This headphone amp receives a 4/5 from TechRadar for its good detail and insight.

"Creek takes headphone-driving seriously, with two dedicated headphone amps in its lineup – three, if you regard the OBH-21 and -21SE as different models. Although both employ the same circuit, they use different components at key points, including the op-amps that do the actual amplifying. The SE uses a fast and relatively high-current part that is well suited to the task, giving a maximum output of about 100mW into headphones between 30 and 200 ohms impedance – that’s most of them."



Link: TechRadar