Little Dot Tube Amps: Vacuum Tube Rolling Guide
Jun 13, 2022 at 1:07 PM Post #12,962 of 13,432
I dealt with Shenzhen when I bought my amp recently and everything went pretty smoothly.
 
Jun 13, 2022 at 2:45 PM Post #12,963 of 13,432
Does anyone know what happened with the brand? Their Facebook is dead, the website is down, no responses to e-mails for like a year now.

I got my first Little-Dot amp back in 2006 and in all that time they've gone through quite a few different websites. I wouldn't read too much into it as long as they remain in-stock at other places. Here is one of their older sites that mostly still works: https://www.littledot.net/
 
Jun 13, 2022 at 3:01 PM Post #12,964 of 13,432
Little Dot gear is also available through Shenzhen Audio.
 
Jun 13, 2022 at 5:12 PM Post #12,965 of 13,432
Jun 13, 2022 at 7:19 PM Post #12,966 of 13,432
Oops, I just saw your post….🤦🏻🐼**

(** panda = self-inflicted 2 black eyes…😖)
 
Jun 13, 2022 at 7:29 PM Post #12,967 of 13,432
Oops, I just saw your post….🤦🏻🐼**

(** panda = self-inflicted 2 black eyes…😖)
If you are wracked by guilt, feel free to fire off one of your excess Woo amps WAY up north...:L3000:
 
Jun 13, 2022 at 7:42 PM Post #12,968 of 13,432
There are no excess Woos. There are no excess headphones, either. 🤣🤣🤣
 
Jun 13, 2022 at 9:57 PM Post #12,970 of 13,432
As stated by Oscar Wilde, “nothing succeeds like excess”. 🤪😜🤣.
 
Jul 9, 2022 at 9:16 PM Post #12,972 of 13,432
Anyone else really love "Ultron" EF92 tubes? Ever since I got my Little-Dot II+ (MKII predecessor) back in 2006 I've tried lots of EF92 tubes and these have been my favorite. A few years ago one tube started to get noisy (background static/hiss) so I had to retire them. Finally found another pair on eBay this last week. They definitely have the sound that I remember. I love them in my Little-Dot II+. I like them a lot in my Little-Dot I+ also but with that amp, the 408A tubes tend to have a bit more gain so not really a fair comparison; I generally gravitate to the 408A, where a pair of Sylvania 408A tubes are my favorite.
 
Jul 9, 2022 at 10:13 PM Post #12,973 of 13,432
Anyone else really love "Ultron" EF92 tubes? Ever since I got my Little-Dot II+ (MKII predecessor) back in 2006 I've tried lots of EF92 tubes and these have been my favorite. A few years ago one tube started to get noisy (background static/hiss) so I had to retire them. Finally found another pair on eBay this last week. They definitely have the sound that I remember. I love them in my Little-Dot II+. I like them a lot in my Little-Dot I+ also but with that amp, the 408A tubes tend to have a bit more gain so not really a fair comparison; I generally gravitate to the 408A, where a pair of Sylvania 408A tubes are my favorite.

Ultron didn't manufacture tubes. They simply bought them from various manufacturers, relabeled them and sold them under their own name. So it may or may not be true that all "Ultron" EF92 tubes were sourced from the same maker. It sounds like you got lucky, but it would be a good idea to compare the internal construction to be sure.
 
Nov 7, 2022 at 10:58 PM Post #12,974 of 13,432
I ask friends for advice.
I bought a Little Dot MKII with the 6ZH1P-EV and 6N23P Voskhod tubes that worked without distortion with the Philips SHP9500 headphones.
I sold the SHP9500 and bought the HiFiMan HE400SE which has distortions when I turn up the volume.
I tried it with the GE Jan 5654W and the distortion subsided, but it didn't go away.
Little Dot MKII did not come with the original valve kit.
It is set to EF95 (6J1).
I have tried every possible gain adjustment and the distortions at high volume continue.
Does anyone have any ideas on how to get rid of the distortions?
HiFiMan HE400SE works perfectly with Topping L30.
I appreciate the help.
 

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Nov 8, 2022 at 8:20 AM Post #12,975 of 13,432
I don't know anything about your headphones but 6N23P are not suitable in that service. The amp is designed to use 6N6P type tubes that are much more powerful. I did try, out of curiosity, 6N23P in my LD MKIVSE and there wasn't much output from them into my Sennheiser HD650. The sound was 'sweet' but far from powerful enough. You could use other output tubes too, mostly with adapters, but 6N6P is the most common type. Different 5687 versions could be an alternative if you find them (I like them better) but you would need adapters for them. They are very powerful with good sound quality.
 

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