Name: Fosi Audio GR70 Tube Headphone Amp
Brand: Fosi Audio
Price: 18590.00 INR
Availability: OutOfStock

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Fosi Audio GR70 Tube Headphone Amp – Vintage Warmth, Modern Precision

The Fosi Audio GR70 is a premium quad-tube headphone amplifier and preamp that blends the classic charm of vacuum tube audio with the precision of modern engineering. Featuring two 5654W and two 6Ж4 replaceable vacuum tubes, it delivers a rich, warm, and immersive listening experience that brings music to life.

Its dual-stage amplification ensures exceptional clarity and tonal depth—5654W tubes boost voltage for smooth mids and highs, while 6Ж4 tubes handle power amplification for dynamic, textured bass. Whether you’re pairing with over-ear headphones, IEMs, or a full Hi-Fi system, the GR70 adapts effortlessly.

With low and high impedance modes (16Ω–300Ω), multiple headphone outputs (6.35mm & 3.5mm), and RCA input/output for preamp functionality, the GR70 fits seamlessly into any audio setup. The large top-mounted volume knob, bass & treble tone controls, and dual-side ventilation make it both functional and stylish.

Built from CNC-machined aluminum alloy, this compact yet powerful amp outputs up to 300mW @ 32Ω, offering a signal-to-noise ratio ≥97dB for clean, distortion-free sound. The Fosi Audio GR70 is the perfect choice for audiophiles seeking authentic tube warmth without compromising detail or precision.

Specifications

Model: Fosi Audio GR70
Type: Tube Headphone Amplifier & Preamp
Tubes: 2 × 5654W, 2 × 6Ж4 (replaceable)
Input: RCA
Outputs: RCA, 6.35mm, 3.5mm headphone jacks
Max Power Output: 300mW @ 32Ω
Power Input: DC 12V/3A
Headphone Impedance:
• Low Mode: 16Ω–120Ω
• High Mode: 120Ω–300Ω
Output Voltage (RCA): 1.2V
SNR: ≥97dB
Controls: Volume knob, bass & treble tone controls, high/low impedance switch
Body Material: CNC-machined aluminum alloy
Design Features: Dual-stage amplification, dual-side ventilation, compact form factor

Model: Fosi Audio GR70
Type: Tube Headphone Amplifier & Preamp
Tubes: 2 × 5654W, 2 × 6Ж4 (replaceable)
Input: RCA
Outputs: RCA, 6.35mm, 3.5mm headphone jacks
Max Power Output: 300mW @ 32Ω
Power Input: DC 12V/3A
Headphone Impedance:
• Low Mode: 16Ω–120Ω
• High Mode: 120Ω–300Ω
Output Voltage (RCA): 1.2V
SNR: ≥97dB
Controls: Volume knob, bass & treble tone controls, high/low impedance switch
Body Material: CNC-machined aluminum alloy
Design Features: Dual-stage amplification, dual-side ventilation, compact form factor

In The Box
GR70 Main Unit *1
6AC7 Vacuum Tubes *2
5654 Vacuum Tubes *2
Tube Protection Covers *2
12V/3A Power Supply *1
User Manual

Warranty Period: 1 Year from the date of Invoice
Covered: Manufacturing Defects Only
Warranty Form: https://www.theaudiostore.in/pages/warranty-claim-form
Cable: 1-month warranty only for manufacturing defects only

Fosi Audio is a dynamic brand dedicated to providing the most comprehensive range of Hi-Fi audio products in the market. We cater to passionate audiophiles by offering Hi-Fi products, DIY kits, and expert guidance, ensuring an immersive audio experience. Beyond a mere transaction, we foster enduring relationships with our clients, supporting them throughout their audio journey.

Our diverse product lineup includes the Hi-Fi power amplifier, pre-amplifier, headphone amplifier, DAC, music player, Bluetooth receiver, DIY board, DIY chassis, and an array of DIY kits. These meticulously crafted offerings embody our commitment to exceptional sound quality and innovation.

Established in China in 2017, Fosi Audio was founded by a team of devoted audiophiles. Our products have gained significant popularity within the Chinese DIY audio community, amassing a large and dedicated following. To expand our reach beyond borders, we launched this website in 2017 and began offering a selection of products on Amazon under the name "Fosi audio." However, please note that many of our outstanding products are not yet available on this website or Amazon. If you cannot find what you're looking for, simply reach out to us via email, and we will be delighted to assist you in finding the perfect product to meet your needs.

At Fosi Audio, we are not just a brand; we are your partner in achieving audio excellence. Join us on this immersive sonic journey and experience the true essence of Hi-Fi audio.

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