Fosi Audio GR70 Tube Preamp & Headphone Amplifier

Feature:-

1.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

2.Replaceable Tubes for Custom Sound
Features two 5654W and two 6Ж4 vacuum tubes for two-stage amplification. The 5654W tubes boost voltage, while the 6Ж4 tubes handle power amplification. This setup delivers balanced, transparent, and textured sound.Users can swap tubes to explore different sound effects, adding playability and flexibility for personalized customization.

3.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

4.Free Switching Impedance Mode
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

5.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

Model: GR70Bass and Treble Adjustment: YESTubes: 6Ж4 ×2, 5654 ×2Signal Input Mode: RCAOutput: 3.5mm headphone + 6.35mm headphone + RCA full-range signal outputRated Output Power: 32ohm, Low Gain: 67mW; High Gain: 830mWInput Voltage and Current: 12V 3ASignal-to-Noise Ratio: ≥97dBFrequency Response: 20Hz-20kHz (±1dB)Dynamic Range: 97dB

 
 
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