[Upgraded Planar Magnetic Driver] Stax Spirit S5 utilizes planar magnetic drivers with EqualMass diaphragm for uniform driving force across the surface, ensuring original sound, low distortion, and fast response. Its second-gen upgraded EqualMass wiring structure enhances diaphragm stability across all frequencies with a symmetric layout. [Cd Loseless Audio for Audiophiles] Powered by Qualcomm QCC5181 Bluetooth SoC platform and Qualcomm Snapdragon Sound tecnology, the S5 offers robust Rf connection and lower power consumption for extended listening. It supports Ldac, Lhdc, and all audio codecs within the Snapdragon Sound Technology Suite, including aptX Hd, aptX Adaptive, and aptX Lossless. [Multiple Connectivity Options] The Stax Spirit S5 features the latest Bluetooth V5.4, Google Fast Pair, Usb-c and Aux cables for seamless connection. The Bluetooth V5.4 ensures a stable and fast transmission connection, and enables simultaneous connection to two Bluetooth audio devices.