The Matrix Audio ND-1 arrives as a statement of intent: a network DAC and streamer built to sit at the digital heart of a serious system, converting bits into music while giving the enthusiast an unusually complete set of input and output options. Rather than treating streaming as a bolt-on feature, the ND-1 integrates network playback, high-resolution decoding, and precision clocking into a single chassis. What follows is a deep look at how the device is architected and, most importantly, how it connects to and integrates with a real-world listening chain.
What kind of component is the ND-1?
The ND-1 is a network DAC and streamer, meaning it combines two functions that were historically separate boxes. The streamer portion pulls audio off your network or from streaming services and presents it to the internal digital-to-analog conversion stage, which then outputs an analog signal ready to feed a preamplifier or integrated amplifier. Consolidating these roles into one enclosure shortens the digital signal path between the transport and the DAC, which removes an external interface link that would otherwise introduce its own jitter and interface artifacts. For the listener, it also means a single unit to configure, control, and power.
Conversion and Clocking
What DAC chip does the ND-1 use, and why does it matter?
The ND-1 is built around an ESS Sabre DAC stage, a converter family widely respected for its low noise floor and high dynamic range. ESS Sabre parts use a delta-sigma architecture with an internal digital filter and a proprietary jitter-reduction stage, which helps the converter reject timing errors arriving from upstream sources. In practice this class of chip is capable of very high measured performance, with signal-to-noise ratio and total harmonic distortion figures that place the analog output well below the threshold of audibility for noise and nonlinear distortion. The way a designer implements the surrounding analog output stage, power supply, and clocking ultimately determines how much of that theoretical performance survives into the real world.
How does the master clock affect sound quality?
The ND-1 uses a high-precision femtosecond clock to time the conversion process, and clock accuracy is one of the single most consequential factors in digital audio. Jitter, the tiny timing variations in when each sample is converted, smears the reconstructed waveform and manifests as sidebands around musical tones. A femtosecond-class clock has extremely low phase noise, meaning the timing reference is exceptionally stable. When the DAC converts each sample at precisely the correct instant, the result is a lower noise floor around signal peaks and improved retrieval of low-level detail and spatial cues. This is the kind of engineering that separates a competent converter from a genuinely resolving one.
Can you use an external clock with the ND-1?
Yes, the ND-1 provides a 10MHz reference clock input on a BNC connector, allowing you to slave the unit to an external master clock. This is a feature aimed squarely at the experienced enthusiast who already owns or plans to own a high-grade reference clock and wants a single timing source distributed across multiple digital components. The 10MHz standard is common in professional and high-end audio clocking, and the BNC connector provides a 50-ohm coaxial interface appropriate for a clean, reflection-free clock signal. It is worth noting that the onboard femtosecond clock is already excellent, so the external input is best understood as an option for system-level clock synchronization rather than a mandatory upgrade.
Format Support and Decoding
What PCM and DSD formats does the ND-1 handle?
The ND-1 supports high-rate PCM along with native and DoP DSD playback. High-rate PCM means the converter accepts files well beyond the CD standard, so studio-quality high-resolution downloads and library rips pass through without being downsampled. On the DSD side, the ND-1 handles both native DSD, where the one-bit stream is delivered directly to the converter, and DoP, which stands for DSD over PCM. DoP is a transport method that wraps DSD data inside PCM frames so it can travel across interfaces that were not originally designed to carry a native DSD stream, and the DAC then unwraps and plays it as DSD. Having both methods available maximizes compatibility with different source software and transport paths.
Does the ND-1 support MQA?
Yes, the ND-1 supports MQA, the encoding and unfolding scheme designed to deliver high-resolution content in a smaller file. When an MQA stream or file arrives, the ND-1 performs the decoding needed to reconstruct the higher-resolution signal and applies the associated filtering. For subscribers to services that distribute MQA content, this means the ND-1 can render those files at their intended resolution rather than playing only the baseline layer.
Streaming and Network Playback
Which streaming services are built in?
The ND-1 offers integrated access to TIDAL, Qobuz, and Spotify. Because these services are handled within the streamer itself, the audio data travels from your network directly into the ND-1 without needing a separate computer or phone in the signal path. Your control device simply tells the ND-1 what to play, and the unit fetches and renders the stream on its own. This keeps the playback chain clean and avoids the noise and instability that can come from using a general-purpose computer as the transport.
What network playback standards does the ND-1 support?
