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HEAD-DIRECT EF1 Hybrid Headphone Amp - Page 2  

post #16 of 19
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shuguang tube factory
head-direct: The Web Store of HiFiMAN
post #17 of 19
Quote:
Originally Posted by Nankai View Post
shuguang tube factory
IMO, the quality of the tubes being manufactured in China has improved by leaps in bound. I remember using 12AX7 tubes in my Fender Champ amp and I literally had to switch to NOS tubes. This was about 15 years ago.

Now w/ the EF-1 as well as other Chineese tube amps their sound is very good w/ the stock tubes. For example, I have two NOS 12AU7's for the EF-1. IMO they are not that much better than the Chinese tubes that come w/ the amp.

I know that many here will jump on my case but that is what I hear.
post #18 of 19
Certainly better than Electro-Harmonix.

China has been taking a serious interest in experimenting with cryo treated tubes in the last couple of years.
post #19 of 19
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