Cayin A 300B

I am also a great fan of Cayin products, great sound, great value.  I own their tube integrates. Also, the VAS line, sold by the USA distributor is great, I own the mono blocks and the Citiation 1 pre-amp, which is a knock off of the classic HKI, updated with SOTA parts.  Both I made by Cayin . I have had Marantz and McIntosh tubes and Cayin/Vas have better sound.  Cayin approach is to take classic tube design and marry it with SOTA parts and sell at reasonable price.  No need to revent the wheel.

I believe the same, Coolhunter, no need to reinvent the wheel. Cayin products prove that a classic approach works great if you put a lot of care and the best parts together. I'm very happy with the quality of my small Cayin and the sound is also great. But I do prefer single ended to a push-pull. I will happily move to another Cayin amp (the 300B) if it stands up against the Line Magnetic SETs. 

I own a Cayin 688R. Only one in the world I think. 

I have owned the Cayin A50T & while they are fine products IMO the Yaqin MS-300C is every bit as good an amp,almost identical build/parts quality & less $...

I'd be interested to hear what rrfrerichs1950 thinks of the 688R, and what tubes he uses in it. The ultimate tube integrated - with a tone control no less.