AKG N40 Customizable High Definition In-Ear Headphones Black/Silver From Japan 28292278235 | eBay
JABEN - AKG N40 features a hybrid driver system that includes a Knowles balanced armature and dynamic driver. The carefully selected combination of both drivers allows you to enjoy High-Resolution audio content
AKG n40 in ear Monitor - Reviews | Headphone Reviews and Discussion - Head-Fi.org