Bring tube warmth and high-resolution digital decoding to your desktop setup with the Fosi Audio GR40. Featuring an ESS Sabre ES9028Q2M DAC chip, Qualcomm QCC3031 Bluetooth 5.1 with aptX HD support, vacuum tube preamplification, and tone control knobs, the GR40 functions as a versatile hub for active speakers and headphones.

* Vacuum Tube Preamplification
Utilizes dual vacuum tubes in the preamp stage to add organic harmonic warmth, smooth treble response, and rich vocal presence to digital audio sources.

* ESS Sabre ES9028Q2M High-Resolution DAC
Built around the high-performance ES9028Q2M DAC chip, the GR40 supports USB audio decoding up to PCM 32-bit/384kHz and native DSD256 with effective noise reduction and dynamic range.

* Qualcomm QCC3031 Bluetooth 5.1 Wireless Input
Stream wireless audio with low latency and high clarity using Qualcomm Bluetooth connectivity supporting advanced audio codecs including aptX, aptX HD, and aptX Low Latency.

* Dedicated Treble and Bass Tone Controls
Fine-tune your sound profile with physical treble and bass adjustment knobs, allowing you to tailor frequency response for different headphones, active desktop speakers, or music genres.

* Multifunctional Output with Headphone Priority
Features a 3.5mm front-panel headphone output alongside rear L/R line outputs for active powered speakers or external power amplifiers, automatically muting speaker output when headphones are connected.

* Comprehensive Digital and Analog Connectivity
Supports multiple input options including USB Type-C, Optical, Coaxial, and Bluetooth, with convenient front-panel toggle switching between sources.

What is in the Box

* 1 x Fosi Audio GR40 Tube DAC Preamplifier
* 2 x Preamp Vacuum Tubes
* 1 x Bluetooth Antenna
* 1 x USB Data Cable
* 1 x Power Adapter
* 1 x User Manual

Technical Specifications

* DAC Chipset: ESS Sabre ES9028Q2M
* Bluetooth Module: Qualcomm QCC3031 (Bluetooth 5.1)
* Bluetooth Codecs: SBC, AAC, aptX, aptX HD, aptX LL
* USB Sampling Rate: PCM up to 32-bit/384kHz, Native DSD up to DSD256
* Optical / Coaxial Sampling Rate: Up to 24-bit/192kHz
* Inputs: USB-C, Optical, Coaxial, Bluetooth 5.1
* Outputs: 3.5mm Headphone Output, L/R RCA Line Output (Pre-Out)
* Tone Controls: Bass (±6 dB), Treble (±6 dB)
* Chassis Material: Aluminum Alloy
* Power Supply: DC 12V