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本帖最后由 香山佬 于 2021-1-18 12:37 编辑
建议看看 D‘Appolito 大师的2002年经典传输线 THOR。
http://www.madisound.com/loudspe ... 20Thor%20Review.pdf
或
https://audioxpress.com/article/ ... o-transmission-line
二千刀套件还有卖。
https://www.madisoundspeakerstor ... /new-thor-kit-pair/
传输线比较适合追求高保真中低音不糊的烧友,习惯塞住倒相孔消灭谐振音染,同时不放弃下潜深而清晰,结实又弹跳的低音。根据我的阅读和一点点经验,传输线容错性不低,很可以DIY。一个很直接的优势是箱体多了些“筋”各种音染都降低了,我那100块的小箱子都能用(当倒相箱就不行)。不过得注意,通称“传输线”有许多种,所谓 TQWT/TQWP(tapered quarter wave tube/pipe 管从小变大)不是经典传输线(管从大变小)也不是背负号角 BLH(back loaded horn 管从小变大),而更像倒相管空气谐振式的低音增量(只是频率更低)。而所谓 MLTL(mass loaded transmission line)直筒是一种 offset TL 把单元(在管里)下挪扩大补偿频率范围,我正打算尝试。(D’Appolito 的文章对传输线有简单介绍。)
我的7升传输线EVE让我头一次听清楚(譬如)Faure 佛雷钢琴复杂超低左手的音符与和弦,管风琴的音底(而不振动房子,这是实际听音乐的妥协也是优势)。
重复:传输线是“非谐振”箱体,靠长管均摊吸收消灭朝后反相中高音,只输出延时5-10毫秒并移(反)相为~90度的纯低音,补偿管道“四倍波长”,效仿音乐厅自然回声空间感。
原文摘要:
D'Appolito: “Transmission Line loudspeakers have long enjoyed a small, but dedicated following. The advantages of TL’s are well known. They are essentially non-resonant enclosures, producing a deep, well-controlled bass response. For a given driver, bass response will extend well below that produced with either a vented or sealed enclosure using the same driver. Above a few hundred Hz, the line filling material completely absorbs the driver backwave, giving the TL an open, non-boxy sound.”
audioXpress: On the original article published in audioXpress, Dennis Colin provided a complete review with measurements of the THOR project. His overall impressions stated: The speakers appear to reproduce whatever is fed them with flawless transparency. So well, they ruthlessly reveal any recording or medium deficiency.“ Colin also confirmed the impressive bass response. “These speakers don’t need any subwoofer, unless you need response down to 5Hz. (…) With these speakers, there was no audible separation or lack of coherence anywhere in the audio spectrum; the response in Joe’s room sounded flat down to 25Hz.” |
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