HA400 : Affordable 4 channel headphone amp

At this price I shouldn't probably write anything negative about the HA400 headphone amp. Luckily, I don't have to since it hasn't stopped working yet. The knobs feel a bit flimsy and the unit is really light! Well it could be worse honestly, the box feels actually quite sturdy. It comes with a power adapter which is great. I have used it with all kinds of headphones from Beyerdynamics DT 990 Pro to t.bone cheapos and it seems to give enough output for every type of headphones, even the 250 ohm ones. It's only less than five months old so maybe a bit early to tell whether this is good bang for the buck or not. There are similar units for over double the price so if this lasts for several years it is really a great purchase.