Fosi Audio GR40 Tube Preamplifier with DAC, Stereo Headphone Amplifier 3.5mm Home Audio for Active Speakers/Headphones, Digital to Analog Audio Converter Preamp with Bluetooth and USB/OPT/COAX

Price: S$204.82
(as of May 18, 2026 15:19:36 UTC – Details)

From the brand

Discover Fosi Audio – Your HiFi Solution! We’re a tech-driven brand, crafting innovative audio products around the world. Our vision: Affordable excellence for each consumer. Our mission: Redefining HiFi with cost-effective innovations. Join Fosi Audio on this unique audio journey!

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How did we get started?

As people who also love music and were looking for the right amplifier, we found that traditional amplifiers were too bulky and we introduced compact amplifiers with the same impactful sound quality that immediately impressed people.

What makes our company different?

Fosi Audio have something for every audiophile, from vacuum tubes and solid-state to monoblock, multichannel, or stereo configurations.

Why do we love what we do?

After seeing how much our customers love our products, they are able to enjoy even better sound. We also feel a sense of inner satisfaction.

Multifunctional DAC Preamplifier: The GR40 is a versatile tube DAC preamplifier and headphone amplifier in one. It supports Bluetooth/USB/Optical/Coaxial inputs and active speakers/3.5mm headphone output, with a priority mode for headphones.
High-Resolution Decoding: With the ES9028Q2M DAC chip, the preamplifier offers superior audio quality and flexibility. The USB sampling rate supports 32Bit/384kHz and DSD256, making an effective noise reduction to ensure lossless audio every time.
Advanced Bluetooth with Low Latency: Featuring the QCC3031 Bluetooth module, it supports aptX, aptX-HD, and aptX-LL codecs to provide detailed and clean audio sound. Also, you can get a relaxed experience with low latency when watching movies.
Compact yet Capable: With its compact form and a combination of preamp volume, bass, and treble controls, the stereo preamplifier produces a sweeter, more organic sound while preserving the midrange and treble frequencies that make music.
User-Friendly Design: The digital-to-analog audio converter GR40 is designed with user convenience at its core, allowing you to toggle between different audio inputs and restore Bluetooth—a real Plug-and-plug DAC preamplifier without any driver.

Product summary

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