The Fosi Audio GR40 combines in a single device the functions of a tube preamplifier, DAC converter, and headphone amplifier. Designed to deliver the warm, sweet, and organic tone characteristic of tubes, it highlights the mid and high frequencies of the music without losing detail. The built-in headphone priority function automatically disables the main output when you connect your headphones, making it the ultimate central unit for your office or audio system.

At the heart of the digital circuit lies the renowned decoding chip ESS9028Q2M DAC. It offers superior sound fidelity, eliminating digital noise and keeping the signal perfectly clean with SNR 103dB and a dynamic range of 104dB. Through the USB input, the device supports playback of high-resolution files PCM up to 32Bit/384kHz as well as DSD256, ensuring that you hear every music track exactly as its creator intended.

Thanks to the specialized Bluetooth module Qualcomm QCC3031, the GR40 ensures a stable wireless connection with Bluetooth 5.1 range up to 10 meters. It supports advanced audio codecs aptX, aptX-HD, and aptX-LL (Low Latency), delivering rich and crystal-clear lossless sound. The low latency technology guarantees perfect audio and video synchronization, making the device ideal not only for music listening but also for movie watching or gaming.

The built-in headphone amplifier features a 3.5mm Jack output with power up to 300mW @ 16Ω, comfortably supporting headphones with impedances from 32Ω to 300Ω. On the back of the device, you will find a full range of digital and analog inputs, such as USB-C, Optical Toslink, Coaxial, and Stereo RCA for connection to active speakers or power amplifiers. The Plug-and-play function allows immediate use without the need for driver installation.