iBasso DC-Tonfa Portable R2R DAC & Amp | 800mW Balanced Headphone Amp

Brand: iBasso

€353,95 EUR

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Color: Blue

Desktop-Grade R2R Performance in the Palm of Your Hand

Co-developed with Japan’s premier Hi-Fi specialist e☆Earphone, the iBasso DC-Tonfa is a breakthrough portable USB DAC and headphone amplifier (dongle DAC). Packing a true 24-bit discrete 8-channel fully balanced R2R ladder network, it delivers the rich, natural timbre of desktop-tier R2R audio with unmatched detail, dynamics, and ultra-low noise—wherever you go.

Why Choose the iBasso DC-Tonfa Portable DAC/Amp?

8-Channel True Balanced Discrete R2R Architecture

The DC-Tonfa shrinks desktop-class audio circuitry into a compact dongle. Featuring a 24-bit 8-way fully differential R2R DAC architecture, it effectively minimizes zero-crossing errors and low-level nonlinearity. Experience lush R2R musicality blended with extraordinary resolution and natural warmth.

312 High-Precision Viking Metal Film Resistors

Equipped with 312 ultra-low temperature drift Viking metal film resistors, the DC-Tonfa’s ladder network far outclasses traditional portable R2R dongles. A hardware compensation network of 60 precision resistors works seamlessly with custom FPGA algorithms to strictly control resistance tolerances and thermal drift for pure, uncolored sound reproduction.

Self-Developed FPGA + Dual Accusilicon Femtosecond Clocks

Backed by 20 years of portable Hi-Fi innovation, iBasso’s proprietary FPGA algorithms dynamically correct individual resistor tolerances on the fly. Paired with dual Accusilicon femtosecond crystal oscillators, jitter is practically eliminated, resulting in exceptional clarity, precise timing, and realistic soundstage depth.

NOS Mode + 4 Custom Digital Filters

Break free from conventional limits. In addition to pure NOS (Non-OverSampling) mode, the DC-Tonfa features four proprietary self-developed digital filters inside the FPGA, allowing audiophiles to tailor their listening experience from warm and smooth to fast and detailed.

Monster Power Output: 800mW + 800mW @ 32Ω

The analog amplification stage features an aggressive OP+BUF architecture—utilizing 2 TI high-performance dual op-amps and 4 BUF634A buffers. Delivering up to 800mW + 800mW @ 32Ω through its 4.4mm balanced output, the DC-Tonfa easily drives demanding IEMs and full-sized audiophile headphones.

LT3042 Ultra-Low-Noise LDO Reference Power

Powered by Linear Technology’s flagship LT3042 ultra-low noise LDO regulator, the DAC circuit boasts a noise floor as low as 0.8μV and a 100dB PSRR. It delivers power cleaner than most battery-operated portable devices, providing a pristine, jet-black background for your music.

Low Power Consumption & High Efficiency

Despite its massive output power, the DC-Tonfa stays incredibly power-efficient. In NOS mode, current draw drops below 100mA at 5V (48kHz sample rate), preserving your smartphone's battery life—even when paired with power-restricted iPhones.

OLED Display & Hardware Controls

Features a sharp 0.96-inch OLED screen paired with a multi-function rotary encoder. Adjust volume, switch gain stages, and select digital filters directly on the device with intuitive control.

Multi-Platform Compatibility: UAC2.0 / UAC1.0 & SPDIF Out

UAC 2.0 Mode: Plug-and-play high-resolution audio for iOS, Android, Windows, macOS, and Linux. Supports up to PCM 768kHz and Native DSD512.
UAC 1.0 Mode: Instant compatibility with gaming consoles like the Nintendo Switch 2, PS5, and PC for low-latency, immersive gaming audio.
SPDIF Output: The 3.5mm port supports digital optical SPDIF output up to PCM 768kHz to turn your phone into a high-end digital transport.

Technical Specifications

DAC Architecture	24-bit Discrete 8-Channel R2R Ladder Network
Resistors	312x Viking Thin-Film Low Temp-Drift Resistors
Master Clock	2x Accusilicon Femtosecond Oscillators
Amplifier Circuit	2x TI Dual Op-Amps + 4x BUF634A Buffers
Output Power (Balanced 4.4mm)	800mW + 800mW @ 32Ω
Output Level	5.2Vrms (High Gain) / 2.6Vrms (Low Gain)
Outputs	4.4mm Balanced, 3.5mm Single-Ended (SPDIF Coax/Optical Out capable)
THD+N	0.004%
SNR / Dynamic Range	122dB / 123dB
Channel Separation	124dB
Output Impedance	0.5Ω
Audio Formats	PCM up to 768kHz / Native DSD512
Power Regulation	Linear Technology LT3042 LDO (0.8µV Noise, 100dB PSRR)
Dimensions & Weight	61 × 34.6 × 15 mm \| 45 grams
Build Material	CNC Aluminum Alloy + Tempered Glass (Front & Back)