The NuPrime DAC-9X is a half-width digital-to-analog converter. Designed for studio or home hi-fi use, it can also serve as the heart of a compact audio system.
At the heart of the DAC-9X, two ESS Technology ESS9028Q2M chips operate in a dual-mono configuration, each dedicated to one channel. This approach, uncommon in this price range, delivers particularly refined channel separation and a signal-to-noise ratio exceeding 110 dB. NuPrime’s engineers complemented this solid foundation with their own SRC IC chip, developed in collaboration with a semiconductor manufacturer to provide sophisticated DSP processing. Incoming signals are oversampled to megahertz frequencies before being down-converted to the target frequency, a technique that drastically minimizes jitter and distortion.
Ultra-low-noise JFET transistors in the input stage ensure a remarkably low noise floor, while professional-grade Vishay capacitors are strategically positioned in critical areas of the audio circuit. Vishay MELF film resistors contribute to sonic transparency, and the traditional linear power supply, with its toroidal transformer, avoids the compromises of switching supplies while maintaining particularly low standby consumption.
The DAC-9X’s dimensions (235 × 281 × 60 mm, feet included) reflect a desire to create a truly versatile device. The aluminum chassis, available in black or silver, exudes quality with CNC-machined front panels and solid-milled knobs. NuPrime’s engineers opted for restraint: no flashy display, but tiny backlit perforations that communicate essential information sampling rate, volume level, current playback format without disrupting nighttime listening.
The front panel features a 6.35 mm headphone jack capable of delivering 1,700 mW into 32 ohms with distortion below 0.01%, sufficient to drive the most demanding headphones. A small switch lets you enable or disable volume control, instantly transforming the DAC-9X into a preamplifier. This flexibility supports a variety of system configurations, from a simple DAC connected to an integrated amplifier to a preamplifier directly driving active speakers.
The rear panel reveals the DAC-9X’s ambition: six digital inputs including Type-B USB, coaxial, optical, and two IIS/DSD inputs via HDMI connectors the latter specifically designed for NuPrime digital sources but also accepting I2S streams from other compatible manufacturers. The USB input natively handles streams up to 384 kHz/24-bit and DSD256 on Windows via the ASIO 2.1 driver, while Mac and Linux top out at DSD128 in DoP.
An analog RCA input rounds things out, allowing integration of a turntable (via a phono preamplifier) or any other analog source. Often overlooked on digitally focused DACs, this input maintains remarkable transmission quality here thanks to the carefully designed preamplification circuit.
On the output side, the DAC-9X offers unbalanced RCA (4 Vrms) and balanced XLR (8 Vrms), plus an optical S/PDIF output for digital daisy-chaining. A USB Type-A expansion port allows the addition of NuPrime-compatible wireless receivers, turning the DAC into a Bluetooth or Wi-Fi streaming hub.
The integration of MQA decoding illustrates NuPrime’s commitment to delivering a contemporary product. The front LED changes color depending on the detected stream type: green for an authenticated MQA file, blue for an MQA Studio file approved by the artist or producer, magenta when the device performs the final rendering of an MQA stream. Yellow indicates DSD file playback. This subtle color management informs without distracting, in true NuPrime fashion.
The preamplification circuit deserves special attention. Rather than relying solely on the digital volume control built into the DAC chips, NuPrime opted for a digitally controlled switched-resistor network offering 99 steps of adjustment. This analog dual-mono “shunt to ground” approach ensures no added noise or distortion. Each input has its own memorized gain setting, a valuable feature for balancing levels across disparate sources.
This preamplification capability turns the DAC-9X into the true nerve center of an audio system. Connected directly to a power amplifier or active speakers, it can drive the entire chain with remarkable transparency, eliminating signal breaks inherent to additional cables and connectors.
In listening, the DAC-9X reveals a clear, controlled personality without excessive coolness. The soundstage extends generously in width with imaging precision that lets you pinpoint each instrument. Background vocals, often buried in the mix, emerge with unusual clarity at this price point. The low end remains tight and articulate, without artificial emphasis, while the highs retain their finesse without harshness.
Dynamics, both macro and micro, are delivered with conviction. On complex orchestral recordings, the DAC-9X keeps its composure even during the most demanding crescendos, preserving the individual texture of instruments within the overall mass of sound. This ability to tease apart the threads of a dense musical tapestry while preserving overall coherence testifies to accomplished engineering.
Absolutely. With its variable RCA (4 Vrms) and XLR (8 Vrms) outputs, 99-step analog volume control, and remote, the DAC-9X works perfectly as a preamplifier. This streamlined setup removes a link in the chain, reducing signal break points and potentially sonic coloration.
The front switch toggles between these modes. In fixed mode, the DAC-9X operates like a traditional DAC, leaving volume control to your amplifier. In variable mode, it becomes a preamplifier with volume control. Caution: accidentally switching to fixed mode while using the DAC as a preamp will send maximum signal to your amplification.
These inputs accept I2S and DSD signals from any source compatible with the HDMI wiring standard for I2S audio. However, pinouts may vary by manufacturer. NuPrime guarantees full compatibility with its own players and streamers. For other brands, checking pinout compatibility is recommended.
The microprocessor stores the last volume level used for each input individually. This handy feature can surprise you during initial source changes if levels differ greatly. To standardize, set each input to the desired level the DAC-9X will retain these settings even after power-off.
With 1,700 mW into 32 ohms and 135 mW into 600 ohms, the DAC-9X’s headphone amp suits the vast majority of headphones on the market, including power-hungry planar magnetics. Only a few ultra-demanding models like some HiFiMAN or Abyss headphones might benefit from a more powerful dedicated amplifier.
This USB Type-A port uses a proprietary NuPrime protocol that carries 5V power and S/PDIF data simultaneously. Only NuPrime receivers (BTR-HD, Stream Mini, Omnia WR-1/WR-2) are compatible. For other Bluetooth solutions, use the optical or coaxial input with a standard Bluetooth receiver.
The DAC-9X occupies a unique position by combining features rarely found together: high-resolution DAC, quality analog preamplifier, powerful headphone amplifier, and exhaustive connectivity. This versatility, paired with solid build quality and careful engineering, makes it a coherent choice for anyone seeking a central audio hub without multiplying boxes.
Christian
I am very delighted with the quality of the analog sound after the digital converversion. Mercy beaucoup!
Comment from October 27, 2025 — Experience from October 12, 2025
Jacek
I am satisfied with the sound provided by the Dac 9x. I am trying to make better use of it. I would like the music from my drive to also be played using the Dac 9x. Maybe you could give me some advice.
Comment from January 26, 2025 — Experience from December 08, 2024
Willy
Magical, many possible connections.
Can be used as a preamp, very readable display. Effective headphone output!
Small downside for the remote control, but works well!
Comment from March 24, 2023 — Experience from February 25, 2023
