I needed a dedicated headphone amp as I purchased a pair of high ohm Beyers and my audio interface was not giving me enough volume. So after much research, I discovered this unit. At first I was skeptical as it is a ChiFi and there were some people complaining about faulty units with noise issues so I thought I could give it a try and if anything I can send it back if something is wrong.
I must say that I am happy with my unit. I bought it directly from ifi (fulfilled by amazon) and it arrived in perfect condition.
It has 4 gain stages, perfect for handling anything, especially my high ohm Beyers, it has balanced output if you like that and a great analog circuit for adding bass or expanding the stereo image or both at the same time, I hardly use this feature but it may be an advantage for some people.
At $ 149 it is not a cheap product, however it is considered an entry level amp that I think everyone can like.
Please note this is not a DAC, it is just a headphone amp, so you need a proper audio input (RCA, 3.5mm or 4.4mm balanced).