Fosi Audio GR70 Tube Headphone Preamp, Authentic Tube Amplifier with Vacuum 5654W x 2 and 6AC7x2, Mini HiFi Preamplifier for Home Audio, Impedance 16-300 Ohm

★★★★★ 5.0 38 reviews

$30.00
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Management number 227085392 Release Date 2026/05/09 List Price $12.00 Model Number 227085392
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Fosi Audio GR70 Tube Headphone Preamp, Authentic Tube Amplifier with Vacuum 5654W x 2 and 6AC7x2, Mini HiFi Preamplifier for Home Audio, Impedance from 16 to 300 ohms.

  • Pure Tube Amplification: The GR70 tube headphone amp combines vintage charm with modern technology, delivering the essence of tubes. Perfect for headphone lovers, it pairs perfectly with over-ear and in-ear headphones for superior sound.
  • Quad Tubes: Two 5654 W tubes and two 6AC7 tubes provide two-stage amplification. 5654W tubes boost voltage, while 6AC7 tubes provide power amplification. This configuration provides balanced, transparent and textured sound.
  • User-friendly design: This tube headphone preamplifier offers intuitive controls including a large volume knob, ventilation holes on both sides, bass and treble controls, high and low impedance mode switching, making it versatile enough
  • TWO IN ONE It supports switching low and high impedance modes to fit 16Ω-300Ω headphones, and has 6.35mm/3.5mm headphone jacks on the front and RCA input/output on the back for home HiFi audio system integration
  • Compact and Powerful: Made with a CNC machined aluminum alloy housing, the GR70 is both robust and refined. Despite its compact size, it delivers up to 300mW output power and 1.2V RCA output with signal-to-noise ratio ≥97dB for warm, clear and dynamic sound.
ASIN B0F9WTJ5LW
Item Weight 3.15 pounds
Manufacturer Fosi Audio Factory
Item model number GR70
Package Dimensions 11.77 x 10.2 x 3.7 inches

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