Fosi Audio GR40 Tube DAC Headphone Amp Preamp Bluetooth

Overview

The Fosi Audio GR40 is a DAC and headphone amplifier designed for desktop, apartment, and living-room systems that need Bluetooth wireless streaming, high-resolution DAC conversion, dedicated headphone amplification. Tube DAC/preamp/headphone amp with Bluetooth plus USB, optical, and coax for active speakers and cans.

Built for listeners who want measurable performance without a bulky AV receiver, the GR40 focuses on clean power, useful I/O, and strong value. Standout points include Tube-buffered DAC, preamp, and headphone amp; Bluetooth plus USB / optical / coax digital inputs; 3.5mm headphone out for desktop listening. Use this product page to compare specs and photos before you buy on Amazon.

Key Features

• Tube-buffered DAC, preamp, and headphone amp
• Bluetooth plus USB / optical / coax digital inputs
• 3.5mm headphone out for desktop listening
• Warm hybrid sound for active speakers and headphones

Who It's For

Vinyl systems and HiFi front-ends that need clean gain, source switching, or tone shaping before a power amp. The GR40 fits turntable setups, desktop preamp chains, and living-room systems that already have passive speakers and a Class-D amp.

Setup & Connectivity

On the desk or in a living-room rack, the GR40 is easy to integrate: expect Bluetooth streaming for phones, tablets, and laptops, digital inputs for PCs, TVs, and streamers, headphone outputs for IEMs and over-ear cans, phono-ready or vinyl-friendly I/O for turntable chains. Review the photos and feature list on this page, then buy through Amazon when you are ready — the same Fosi Audio hardware sold on the official store.

Why Choose the GR40

Choose the Fosi Audio GR40 when you want tube-buffered dac, preamp, and headphone amp for desktop decoding, headphone drive, and preamp duty. It sits in the same product family as Fosi’s popular TPA3255 amplifiers, balanced DAC preamps, and gaming DAC/AMPs — compact components that punch above their price on Amazon and the official Fosi Audio catalog.

Why Fosi Audio

Fosi Audio builds compact HiFi amplifiers, DACs, and desktop audio gear that punch above their price. Fosi Audio DAC/AMPs and preamps emphasize high-resolution decoding, headphone drive, and balanced options for desktop HiFi chains. Shop the same products featured on Amazon with specs and photos collected here for easy comparison.

Compare & explore

Browse more dac & amps, compare with Fosi Audio ZD3 and Fosi Audio ZH3, or see the full Fosi Audio catalog.