Fosi Audio i5 Planar Magnetic Headphones & ZH3 DAC Headphone Amplifier Bundle

This Fosi Audio headphone bundle combines the i5 open-back planar magnetic headphones with the ZH3 DAC and headphone amplifier for a complete desktop listening system.

The i5 uses a large 97 mm planar magnetic driver with a 2 μm diaphragm, 28 ohm nominal impedance, and 98 dB/mW sensitivity. Fosi recommends at least 500 mW of amplifier power, making the high-output ZH3 a strong match.

The ZH3 delivers up to 2570 mW x 2 from its 4.4 mm balanced headphone output and 640 mW x 2 from its 6.35 mm single-ended output at 32 ohms, while also providing high-resolution USB, coaxial, optical, and RCA connectivity.

Bundle Includes

• 1 x Fosi Audio i5 Open-Back Planar Magnetic Headphones
• 1 x Fosi Audio ZH3 DAC & Headphone Amplifier

Features

• Open-back planar magnetic headphone system for critical and immersive listening.
• 97 mm planar magnetic driver with nano-thin 2 μm diaphragm.
• Studio-oriented tuning designed for natural timbre and reference accuracy.
• Handcrafted walnut wood earcups with CNC-machined aluminum frame.
• Memory metal headband with dual-axis earcup arms and stepless adjustment.
• ZH3 all-in-one DAC, headphone amplifier, and preamp.
• AKM4493SEQ DAC and XMOS XU316 USB processor.
• Fully balanced internal amplification circuitry.
• Supports PCM up to 768 kHz / 32-bit and DSD512.
• 4.4 mm balanced and 6.35 mm single-ended headphone outputs.
• Three-level gain control for a wide range of headphones.
• USB, coaxial, optical, and RCA inputs.
• RCA and XLR outputs for active speakers or external amplifiers.
• Bass and treble adjustment with multiple digital filter options.
• Swappable op-amps for sound customization.

Fosi Audio i5 Specifications

• Transducer Type: Planar magnetic
• Driver Size: 97 mm
• Diaphragm Thickness: 2 μm
• Frequency Response: 10 Hz - 50,000 Hz
• Sensitivity: 98 dB/mW @ 1 kHz
• Nominal Impedance: 28 ohms
• Maximum SPL: ≥ 120 dB SPL
• Total Harmonic Distortion: < 1% @ 100 dB SPL
• Recommended Amplifier Power: ≥ 500 mW

Fosi Audio ZH3 Specifications

• Chipset: XMOS XU316, AKM4493SEQ, OPA1612 x 4
• Inputs: USB, coaxial, optical, RCA
• Outputs: 4.4 mm balanced, 6.35 mm single-ended, RCA, XLR
• Balanced Headphone Output Power: 2570 mW x 2 @ 32 ohms
• Single-Ended Headphone Output Power: 640 mW x 2 @ 32 ohms
• Supported Headphone Impedance: 16-300 ohms
• SINAD: ≥ 115 dB
• Signal-to-Noise Ratio: ≥ 121 dB
• THD+N: ≤ 0.00018%
• Noise Floor: ≤ 1.9 μV
• High-Resolution Support: PCM up to 768 kHz / 32-bit, DSD512

What's in the Box

• 1 x Fosi Audio i5 headphones
• 1 x 3.5 mm headphone cable
• 1 x 6.35 mm adapter
• 1 x i5 user manual
• 1 x Fosi Audio ZH3 DAC & headphone amplifier
• 1 x ZH3 6.35 mm adapter
• 1 x 12 V trigger cable
• 1 x IR remote control
• 1 x ZH3 user manual
• 1 x USB-A/C to USB-C cable
• 1 x DC 12 V power adapter