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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.
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.
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Speakers
Amplifiers
DAC converters
DSP modules
Turntables
Streamers
Woofers
Tweeters
Exciters
Bass shakers
Plate amplifiers
Amplifier modules
Single board computers
Assembled crossovers
Printed Circuit Boards (PCB)
Capacitors
Resistors
Coils
Circuit Breakers
Crossover tools
Screw terminals
Acoustic measurements
Electric measurements
Sound level meters
DIY amplifier kits
DIY component packs
DIY speaker kit
DIY subwoofer kits
DIY bluetooth speaker
DIY electronics kits
Binding posts
Cabinet Hardware
Cables
Connectors
Speaker cabinets
Electromechanics
Power supplies
Speaker repair
Workshop & tools
Amplifier accessories
Stands & mounts
Gift voucher
Books
New products
