iBasso DC04 Ultra Balanced DAC Amplifier

Features a 0.96-inch full lamination color display with dynamic visuals.

Physical side buttons for volume, filter switching, gain adjustment, and channel balance control without needing an app.

Audio Performance:

Total Harmonic Distortion + Noise (THD+N): -119dB (0.00011%) at 1kHz, 300Ω load (4.4mm balanced output).

Output Power:

Balanced 4.4mm Output:

- Low Gain: 1.5Vrms

- Mid Gain: 4.2Vrms

- High Gain: 6.1Vrms

- Power: 980mW + 980mW @ 32Ω load

Single-ended 3.5mm Output:

- Low Gain: 0.76Vrms

- Mid Gain: 2.1Vrms

- High Gain: 3.0Vrms

- Power: 280mW + 280mW @ 32Ω load

Amplifier:

Independent 4-channel balanced headphone amplifier circuit.

Precise power supply voltage adjustment from +4V to +6V in 0.1V increments.

Low distortion, high dynamic range, and high power output.

Supports various headphone types from in-ear to large over-ear models.

Clock and Signal Processing:

FPGA-based audio algorithm with dual femtosecond crystal oscillators.

Hardware and software clock calibration to minimize jitter and phase noise.

DRE dynamic enhancement technology to eliminate 0dB distortion.

Full-chain four-channel true balanced circuit design.

Connectivity and Compatibility:

USB Audio Class 2.0 and 1.0 protocol support with seamless switching.

Compatible with iOS, Android smartphones/tablets, Windows, macOS, Linux computers.

Supports SPDIF output and microphone call via 3.5mm CTIA protocol.

UAC1.0 mode enables use as an external sound card for gaming consoles like Switch 2 and PS5.

Supports PCM up to 384kHz and DSD128 DoP digital signal transmission.

Microphone can be toggled on/off via device or app.

Physical Dimensions and Weight:

Build and Materials:

CNC machined austenitic stainless steel housing with multi-line cutting, brushed and polished finishes.

Integrated molded inductors with ultra-low resistance.

Ruby electrolytic capacitors for rich low frequencies and pure sound.

Included Accessories:

iBasso DC04U unit

Type-C to Type-C USB cable

USB-C to USB-A adapter

Quick start guide

Warranty card

Certifications:

Hi-Res Audio certified

Summary:

The iBasso DC04 Ultra is a high-performance portable DAC and headphone amplifier featuring advanced dual CS43198 DAC chips, ultra-low distortion, high power output, and a robust stainless steel build. It offers extensive compatibility, precise hardware controls, and a vibrant color display, making it an ideal choice for audiophiles seeking premium sound quality and versatile usage scenarios.