Fosi Audio GR70 Tube Headphone Amplifier – Hi-Fi Desktop Amp with Retro Style

Experience the warmth and depth of analog audio with the Fosi Audio GR70 Tube Headphone Amplifier – a hybrid headphone amp and preamp that brings classic tube sound into your desktop audio setup. The GR70 features pure tube amplification using two 6K4 vacuum tubes, delivering rich harmonics, smooth mids, and a natural sound signature that's ideal for vocal, instrumental, and acoustic music.

Fosi Audio GR70 Vaccum Tube Preamp/Headphone Amplifier Introduction and Demonstration

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Engineered for versatility and clarity, the GR70 supports headphone impedances ranging from 16 to 300 ohms, making it compatible with everything from consumer-grade headphones to high-end studio models. Adjustable impedance switching ensures optimal power matching, while independent bass and treble controls allow you to fine-tune your listening experience to suit your preferences or the character of your headphones.

Beyond headphones, the GR70 also functions as a high-quality preamplifier, making it ideal for pairing with active speakers or power amps. The compact form factor, solid aluminum chassis, and exposed glowing tubes give it both a premium feel and retro-futuristic aesthetic that stands out on any desk.

Whether you're looking to enhance your music, power demanding headphones, or add warmth to a sterile digital chain, the GR70 delivers audiophile-grade performance at an accessible price.

Key Features

• Pure tube amplification with dual 6K4 vacuum tubes for warm, detailed sound

• Drives headphones with impedance from 16Ω to 300Ω

• Adjustable output impedance switch for optimal headphone matching

• Independent bass and treble tone controls for custom sound shaping

• Functions as both a headphone amplifier and stereo preamp

• High signal-to-noise ratio and low total harmonic distortion

• Compact, all-metal design with visible tube glow

• Tube-rolling supported for tonal customization

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Specifications

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Categories

• DAC / Headphone - AMP
• Preamplifier
• New releases

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