AIYIMA H4 Portable DAC, DDC and Headphone Amplifier
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The AIYIMA H4 is a high-performance portable USB DAC and headphone amplifier designed to deliver studio-grade audio quality on the go. Engineered around the premium ESS ES9039Q2M decoding chip, this compact device transforms digital audio from smartphones, PCs, and gaming consoles into an ultra-clean, high-resolution acoustic experience. Featuring both 3.5mm single-ended and 4.4mm balanced outputs, a built-in OLED status screen, and a robust dual operational amplifier architecture, it packs desktop-tier power and versatility into a sleek, pocket-sized aluminum chassis.
The AIYIMA H4 is a high-performance portable USB DAC and headphone amplifier engineered around a premium ESS ES9039Q2M SABRE decoding architecture. It natively supports ultra-high-resolution digital audio up to 32-bit/768kHz PCM and DSD512, while featuring a hardware UAC 1.0/2.0 switch for native compatibility with standard OS platforms and legacy gaming consoles.
The amplification stage utilizes dual RT6863 operational amplifiers capable of delivering up to 240mW of balanced output into 32Ω, maintaining an ultra-low Total Harmonic Distortion plus Noise (THD+N) of 0.00056% and an impressive 122dB Signal-to-Noise Ratio (SNR). This internal design yields an exceptionally low noise floor and clean transient response across its 3.5mm single-ended and 4.4mm balanced pentaconn outputs, all manageable via an integrated OLED telemetry display that provides real-time sampling rate, gain status, and digital filter selection.
Features
- Core Decoding Chip It features the premium ESS ES9039Q2M DAC chip, which supports ultra-high-resolution audio decoding up to PCM 768kHz/32-bit and native DSD512
- Amplification Built around a dual operational amplifier configuration (RT6863 ×2) to deliver a pure signal with minimal background noise and distortion
- Outputs Equipped with a 3.5mm single-ended jack and a 4.4mm balanced terminal
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Power Output
- 3.5mm Single-ended: 125mW @ 32Ω
- 4.4mm Balanced: 240mW @ 32Ω (capable of driving demanding headphones up to 300 ohms)
- Total Harmonic Distortion (THD+N) Exceptionally low at 0.00071% (3.5mm) and 0.00056% (4.4mm)
- Signal-to-Noise Ratio (SNR) 122dB on the single-ended line and 120dB on the balanced connection, which ensures an extremely dark, "hiss-free" background.
- Form Factor Highly portable, weighing only 22.5 grams with a sleek aluminum chassis measuring just 56×23×12.5mm
- Sound Customization: Includes high/low hardware gain settings and 8 digital PCM filter modes allowing you to fine-tune the sound signature to your preference
- DDC Functionality: It can act as a Digital-to-Digital Converter (DDC), turning USB audio input into a coaxial digital output to feed a secondary external desktop DAC
- Gaming Support: Features a UAC 1.0 mode, making it immediately compatible with modern gaming consoles like the Nintendo Switch and PlayStation 5
- Display: Includes a small built-in OLED screen paired with physical navigation buttons to view audio sample rates and easily adjust system settings
Specifications
- DAC Chip: Single ESS ES9039Q2M (SABRE high-fidelity 32-bit architecture)
- Amplifier Circuitry: Dual RT6863 operational amplifiers
- Display: 0.91-inch OLED screen for telemetry, menu navigation, and sample rate confirmation
- Chassis Material: CNC-machined aluminum alloy
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Maximum Sampling Rate
- PCM: 768kHz/32bit DSD512 (Dop)
- S/PDIF Mode: PCM 384kHz Dop128
- PCM: 768kHz/32bit DSD512 (Dop)
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Decoding Support:
- PCM: up to 32-bit / 768kHz
- DSD: Native up to DSD512
- Supported Systems Android / IOS / Windows10-11 / MacOS
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Signal-to-Noise Ratio (SNR)
- 3.5mm Output: 122dB
- 4.4mm Output: 120dB
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Total Harmonic Distortion (THD+N):
- 3.5mm Output: 0.00071% (@ 1kHz)
- 4.4mm Output: 0.00056% (@ 1kHz)
- Frequency Response: 20Hz – 20kHz (±0.5dB)
- Output Power
- 3.5mm Single-Ended: 125mW @ 32Ω
- 4.4mm Balanced: 240mW @ 32Ω
- Headphone Impedance Matching: 16Ω – 300Ω
- Input Terminal: USB Type-C
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Output Terminals
- 3.5mm TRS single-ended headphone jack
- 4.4mm TRRRS balanced Pentaconn jack
- 3.5mm Coaxial SPDIF (Digital-to-Digital Converter mode via specialized cable)
- Physical Interface: Independent volume up/down buttons and menu navigation buttons
- USB Audio Class: Dual mode UAC 1.0 / UAC 2.0 (hardware switchable via menu for gaming console compatibility)
- Digital Filters: 8 selectable PCM reconstruction filters built into the hardware
- Gain Settings: Hardware High / Low gain switching
- Dimensions: 56 mm × 23 mm × 12.5 mm
- Weight: 22.5 grams
Includes
- 1 x H4
- 1 x USB C > C Cable
- 1 x USB A > C Adapter
- 1 x User Manual
Support
About
AIYIMA stands as a celebrated pioneer in the modern audiophile landscape, renowned for making genuine, high-fidelity sound accessible to music lovers worldwide. By seamlessly blending cutting-edge engineering—such as high-performance Texas Instruments amplification chips and premium internal capacitors—with compact, elegant desktop designs, the brand has revolutionized the budget audio market. Highly praised by audio enthusiasts and reviewers alike, AIYIMA components deliver an incredibly clean, powerful, and detailed acoustic performance that consistently punches far above their price point, proving that breathtaking sonic clarity and premium build quality do not require a luxury budget.