Fosi Audio GR70 Tube Headphone Amp Preamp, Authentic Tube-Amplification with Vacuum 5654W*2 & 6AC7*2, Mini Hifi Preamplifier for Home Audio, 3.5Mm & 6.35Mm Jacks Supporting 16-300 Ohms Impedance

Fosi Audio GR70 Tube Headphone Amp Preamp, Authentic Tube-Amplification with Vacuum 5654W*2 & 6AC7*2, Mini Hifi Preamplifier for Home Audio, 3.5Mm & 6.35Mm Jacks Supporting 16-300 Ohms Impedance

Brand: Fosi Audio
3.3
A$304.50
Availability:
  • In Stock

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  • 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
  • User-Friendly Design: This tube headphone amp preamplifier offers intuitive controls, including a large volume knob, dual-side ventilation holes, bass & treble controls, high and low impedance mode switching, making it versatile enough
  • Two-in-One: It supports low and high impedance modes switching to adapt 16Ω-300Ω headphones, and features 6.35mm/3.5mm headphone jacks on the front and RCA Input/Output on the rear for home audio HiFi system integration
  • Compact Yet Powerful: Crafted with a CNC-machined aluminum alloy body, the GR70 is both durable and refined. Despite its compact size, it delivers up to 300mW power output and 1.2V RCA output with SNR ≥97dB—offering warm, clean, and dynamic sound

Product Description

Fosi Audio GR70 Vacuum Tube Preamp/Headphone Amp

The GR70 featuring two replaceable 5654W and two 6AC7 vacuum tubes, offers a customizable auditory experience. Immerse yourself in the authentic warmth and smoothness of analog audio.

Integrating Vintage Charm with Modern Precision

The GR70 is a two-in-one headphone amp and preamp. Easily integrate this tube preamp into your home audio system with its multiple headphone jacks and RCA input/output options.

  • Input: RCA; Power Input: DC 12V/3A
  • Output: RCA, 6.35mm/3.5mm Headphones Output; Max Power Output: 300mW@32Ω
  • Headphone Impedance: Low Mode: 16Ω-120Ω; High Mode: 120Ω-300Ω;
  • SNR≥97dB; THD: RCA Out:≤0.26%, Phone Out:≤0.5%; Frequency Range: 20Hz - 20kHz (±1 dB)

  1. Quad-Tube Dual-Stage Amplification

    Thoughtfully selected tube combination for a musical and immersive sound.

  2. Ideal for Headphone Enthusiasts

    It pairs excellently with over-ear and in-ear headphones for superior audio.

  3. Ideal Partner to V3 & Q6

    It pairs perfectly with power amps and passive speakers for a top-notch audio setup.

  4. Customize Your Unique Sound

    With central detents to easily restore the natural sound.

  1. Smooth and Precise Control

  2. For Optimal Headphone Matching

  3. Efficient Cooling and Thermal Stability

  4. CNC Integrated Design

    Full aluminum alloy body, finely sandblasted, featuring a minimalist and durable design.

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Customer Reviews
4.4 out of 5 stars 7
4.0 out of 5 stars 10
4.4 out of 5 stars 65
4.3 out of 5 stars 374
4.6 out of 5 stars 2,882
4.4 out of 5 stars 224
4.1 out of 5 stars 780
Price
$279.99$279.99 — $159.99$159.99 $109.99$109.99 $68.79$68.79 $89.99$89.99 $79.95$79.95
Type
Tube Preamp/Headphone Amp Bluetooth Tube Preamp with DAC Preamp with Remote Control Preamp + Headphone Amp Phono Preamp with Vacumm Tubes Phono Preamp with Vacumm Tubes Phono Preamp with Vacumm Tubes
Input
RCA Bluetooth+COAX+OPT+USB RCA*3 Bluetooth + RCA RCA+3.5mm AUX Blueooth + AUX + RCA RCA+3.5mm AUX
Output
RCA + 3.5/6.35mm Headphone RCA + 3.5mm Headphone RCA + PRE-OUT RCA + 3.5mm Headphone + AUX RCA RCA RCA+3.5mm AUX
Treble & Bass Control
✔ ✔ ✔ ✔ ✘ ✔ ✔
THD
RCA OUT≤0.26% / HEADPHONE≤0.5% ≤ 0.03% ≤ 0.003% ≤ 0.02% ≤ 0.1% ≤ 0.1% ≤ 0.1%
SNR
≥ 97dB ≥ 103dB ≥ 110dB ≥ 103dB ≥ 98dB ≥ 98dB ≥ 70dB
Power Adapter
12V/3A 12V/1.5A 12V/1.5A 12V/1.5A 12V/1A 12V/1A 12V/1A
  • Item Weight: 1.43 kg
  • Item Model Number: GR70
  • Country of origin: China
  • Package Dimensions: 29.9 x 25.9 x 9.4 cm; 1.43 kg
  • Manufacturer: Fosi Audio
A$304.50
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Availability:
  • In Stock
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