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Portable tube amp from china?
Oct 3, 2015 at 4:37 PM Post #46 of 916
I switched out the chinese tube for a 6021 from Thomson-CSF and the distortion at high volumes is gone, sound has a lot more clarity and the instrument separation is a lot better than before. All in all, it made much more of a difference than I expected.
 
Oct 3, 2015 at 6:48 PM Post #47 of 916
Do you have a link for the tube? I got the little bear b3 recently and am loving it so far. I found it on Amazon for 50 and it's definitely worth it. Although it has a pretty terrible noise floor but it's not an issue when using less sensitive headphones.
 
Dec 2, 2015 at 2:20 PM Post #48 of 916
I got my B1 through the post today and have been playing with it. I am not getting too much heat off of it at the moment. The vendor said it was version 1.2
 
In this version. upgrade 3 options:
1,Solved big "POP" wave noise problem, it was happen in  turn ON/OFF amplifier,current the POP noise is very lower. just like a clock tick sound. keep safe for your headphone
2,Solved the scratch noise,it was happen in you turn UP or DOWN the volume, current. that noise is gone
3,Improve the amplifier working time. because we improve the PCB circuit,change some parts. and the work time is up to 4 hours now.(before just about 2.5-3 hours)
 

 
There is a little pop when turning on and off but nothing major and listening to some female vocals at the moment it has warmed the top end. Liking it at the moment.
I am a little worried about strapping a player to it as you will cover vent on one side and then if you have the player facing up the 2nd vent hole is on the desk. 
 
Jan 13, 2016 at 10:52 AM Post #49 of 916
thesheik137 said:
I also recently ordered the Little Bear B3 portable amp and was wondering if you got yours and how it sounds.
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It sounds amazing with my iBasso dx90 + Audio-Technica ATH-W1000X full-size headphones or my Ultimate Ears Triple Fi 10 earphones. Soundstage is deep and airy, sound is very natural and clear!!!
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Jan 14, 2016 at 3:59 AM Post #50 of 916
I'm interested to get B3 as a portable self powerered tube amp for 85$ But was wondering is it could power dt990 600ohms. Can anybody chime in? I have already asked the seller and yet to get a reply from him
 
Jan 18, 2016 at 9:52 AM Post #54 of 916
golov17 said:
How many hours of work Little Bear B3 with headphones 320 Ohm, and whether it can work if you connect the charger or the Power Bank? I found a thin 5V 5K mAh for him and I hope it can increase the time it works ..
 
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I didn't measure it, but my iBasso dx90 hi-res player out first. Yes, it can work via charger.
 
Apr 5, 2016 at 8:16 AM Post #60 of 916
pitbul34 said:
I prefer dual to mono opamp module AD825AR instead of NE5532 (Little Bear B3 factory installed), however NE5532, OPA2604, PA627AU sounds pretty good too. Factory installed tubes are good old USA made Sylvania.
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Earlier in this thread, .I posted how I had the B1 and also an expensive money ALO portable tube amp...

I have neither now and miss them,
So I ordered the latest dual tube model you have in silver.

Once it arrives, I will post how it compares from memory of other, plus my O2, if I still have that,
because I not care about that one and it stayed in closet for over a year..
:p
 
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