Introduction

Many of you are probably unfamiliar with the Head-Direct company. In short it is a online retailer that specializes in headphones and earphones. This company is the official retailer of many more or less unknown Asian brands like for example Yuin and Dowin. Head-Direct has a lot of interesting earphones and headphone amps.

The earphones I will be taking a look at today are called Yuin OK2s which is the OK1's little brother. Where the OK1s are high impedance the OK2s are made for use with most modern DAPs. The OK2’s impedance is only 16 Ohms like most ordinary earbuds made today. This makes them ideal for a somebody looking to upgrading their portable rig with a serious pair of earbuds. The OK2s can function both as normal earbuds and as in-ears which makes them quite unique.

The Package

The packaging is not final for the Yuin OK2s so the sample I just came in a number of small plastic bags. With the OK2s you get a lot of tips. You get three different sized single flange tips, one double flange tip, and a rubber earbud cover. Just like its bigger brother, the OK2s can be used both as canalphones and as earbuds. In order to convert them from earbuds to earphones all you got to do is screw on a plastic barrel and apply a tip on its end.


The tip selection that comes with the OK2s is the same as that of the OK1s. Only difference in the bundle is the lack of the 1/8" to 1/4" adapter. Since the OK2s are aimed at portable use it is a completely reasonable decision since all never DAPs have a 1/8" headphone out. Unlike the OK1s the OK2s have a fairly low impedance which makes them really easy to drive. The impedance rating listed is 16 Ohms and the efficiency is high. This is great because it allows you to run them off your DAP without having to lug around an amplifier to make them sound their best.