Audio-GD R-29 - Single Ended R2R DAC Headpone & Preamplifier
| Brand: Audio-GD |
| Product Type: Amplifiers with DAC, Headphone Amplifiers, Digital Analogue Converters (DAC) |
Audio-GD R-29
Single Ended R2R DAC Headpone & Preamplifier
The Audio-GD R-29 embodies the brand’s purist philosophy: a full discrete design built entirely from carefully matched components, free from op-amps or shortcuts. This approach preserves every detail and dynamic nuance, resulting in a sound that’s natural, powerful, and deeply musical, true to the traditions of high-end audio.
With two independent headphone outputs delivering up to 3800mW at 25Ω, the R-29 drives any headphone with effortless authority and refinement. Its smart front display gives instant access to input selection and DAC configuration, including NOS, 2x, 4x, and 8x oversampling modes, while also indicating the active sample rate.
The relay-based analog volume control provides 100 precise steps (00–99), ensuring perfect channel balance and transparency without any loss of musical detail. Every adjustment feels purposeful and precise, an analog experience refined for the modern era.
The R-29 is not just a DAC, preamp, or headphone amplifier, it’s a complete musical instrument, crafted for those who value emotion, realism, and timeless sound.
Audio-GD Fully Discrete Design
At the heart of every Audio-GD component lies a full discrete design. No op-amps, no shortcuts, only carefully matched individual transistors and resistors working in perfect harmony. This purist approach allows the signal to travel through an entirely analog path, preserving every nuance and dynamic detail of the music.
Each Audio-GD creation is hand-tuned by ear, blending engineering precision with musical artistry, staying true to the timeless ideals of high-end audio.
Two is more than one
Two Headphone Outputs
- Equipped with two independent headphone outputs, it effortlessly drives anything from sensitive in-ears to the most demanding planar magnetics. With a maximum output of 3800mW at 25Ω and exceptionally high RMS voltage, the R-29 delivers both sheer power and refined control.
Display function
LED 2-Lines Display
Audio-GD R-29 features a clear, intuitive front display that puts all essential controls within easy reach. From here, you can effortlessly select inputs and fine-tune the DAC’s performance, choosing between NOS, 2x, 4x, or 8x oversampling modes to shape the sound to your taste. The display also shows the active input and sample rate, giving instant feedback on your digital source.
Volume Control
Analogue relay based volume control
The Audio-GD R-29 uses a relay-based analog volume control with 100 precise steps (00–99), ensuring perfect channel balance and zero signal degradation. Unlike digital attenuation, this fully analog system preserves the music’s dynamics and tonal purity at every listening level. Each volume step is switched by precision relays, offering silent operation and a tactile sense of controll, letting you enjoy your music exactly as it was meant to be heard, without compromise.
TECHNICAL SPECIFICATIONS
S/N Ratio | >115DB |
THD+N | <0.015% |
Gain | L mode : +12DB H mode : +22DB |
Channels imbalance | < 0.05DB |
Frequency Breadth | 20Hz - 20KHz (< - 0.5DB) |
Output Level | Headphone output : 10V RMS Preamp Variable output : 10V RMS DAC Fixed output : 2.5 V RMS |
Headphone amp output power level (Only for headphone over 15 ohms.) | 3800mW/25 ohm 2400mW/40 ohm 950mW/100 ohm 330mW/300 ohm 165mW/600 ohm |
Output impedance | 1 ohm / Headphone output 5 ohm / DAC / Preamp output |
Input Sensitivity | 0.5 Vp-p(75 Ohms, Coaxial) 19 dBm (Optical) |
Support Operate Systems (USB) | Windows, OSX, Linux, ISO |
Support Sampling | USB & IIS : 44.1kHz - 384kHz /32Bit DSD64-512 Coaxial mode: 44.1kHz - 192kHz |
Power Requirement | 1 Version 100-120V AC 50/60 Hz 2 Version 220-240V AC 50/60 Hz |
Idle Power Consumption | 10W |
Package Weight | Approximately 3.3KG |
Dimensions | W240 X L230 X H85 (MM, with feet, Fully aluminium ) |
Accessories | AC power cord X1 USB cable X1 |
(1) RCA Lef/Right line/pre output (2) Coaxial RCA Input (3) USB Audio Class 2.0 input
(4) Power On/Off (5) Mains Inlet & Fuse holder
(6) Firwmare update port (7) HDMI I2S input (PS Audio Compatible)
Audio-GD
Audio-GD is a Chinese high-end audio equipment manufacturer known for its innovative ACSS (Audio-gd Current Signal System) and Diamond Difference designs. Founded in 2004 by Mr. He Qinghua, the company has grown to offer a wide range of products including DACs, preamplifiers, and power amplifiers, all crafted with a focus on high-quality components and hand-built construction. Audio-GD's philosophy emphasizes uncompromising quality, a 10-year repair warranty, and a commitment to delivering natural, detailed, and immersive sound experiences.
Audio-GD is a brand that focuses on delivering high-quality, neutral-sounding audio equipment, often incorporating unique design elements like regenerative power supplies and discrete, balanced circuitry. They are known for their strong build quality and a commitment to providing a transparent and detailed listening experience.
