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换了300b,蛮不错的。下一步是6c45pi和6h30pi
http://www.aca.gr/index/hiend/hiendArticles?row=1988
找到了一个帖子,说现在新产的6h30pi的两个版本,eh金脚和sovtek的是一致的,区别只是金脚。
然后有1990年之前产的nos 6h30dr,要比现在eh和sovtek的更好,但是可能会有贴牌假货,要注意分辨(链接中有分辨的方式,我估计这么冷门的管造假也不会多)。
这个nos的6h30dr很少见。
至于6c45pi,找到一个论坛的讨论。我贴一下听感。https://forum.bottlehead.com/index.php?topic=7660.0
Sovtek - Most grainy treble out of the three (but this could potentially be due to these tubes having the least run-time). I did burn them in for over 100 hours when I got them. Seems to be more extended up top (treble) than the Reflector tubes, but again this may be due to the slightly less smooth treble I'm hearing with these tubes.
Reflector - Most mid-centric sound out of the three tubes. Smooth treble. My preferred tubes to use with HD800's listening to most of my music collection except for really well recorded classical, instrumental, etc.
Electro-Harmonix - Less mids than the Reflector tubes. More extended up top and down below. Treble just as smooth as Reflector. I like using these tubes when listening to the best recording in my collection, especially for classical music where the extension up top and down below is a bonus.
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