The ND-1 is Roon Ready and also supports DLNA and AirPlay, covering the three most common ways enthusiasts stream over a network. Roon Ready certification means the unit integrates with a Roon Core as a trusted endpoint, exposing bit-perfect playback and Roon's signal-path reporting. DLNA allows the ND-1 to act as a renderer for any compliant server or controller on your local network, which suits enthusiasts who run their own media servers. AirPlay provides straightforward casting from Apple devices. Together these standards make the ND-1 flexible enough to fit almost any software ecosystem you already use.
How do you control the ND-1?
The ND-1 is controlled through the Matrix Audio MA app, which serves as the primary interface for browsing, playback, and configuration. The app communicates with the streamer over your network, letting you select inputs, manage streaming service accounts, browse your library, and adjust settings from a phone or tablet. Because control is decoupled from the audio stream, using the app does not inject its host device into the playback path; the ND-1 continues doing the actual streaming and conversion work.
Connectivity and System Integration
What analog outputs does the ND-1 provide?
The ND-1 offers both balanced XLR and single-ended RCA analog outputs. The balanced XLR outputs carry the signal differentially, which rejects common-mode noise picked up along the cable and is the preferred connection for longer runs or systems with fully balanced amplification. The single-ended RCA outputs provide the traditional connection that virtually every preamplifier and integrated amplifier accepts. Having both means the ND-1 drops into a balanced or unbalanced system without an adapter, and you can even use them to feed two destinations depending on your configuration.
What digital inputs are available?
The ND-1 accepts USB in both Type B and Type C, along with coaxial, optical, and AES/EBU on an XLR connector, plus I2S delivered as IIS-LVDS over an HDMI connector. This is an unusually comprehensive input array. The dual USB options let you connect a computer or a compatible source using whichever USB connector that device provides, which is a thoughtful nod to newer machines that have moved to Type C. Coaxial and optical (S/PDIF) handle CD transports, older DACs used as transports, and consumer digital sources. AES/EBU on XLR is the professional balanced digital standard, suited to studio-grade transports and longer digital runs. The I2S connection, carried as IIS-LVDS through an HDMI port, keeps the clock and data lines separate rather than multiplexing them the way S/PDIF does, which can reduce jitter when paired with a compatible Matrix Audio transport that uses the same pinout.
Why does having so many inputs matter for integration?
The breadth of inputs turns the ND-1 into a central digital hub rather than a single-purpose streamer, because it can serve as the DAC for every digital source in the system. You can leave the streamer connected to your network while simultaneously feeding a computer over USB, a CD transport over coaxial or AES/EBU, and a matching transport over I2S. Switching among them is a matter of selecting the input in the MA app. For an enthusiast consolidating a collection of digital sources onto one high-quality converter, this eliminates the need for separate DACs or an external digital switcher, and every source benefits from the same femtosecond clock and ESS Sabre conversion stage.
Power Supply and Construction
How does the power supply affect performance?
While the ND-1 consolidates streaming and conversion in one chassis, that integration places demands on the power supply, which must provide clean, low-noise rails to the sensitive analog and clock circuits while the network and digital sections draw their own current. A well-designed supply isolates the noisy digital and network domains from the analog output and clocking domains so that switching activity does not modulate the converter's reference or contaminate the output stage. The payoff of good power supply design shows up as a lower noise floor and better retention of the DAC's inherent dynamic range.
What does the chassis contribute?
The enclosure does more than house the electronics; it provides shielding and mechanical stability that protect the clock and analog stages. A rigid metal chassis shields sensitive circuits from external RF and from the internal switching noise generated by the network and USB sections, and it damps vibration that could otherwise perturb the crystal oscillator at the heart of the clock. For a device whose performance hinges on timing precision, this kind of structural attention is part of the engineering, not merely cosmetics.
How the Measurements Translate to Listening
What should the specifications tell an experienced listener?
Taken together, the ESS Sabre stage, femtosecond clock, and optional 10MHz external reference indicate a design that prioritizes timing accuracy and a low noise floor, the two attributes that most reliably correlate with perceived resolution and soundstage precision. High-rate PCM and both native and DoP DSD support mean the ND-1 will play essentially any library at full fidelity, while MQA and the built-in services cover streaming. The real differentiator, though, is the connectivity: comprehensive digital inputs plus balanced and single-ended outputs let the ND-1 anchor a system for years, adapting as your sources change rather than forcing you to work around its limitations. For the enthusiast, that combination of measured performance potential and genuine system flexibility is what makes the ND-1 worth a close listen.
