Wow I was looking at the Superlux HD681 EVO's also. I have been watching them on eBay for $29.00 USD. Please post when and if you get them and give us your review. I have also been watching Superlux IEM's as well. Haven't tried any of their headphone or IEM's before, but I do own about  20...

Quote: Ok after some 50 hours or more of burn in, here are my updates. It's a $20.00 tube pre amp. Yep, It is fairly clean, no noise that I can discern , even full volume no input, maybe slightly more open in the middle frequencies, a tad bit of lower mid to bass punch. To be perfectly...

Pretty cool, can someone post a link for the English part of the HiFiman web site? Or is there an English version. I been all over the site but don't see any language link that I can read. Thanks jamato8 for the posts and photo's.

I just received a Little-Bear P5 that is the two BK 6N1 China tube pre amp. Not a headphone amp but a pre amp with in-out RCA. I think it is a hybrid type amp, as the power transformer that is included is 110v to 18vac very small. And gets very very hot, so hot in fact that I have to set it In a...

I would go with the Little-Bear P5., I was trying to hold out for a little Dot MK5 but, can't budget it right now. The Little-Bear P5 is a two tuber, one for each channel. Actually, probably not even a comparison between them.   Anyway I just got mine yesterday. Only on the second week...

Ok 10 to 15 mins later the new Little Bear P5 is together and working.. I counted on a little burn in with the tubes would be in order. I started listening with sound output from my PC to input to amp, to my powered PC speakers. They are old Altec Lansing Model ACS 300.1 satellite speakers...

First thing I would try is new tubes. There are several tubes that can be used in it. I just received mine today as well, but it is new, so hopefully I will not have any issues with it. We'll see and I'll post my review of it once I assemble it, as it was a kit. Not that I need, but was...