Radius W (HP-TWF11) unique DDM (Dual Diaphragm Matrix) technology, only the world's first on the double-unit coaxial-type inner ear headphones, in particular, in-line design and featuring the two diaphragm unit, a large diameter of 15mm diameter (C part) unit is responsible for medium / low-frequency range, large-diameter diaphragm help to promote air flow speed and the performance of flexible, low-frequency-rich layers.The other a diameter of 7 mm (L part) to focus on high-frequency range to make up for lack of traditional moving coil unit high-frequency extension of the shortcomings. Two units to focus on its range of independent, in the coaxial design, the integration into a more natural range of the broader Kuo, and enhanced dynamic and detail, have a more prominent performance. Available in Red color only.