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
Convolution Filter for AKG N40 - Roon Software Discussion - Roon Labs Community
Ears-on with AKG's customisable premium headphones
AKG N40 | Headphone Reviews and Discussion - Head-Fi.org