HIFIMAN HE-R9 Dynamic Closed Over Ear Headphones with Topology Diaphragm & Bluemini R2R DAC Bluetooth Adapter/Receiver (Wireless)

BEST SOUNDING DYNAMIC DRIVERS: High sensitivity thanks to HIFIMAN's use of a rare earth magnet; Advanced voice coil; Topology diaphragm for detailed high frequency response up to 35 kHz. The "topology diaphragm" refers to the diaphragm with a special nanoparticle coating on its surface. By carefully controlling the surface structure of the diaphragm, different acoustic performance can be achieved that were previously unattainable. Bluemini R2R (users can purchase it separately or it comes with the HE-R9 wireless version): R2R structured Bluetooth DAC and amplifier; Small but powerful: HYMALAYA MODULE DAC created by HIFIMAN specially created DAC; Ultra small, extremely efficient in energy consumption, exceptionally high resolution wireless audio sound. ELEGANCE OUTSIDE, STRENGTH INSIDE: The outside of the headband is covered with high quality leather, giving it a soft and elegant appearance. Inside is high quality memory foam selected to achieve a comfortable fit and elasticity. The headband frame itself is made of solid steel. The structure is both light and strong, sturdy yet delicate, and is designed to convey detail and musicality that are unmatched in the market. Large ear cups for superior acoustics: The crimson ear cups are large and provide an internal space that contributes to a considerable volume of sound and gives the powerful driver the leeway to do its best. Cable Connections - Dual Compatibility Mode The female connector can accommodate both single-sided unbalanced 3.5mm cables and single-sided 3.5mm balanced cables (left socket). The Bluemini R2R dongle (separate purchase) can be easily connected to the left socket.