iBasso DX270 Digital Audio Player

R2R Ultra Architecture

The Ultimate Evolution of R2R Decoding

The DX270 is a ground-up reconstruction of iBasso’s portable R2R approach. It uses a hybrid 20-bit R2R + 4-bit String DAC architecture with an 8-channel, fully differential discrete R2R design, FPGA-Master 3.0 algorithms, and a hardware resistor compensation network. The result is very high linearity with low distortion and a low noise floor.

8-Channel, Fully Differential R2R

The DX270 features a fully balanced 8-channel R2R architecture, using dual R2R DACs per channel to help reduce zero-crossing artifacts and maintain smooth signal transitions. This differential design improves stability at low signal levels and supports an excellent measured dynamic range (see specifications below).

A Leading Technology for Superior Sound Quality

The DX270 uses a hybrid 20-bit R2R plus 4-bit String DAC architecture, with a String DAC handling high-bit processing for wide dynamic range, low distortion, and low spurious noise. By employing 344 high-precision resistors—nearly double that of standard R2R designs—iBasso aims for a more delicate, natural, and clean presentation.

Hardware Resistor Compensation Network

Combined with FPGA algorithms and a hardware resistor compensation network, decoding accuracy is improved, dynamic range is expanded, and distortion is reduced. This “software + hardware” approach targets an equivalent resistance accuracy of 1.4 parts per 100,000.

Solving Zero-Crossing Distortion

Near-zero signal behavior is a common challenge in discrete R2R designs. The DX270 uses a fully differential architecture and calibration to target ultra-low zero-crossing distortion, helping preserve subtle harmonics and vocal nuances.

Outstanding Linearity

When a DAC’s output curve departs from ideal linearity, harmonic and intermodulation distortion can increase. With tight resistor matching, precise switching, and an optimized circuit architecture, the DX270 is designed for very high linearity and a low noise floor with natural tonal balance.

Digital Platform & Playback

FPGA-Master 3.0

The DX270 is powered by FPGA-Master 3.0, featuring 7.5× more logic than the previous generation and dual femtosecond Accusilicon clocks for precise, low-noise control. Acting as both audio controller and real-time hardware calibration master, it compensates for component errors to optimize THD+N and dynamic range while supporting NOS mode and selectable digital filters.

Non-SRC Android 13 + Mango OS

The DX270 runs Android 13 with system-level SRC bypass, allowing supported apps to operate at their native resolution. It also includes Mango OS, a Linux-based audio playback system designed for lower SoC load and reduced EMI by minimizing background system activity.

What’s Included

• iBasso DX270 Digital Audio Player
• USB-C, coaxial, and burn-in cables
• Leather protective case
• 12V AC adapter
• Screen protector
• Warranty card and quick start guide

Specifications

Input / Output (Balanced / Single-Ended)

• 4.4mm balanced headphone output, 3.5mm single-ended headphone output
• 4.4mm line out / 3.5mm line out / 3.5mm coaxial output / USB OTG output
• Maximum Output Level: 7.3Vrms (6Vrms on battery) / 3.7Vrms (3Vrms on battery)
• Output Power: 1575mW + 1575mW @32Ω (THD < 0.1%) / 416mW + 416mW @32Ω (THD < 0.1%)
• Frequency Response: 10Hz–40kHz (-1dB)
• Signal-to-Noise Ratio: 128dB / 122dB
• Dynamic Range: 128dB / 122dB
• THD+N: -95dB (A-weighted, 600Ω load) / -91dB (A-weighted, 600Ω load)
• Crosstalk: 135dB / 118dB