Fosi Audio - i5 Open-Back Planar Magnetic Headphones & GR70 Tube Headphone Amp (Orange)

So Happy Together: Fosi Audio i5 Open-Back Planar-Magnetic Headphones and GR70 Tube Headphone Amplifier Reproduce Music with Warm, Rich Sound and Give You a Stylish, Coherent Hi-Fi Combination

Unwind after a long work day, disappear into your own personal space, or simply shut off the outside world by turning to the Fosi Audio i5 open-back planar-magnetic headphones and GR70 tube headphone amplifier. This affordable, attractive combination goes together like good ol' peanut butter and jelly, and gives you fabled hi-fi tube sound you can enjoy anytime you want. 

The result of more than a year of in-house development and tuning, i5 takes no shortcuts. It delivers superb fidelity via a nano-thin diaphragm and stealth magnets. You’ll hear highly resolved, low-distortion sound distinguished by the kind of presence associated with concerts and imaging affiliated with high-end stereos. 

Boasting a wide frequency response and 98dB sensitivity, i5 leverages the benefits of a large 97mm driver (at 2μm thickness) accounts for fast, clean playback  and vivid detail. A magnetron-sputtered silver-alloy coating further enhances clarity while ensuring long-term durability. In addition, 44 symmetric N50 magnets supply purity and naturalism, along with point-sharp transients crucial to what you want to hear. 

On the gorgeous exterior, a rigid high-transparency acoustic mesh performs the roles of damping, helping to account for the smooth sonics and expansive soundstages. Paired with a CNC-milled aluminum frame, handcrafted walnut wood chambers combine with a genuine sheepskin headband and S-design accents to ensure i5 is both comfortable and stylish. Last but not least, the headband includes multi-axis pivoting earcups engineered to instantly adapt to your head shape. Breathable leather ear pads complete the look and feel.

The GR70 tube headphone amp pairs two 5654W and two 6Ж4/6Ж8 tubes for two-stage amplification that provides detailed, balanced, transparent sound. Able to support headphone impedance ranging from 16 to 300 ohms, GR70 can also double as a preamplifier thanks to its rear-panel RCA input and output. Boasting a dynamic range and SNR of more than 97dB, this pint-sized device is rated at 90mW (at 32 ohms) and allows for high- and low-impedance mode switching for excellent versatility.

Clean and dynamic, GR70 is a joy to use. Its CNC-machined aluminum alloy body houses a top-panel volume knob, bass and treble controls, and dual-side ventilation holes to help it run cool. A 12V power supply and tube protection covers come standard, along with a two-year manufacturer warranty. 

Have any questions about this winning combo? Give us a call at 312-433-0200 and we can help!