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Fosi Audio i5 Open-Back Planar Magnetic Headphones with 97mm Ultra-Large Diaphragm and Fosi Audio GR70 Tube Headphone Amp Preamp, Authentic Tube-Amplification with Vacuum 5654W*2 & 6AC7*2
- Immersive Listening, Pure Original Sound : Experience high-fidelity sound with nano-thin diaphragm and symmetrical magnets. Precision acoustics deliver high-resolution, low-distortion sound for live-performance realism
- 97mm Ultra-Large Diaphragm : 97mm Nano-Level driver at 2μm thickness reveals microscopic details. Sputtered silver alloy coating enhances clarity while ensuring long-term sonic consistency and durability
- Ergonomic Design, Long-Lasting Comfort : Memory-steel metal headband with multi-axis pivoting earcups adapts instantly. Silicone sliders enable micro-adjustments. Breathable skin-friendly earpads eliminate fatigue during extended sessions
- Pure Tube-Amplification: The GR70 headphone tube amp combines vintage charm with modern tech, delivering authentic tube essence. Perfect for headphone enthusiasts, it pairs excellently with over-ear and in-ear headphones for superior audio
- Quad Tubes: Features two 5654W and two 6AC7 vacuum tubes for two-stage amplification. The 5654W tubes boost voltage, while the 6AC7 tubes handle power amplification. This setup delivers balanced, transparent, and textured sound
$699.99
Original: $759.98
-8%Fosi Audio i5 Open-Back Planar Magnetic Headphones with 97mm Ultra-Large Diaphragm and Fosi Audio GR70 Tube Headphone Amp Preamp, Authentic Tube-Amplification with Vacuum 5654W*2 & 6AC7*2—
$759.98
$699.99Product Information
Product Information
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Shipping & Returns
Description
- Immersive Listening, Pure Original Sound : Experience high-fidelity sound with nano-thin diaphragm and symmetrical magnets. Precision acoustics deliver high-resolution, low-distortion sound for live-performance realism
- 97mm Ultra-Large Diaphragm : 97mm Nano-Level driver at 2μm thickness reveals microscopic details. Sputtered silver alloy coating enhances clarity while ensuring long-term sonic consistency and durability
- Ergonomic Design, Long-Lasting Comfort : Memory-steel metal headband with multi-axis pivoting earcups adapts instantly. Silicone sliders enable micro-adjustments. Breathable skin-friendly earpads eliminate fatigue during extended sessions
- Pure Tube-Amplification: The GR70 headphone tube amp combines vintage charm with modern tech, delivering authentic tube essence. Perfect for headphone enthusiasts, it pairs excellently with over-ear and in-ear headphones for superior audio
- Quad Tubes: Features two 5654W and two 6AC7 vacuum tubes for two-stage amplification. The 5654W tubes boost voltage, while the 6AC7 tubes handle power amplification. This setup delivers balanced, transparent, and textured sound




















