Fosi Audio GR70 Tube Headphone Amplifier 19 September 2025 homepage, reviews, headphone-amps Rating: ★★★★★ A versatile tube headphone amp that beautifully interacts with headphone impedance, delivering warm, engaging sound with intuitive controls
Fosi Audio T20 Tube Amplifier Review 17 January 2025 reviews, amplifiers, homepage Rating: ★★★★☆ A compact and versatile tube amplifier that delivers a warm Hi-Fi sound, ideal for small desktop setups.
