Chinese knock-off headphone amps


Has anyone had experience with Chinese made copies/knock offs of headphone amplifiers, specifically the A2's and Krell KSA5's seen on eBay? They seem well made with quality parts. Would I be throwing my money away by purchasing one?
llanger
I'll sell you an early Schitt Lyr that's been used for a total of about 2 hours and is in perfect condition if you want a head amp. I loved it but it drove my wife crazy. I'll thrown in the AKG 702's ( I think that's the model) and a headphone holder that mounts on a shelf. I keep forgetting I own it. It sounds very nice but not worth my marriage.

Graham slee makes some very good headphone amps, you should check them out. I have a Graham slee novo and I’m very happy with it. It has a daisy chained output so that you do not lose an rca output on your preamp. This is great if you run a tape deck or mini disc recorder etc...I have run many a headphone through the novo and it performs great.
https://www.hifisystemcomponents.com/amplifiers/
Simple rule to adhere to. If it is on ebay or amazon figure 90% is counterfeit knockoff china garbage. Even toilet paper from amazon is fake. Age old rule of thumb you get what you pay for and if it seems to good to be true it is. This is not only my opinion I know many people who work in customs that have confirmed this. I no longer by anything from amazon I go direct don’t care if it cost me shipping.
I have no clue what knockoff amps OP is referring to, since I didn’t even know that Krell made HPA’s. The truth of the matter though, since we’re discussing headphone amps, is that the best, most accurate ones on the market ARE made in China. Most of the best ones use THX Achromatic chipsets as their base, for example the SMSL SH-9 that I use, but there are plenty of great modes that don’t (Topping A90)