The EF500 is an innovative combination of a DAC and headphone amplifier optimized for streaming content. The device is characterized by very low distortion, minimal noise, and excellent energy efficiency. At the heart of the EF500 is the Hymalaya R2R DAC from Hifiman, which was awarded the prestigious VGP Gold Technology Award in Japan for its outstanding quality and performance. With a powerful output of 4.5 watts in balanced mode and 1.32 watts in unbalanced mode, the EF500 opens up diverse possibilities for experiencing music. Users can play music directly from a NAS system, stream from mobile devices, or use the DAC and headphone amplifier through traditional coaxial or USB inputs. A user-friendly volume control and a 4-stage gain switch make operation easy, while versatile connection options such as a 6.3 mm unbalanced headphone output, a 4-pin XLR output for balanced headphones, as well as RCA and XLR outputs ensure high compatibility. With support for network streaming and various inputs like USB-C, USB-B, and coaxial, the EF500 offers excellent audio parameters: a THD+N of 0.0025%, a channel separation of over 130 dB, and an SNR of 117 dB. Its maximum output of 4.5 WPC (balanced) and 1.32 WPC (unbalanced) and a weight of 3.37 kg highlight the solid construction and high performance of the device. The EF500 is a masterpiece of technological innovation and design for audio and tech enthusiasts. With its award-winning D/A converter and a combination of durable construction, elegant design, and ease of use, it heralds a new era of audio devices that push existing boundaries.