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
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Product details
| Management number | 208609429 | Release Date | 2026/03/22 | List Price | $80.00 | Model Number | 208609429 | ||
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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
| Color Name | Black |
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| Item Weight | 3.1 pounds |
| Material Type | Aluminum Alloy |
| Connector Type | 3.5mm/6.35mm Jack, RCA |
| Output Wattage | 300 Watts |
| Item model number | GR70 |
| Compatible Devices | CD/DVD, DCA, Laptop, PC, Tablet |
| Product Dimensions | 6.3 x 4.2 x 1.5 inches |
Preamplifiers
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