- High-performance DAC and USB decoding chip]: The K5 Pro ESS headphones reach higher levels of sound quality and feature high-definition sound. ES9038PRO with 32-bit processing, along with the XUF208 USB decoding chip with 768kHz and DSD256 inputs, it also supports phone connection. - A variety of inputs :Supports coaxial/optical/RCA inputs with optical and coaxial inputs supporting up to 192kHz, the K5 Pro ESS amplifier is suitable for many music players and digital interfaces. - A variety of outputs :Supports 6.35mm (1/4 inch). Headphone/RCA output, RCA signal adjustable up to a maximum of 2V, so the K5 Pro ESS portable converter can be used with a variety of active speakers and external speakers. - Compatible with high or low impedance headphones]: For a total power output of up to 1.5W under a 32-ohm load, and up to 20Vpp at 300 ohms, the K5 Pro ESS desktop amplifier can easily handle any low or high impedance headphone. - Multiple headphones compatible with all sensitivity levels]: With ADC volume adjustment, the K5 Pro ESS portable amplifier allows you to smoothly adjust the sound in very fine increments without any unwanted noise or channel imbalances. This means you can comfortably use different headphones with different sensitivity levels.