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Fosi Audio GR70 Tube Headphone Amplifier
The Fosi Audio GR70 is a high-fidelity tube headphone amplifier designed for audiophiles seeking rich, warm sound with both headphone and preamp output capabilities. Featuring premium vacuum tubes and a dual-mode output, it enhances audio detail and dynamics across various headphone types and audio sources.
- Input impedance
- Low Impedance Mode: 16Ω-120Ω, High Impedance Mode: 120Ω-300Ω
- Rated power output
- 300mW @ 32Ω max
- Power Requirements
- 12V/3A
€249.95
8 in stock
Delivery options and total cost confirmed at checkout.
Ask us to check connections, dimensions and compatibility before you order.
Get compatibility adviceHighlights of the Fosi Audio GR70 Tube Headphone Amp
- Uses two 6K4 vacuum tubes for smooth, analog tube warmth
- Compatible with 16–300Ω headphones via 3.5mm and 6.35mm outputs
- Selectable headphone amp or preamp output modes
- Solid aluminum chassis with low-noise power supply
Product details Fosi Audio GR70 Tube Headphone Amp
Fosi Audio GR70 Tube Headphone Amplifier and Preamp
The Fosi Audio GR70 is built to elevate headphone listening with the signature warmth of vacuum tube amplification. It offers dual headphone outputs (3.5mm and 6.35mm), making it compatible with a wide range of headphone impedances from 16 to 300 ohms. A mode switch allows easy toggling between headphone amp and preamp functions, adding flexibility to integrate with powered speakers or stereo systems. The GR70’s compact aluminum design and minimal distortion circuitry ensure clean, immersive playback, while the easy tube-swapping design lets users experiment with different sound signatures. This unit is ideal for desktop audiophiles looking for a compact yet powerful analog upgrade.
Specifications
| Article number | GR70 |
| EAN | 6976136960904 |
| Rated power output | 300mW @ 32Ω max |
| Signal-to-noise ratio (SNR) | >97dB |
| Distortion | RCA OUT:≤0.26%, PHONE OUT:≤0.5% |
| Frequency response | 20Hz-20kHz |
| Input impedance | Low Impedance Mode: 16Ω-120Ω, High Impedance Mode: 120Ω-300Ω |
| Input connection type | RCA |
| Speaker output connection type | RCA, 6.35mm & 3.5mm jack |
| Power Requirements | 12V/3A |
| Dimensions (L x W x H) | 12.9×19.2×4.6 cm |
| Article number | GR70 |
| EAN | 6976136960904 |
| Rated power output | 300mW @ 32Ω max |
|---|---|
| Signal-to-noise ratio (SNR) | >97dB |
| Distortion | RCA OUT:≤0.26%, PHONE OUT:≤0.5% |
| Frequency response | 20Hz-20KHz |
| Input impedance | Low Impedance Mode: 16Ω-120Ω, High Impedance Mode: 120Ω-300Ω |
| Input connection type | RCA |
| Speaker output connection type | RCA, 6.35mm & 3.5mm jack |
| Power Requirements | 12V/3A |
| Dimensions (L x W x H) | 12.9×19.2×4.6 cm |
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