa=t&source=web&rct=j&url=https://gryphon-audio.dk/wp-content/uploads/2020/05/How-to-choose-the-right-cables-for-your-system.pdf&ved=2ahUKEwj_0v-Yu9jvAhUEH3AKHXB1AWgQFjAAegQIBRAC&usg=AOvVaw2xbPQsvbJxTiDtffl1wjI4&cshid=1617122753707 |
audiofans 59.xxx.xxx.170 |
2021-03-31 00:47 |
| [#10] 挑戰你的音響知識及邏輯 the amp is at idle... Does those things what gryphon mentioned also applied in such idle state? 最後修改時間: 2021-03-31 00:53:31 |
hahayanyan 49.xxx.xxx.26 |
2021-03-31 00:53 |
| [#11] 挑戰你的音響知識及邏輯 >>#9 ""... no speaker cable on a Gryphon amplifier should be with a coaxial design..."" ------------------------------------------------------------------------------------------------------------ or google speaker cable twisted vs parallel tinyurl.com/y3c8ryx7 why speaker cable should twisted tinyurl.com/3nnpndbn 最後修改時間: 2021-03-31 06:40:14 |
cornercube 119.xxx.xxx.111 |
2021-03-31 06:27 |
| [#12] 挑戰你的音響知識及邏輯 條片有問題的噪音看來是電源induced的 50/60Hz及其 harmonics, 假設擴音機和其他器材正常,那麽這個 hum/noise 一定是由 mains power supply distribution做成,電力糸統的噪音要深入研究是需要在現場觀察的,以前工作上也遇過幾個差不多的 case, 那是在一個非常高層的單位,頂樓複式豪宅,整座大廈非常高,用電量也非常大,所以供電是用 11kV high riser上樓,並在高層處設有變壓房,是一隻11kV:380v/220v的 1500kVA 變壓器,這個 case的單位正正在這巨大變壓器的樓上,於是乎某些電器本身太靈敏或者冇做 magnet shielding的話,係會 pickup到這個 noise,這個 noise很難處理,因包含了 E-field and H-field, 最後用家的將有問題的器材移位,而在火牛房上方也加設 shielding才勉强解決問題,套片中的喇叭本身也是會 pickup E/H fields的,尤其一些欠缺 h field shield而又將喇叭個金屬框架接地,同時釘腳又再接地,加上如果樓下又有隻大火牛的話,ground loop noise更難解決。 ![]() |
mcc2018 218.xxx.xxx.114 |
2021-03-31 07:55 |
| [#13] 挑戰你的音響知識及邏輯 #6, 8, 9, 12 謝謝高見。單一邊出問題這點不好解釋。 |
Krell 42.xxx.xxx.28 |
2021-03-31 11:19 |
| [#14] 挑戰你的音響知識及邏輯 其實單一邊出問題也是容易解釋的,這現象和 equal potential lines 有關(如下圖示),見片主所有訊號線喇叭線電源線隨地放,而如果那環境又沒有 equal potential grounding mesh的話,不同線將會橫跨不同電壓區域,不同線,不同結構,有些看來有 ferrite ring, pickup有更大分別,可以說有時相距幾寸,已是天淵之別,下圖是某些工業環境的分析圖,在噪音干擾,人身安全,也是需要特別留意的。 ![]() |
mcc2018 218.xxx.xxx.114 |
2021-03-31 11:47 |
| [#15] 挑戰你的音響知識及邏輯 #14 If u at that room... What sort of things.. U may do to troubleshoot.. Etc Such as move the amp. 5 feet forward.. Etc? 最後修改時間: 2021-03-31 12:07:09 |
hahayanyan 49.xxx.xxx.229 |
2021-03-31 12:00 |
| [#16] 挑戰你的音響知識及邏輯 You are right, we need to ensure safe potential across human body in such rooms as shown below; ![]() |
mcc2018 45.xxx.xxx.2 |
2021-03-31 12:09 |
| [#17] 挑戰你的音響知識及邏輯 For domestic and serious audiophile area, a ground mesh with zero potential difference is useful to keep all emi,rfi,esd,as low as possible。 |
mcc2018 45.xxx.xxx.2 |
2021-03-31 12:15 |
| [#18] 挑戰你的音響知識及邏輯 Nice.. I jzut want to ask... 如果有人裝修係咪地下落網穩陣啲 haha 諗起一件陳年舊事1998年 稅務大樓32樓一個電腦機房出現問題.... 好古怪嘅問題 我朋友做嗰間 consultancy公司... 因為當時唔夠人手 就搵咗我去現場慢慢研究所度右度諗到乜就measure 乜.. 咁好玩告假都去 最後搵出問題.... 畀番 computer mainframe佢哋自己去解決 記得嗰個房間起碼有32座 mainframe.. And only 3 of them had that funny issue.. 個結論梗係環境因素啦.... Because it was paid by mainframe computer company.. Haha... 大家都要搵個原因去落枱.. 解決問題 一個禮拜收咗35萬幾.... 如果搵唔到有問題只係可以收100k 我朋友就畀咗十皮嘢我 haha so happy haha 最後修改時間: 2021-03-31 12:31:00 |
hahayanyan 49.xxx.xxx.229 |
2021-03-31 12:22 |
| [#19] 挑戰你的音響知識及邏輯 Yes, some industrial applications including computer room, data centres, as well as audiophile areas are required to install equal potential ground mesh. such as below pic. not cheap, of course....haha ![]() |
mcc2018 45.xxx.xxx.2 |
2021-03-31 12:33 |
| [#20] 挑戰你的音響知識及邏輯 Kind of curious. Is there a confirmed explanation for the problem shown on this youtube? |
BenYC 203.xxx.xxx.178 |
2021-03-31 12:46 |