Nuprime DAC-8 black

The DAC-8 embodies NuPrime’s philosophy: making high fidelity accessible without compromising sound quality. This digital-to-analog converter packs especially generous connectivity, proprietary signal processing technology, and a preamplifier function into a compact chassis. With eight digital inputs and decoding capability up to 384 kHz/32-bit and DSD256, it turns even modest digital sources into remarkable sonic performances.

Meticulous construction and cutting-edge technology

The DAC-8 sits on NuPrime-designed damping feet and features an anti-vibration chassis combining steel and aluminum plates. This rigorous mechanical construction reflects attention to detail, even on this model positioned in the brand’s accessible range. Available in black or silver finish, the compact 235 × 281 × 55 mm enclosure easily integrates into any audio setup.

Inside, CMS technology dominates the circuit layout. At the heart of the system is the ESS ES9018Q2C chip, a 32-bit converter based on ESS Technology’s Sabre architecture. This chip benefits from special treatment via NuPrime’s proprietary SRC IC, co-developed with an integrated circuit supplier. It upsamples incoming signals to megahertz frequencies before converting them back to the target rate, thereby minimizing jitter and distortion. The power supply features a quality transformer in a dedicated section, while a separate board handles the digital USB-B input. Stereo analog outputs on RCA connectors are switched by a hermetically sealed Takamisawa relay, ensuring signal transmission without degradation.

Versatile connectivity and supported formats

The rear panel reveals a wealth of connections rarely seen in this price range. The eight digital inputs are distributed as follows: two coaxial supporting up to 384 kHz/24-bit and DSD64/128 DoP, two optical accepting up to 192 kHz/24-bit and DSD64 DoP, two HDMI I2S ports for PCM signals up to 384 kHz/32-bit and DSD64 to DSD256, plus two distinct USB connections.

The asynchronous USB-B port is the primary input for computers. On Windows, it supports streams up to 384 kHz/24-bit and native DSD256, while on Mac and Linux, compatibility extends to 384 kHz/24-bit and DSD128 DoP. The USB-A port has an interesting twist: NuPrime configured it to carry both S/PDIF signal and 5V power, allowing the brand’s wireless receivers (Bluetooth aptX or Wi-Fi streaming) to be connected with a single standard cable. This clever approach simplifies integration of wireless options while maintaining digital signal quality.

Microprocessor control stores the settings for each input, including individually adjustable volume levels. This function allows precise equalization of different sources, preventing unpleasant level changes when switching inputs.

Digital preamplifier operation

Beyond its core conversion role, the DAC-8 incorporates a sophisticated digital preamplifier. Volume control is spread across 99 steps of 0.5 dB each, offering a 49.5 dB adjustment range with remarkable precision. This hybrid analog/digital design is an elegant technical solution: the 0.5 dB steps of the digital control are sent directly to the DAC for optimal processing, then the resulting analog signal passes through a low-noise, low-distortion resistor ladder.

This approach fundamentally differs from traditional preamplifiers. Rather than a conventional nonlinear potentiometer that struggles with channel balance at low volumes, or an expensive switched resistor network, NuPrime developed a solution that combines the precision of digital with the musicality of analog. Each input retains its own volume setting in memory, enabling perfect equalization between sources with different output levels.

The RCA output delivers 2 Vrms, a standard level suitable for driving power amplifiers directly or integrating into a traditional system with an integrated amplifier. 12 V trigger inputs and outputs facilitate integration into automated installations.

Sound performance and musical character

Technical measurements show solid performance: frequency response from 20 Hz to 20 kHz with a maximum deviation of ±0.3 dB, signal-to-noise ratio over 110 dB, total harmonic distortion plus noise below 0.005%. These figures reflect rigorous engineering, but it’s in listening that the DAC-8 reveals its qualities.

DSP processing via the proprietary SRC chip produces a balanced, detail-rich sound. The midrange stands out for its density and palpable character, rendering voices with clarity and natural body. The bass reaches deep while maintaining control and articulation. The soundstage expands noticeably compared to entry-level digital sources, with precise placement of virtual sources in both width and depth. Instrumental timbres gain in naturalness and fullness, literally transforming the reproduction of modest digital sources.

Tested with various CD players and computer sources, the DAC-8 consistently elevates the incoming signal. Streams from online platforms take on a new dimension, with coherence, fluidity, and detail retrieval reminiscent of high-end CD players. This improvement isn’t limited to technical aspects: overall musicality advances, making long listening sessions more engaging and less fatiguing.

Technical Specifications

Main Features

• NuPrime SRC IC chip
• Expansion port for Bluetooth receiver and Wi-Fi audio transmitter (optional)
• Microprocessor control with backup memory
• Compatible with native DSD playback via ASIO 2.1 and DoP protocol
• Asynchronous transfer mode
• Volume adjustment with 99 levels in 0.5 dB steps
• Individually adjustable volume for each input to equalize sources

Performance

• Unbalanced RCA outputs: 2 V RMS
• Frequency response: 20 Hz – 20 kHz (± 0.3 dB)
• Signal-to-noise ratio: > 110 dB
• Total harmonic distortion + noise: < 0.005%

Supported Formats

• USB Type B 2.0 high-speed (Windows): up to 384 kHz / 24-bit and native DSD256
• USB Type B 2.0 high-speed (Mac/Linux): up to 384 kHz / 24-bit and DSD128 DoP
• I2S/DSD: PCM 44.1 kHz to 384 kHz / 32-bit and DSD64 to DSD256
• Optical: PCM 44.1 kHz to 192 kHz / 24-bit and DSD64 DoP
• Coaxial: PCM 44.1 kHz to 384 kHz / 24-bit and DSD64/128 DoP
• Extension: PCM 44.1 kHz to 192 kHz / 24-bit

Connectivity

• 8 digital inputs:
  • 2 coaxial
  • 2 optical
  • 2 HDMI I2S
  • 2 USB
    • Asynchronous USB-B DAC 32-bit / 384 kHz, DXD, DSD256
    • USB-A input for transmitter / Bluetooth receiver
• RCA analog output
• 12 V trigger input and output

General Specifications

• Mains fuse: 1 A slow-blow, 250 V
• Dimensions (W × D × H): 235 × 281 × 55 mm (including feet)
• Weight: 2 kg