
Fosi Audio GR40 Vacuum Tube Preamp/Headphone Amp with DAC
Equipped with the ES9028Q2M DAC, the GR40 offers pristine sound quality through multiple input options, and the added tube warmth enriches the audio with a classic, organic touch.

Combining Vintage Warmth with Modern Clarity
The GR40 supports USB, optical, coaxial, and Bluetooth inputs, making it compatible with a wide range of audio sources. The device includes input mode indicators for easy selection. With high-resolution DSD support, it delivers exceptional sound quality.
- Input: Bluetooth, USB, Optical, Coaxial
- Output: RCA, 3.5mm Headphone Output
- SNR≥103dB; THD<0.03%; Power Supply: 12V 1.5A
- Bluetooth Codecs: SBC, AAC, aptX, aptX HD, aptX LL
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Tube Preamp/Headphone Amp with DAC
Classic tube amplification delivers natural warmth and harmonic richness
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In the Same Series and Form Factor
We’ve added bass, treble adjustment, and bluetooth connectivity for exceptional sound quality.
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