Cambridge Audio has spent decades refining a particular philosophy: get out of the way of the music. Founded in London, the company built its reputation on source components and amplifiers that prioritize low noise, accurate reconstruction, and system flexibility over gimmickry. The EXN100 sits inside that tradition while pushing it forward into the modern streaming era. It is a network streamer and streaming DAC preamplifier, which means it does two jobs at once: it pulls high resolution audio off your network and local devices, and it converts and controls that signal on the way to a power amplifier or active speakers. For the enthusiast building a digital-first system, understanding exactly what each element does, and why Cambridge chose it, is the point of this deep dive.
Core Architecture and Conversion
What kind of device is the EXN100 and where does it sit in a system?
The EXN100 is a network streamer and streaming DAC preamplifier, meaning it replaces both your source and your preamp in a digital-centric chain. It sits between your network, disc transports, or TV, and a power amplifier or pair of active speakers. Because it has no analog inputs, it is designed as an all-digital hub. Every signal that enters it, whether from Wi-Fi, USB, coaxial, optical, or HDMI, is handled in the digital domain until the final conversion stage. That focus is deliberate. By refusing to bolt on analog input circuitry, Cambridge avoids the extra noise, routing complexity, and cost that would otherwise dilute the purity of the digital path.
Which DAC chip does the EXN100 use and why does it matter?
The EXN100 uses the ESS ES9028Q2M, part of the SABRE32 Reference family. This converter is significant because it is a high performance, low noise design known for excellent linearity and strong jitter rejection. The ESS architecture uses a hyperstream modulator and a proprietary jitter eliminator, which together reduce timing errors that would otherwise smear stereo imaging and add harshness in the treble. In practical listening terms, a well implemented ES9028Q2M tends to deliver a clean noise floor, precise localization of instruments, and natural decay on reverb tails. The chip alone does not guarantee good sound, though. Implementation matters, which is why the surrounding analog output stage, clocking, and power supply are just as important as the part number.
What file formats and resolutions can it decode?
The EXN100 decodes PCM up to 768kHz/32-bit, DSD512, and MQA, along with ALAC, WAV, FLAC, AIFF, WMA, MP3, AAC, and OGG. This breadth means it can natively handle essentially anything in a modern library, from compressed streaming to studio master files. The very high PCM ceiling of 768kHz/32-bit and DSD512 support are less about everyday playback (few recordings exist at those rates) and more about guaranteeing headroom. When a DAC can pass extreme resolutions without downsampling, it signals that the internal filtering and USB receiver are robust, so more common 24-bit/192kHz material passes through comfortably within the device's capability. DSD support matters for SACD rips and native DSD downloads, which some listeners prefer for their smooth, analog-like character.
Connectivity and System Integration
What inputs does the EXN100 offer and what is each one for?
The EXN100 provides USB-B, USB-A, coaxial S/PDIF, optical TOSLINK, HDMI ARC/eARC, and Bluetooth 5.0 with aptX HD, but no analog inputs. Each serves a distinct role. The asynchronous USB-B accepts up to 768kHz/32-bit and DSD512 from a computer, and asynchronous operation is key: the DAC controls the timing clock rather than the computer, which slashes jitter by removing the source from the timing equation. USB-A handles local media such as thumb drives and hard drives. Coaxial and optical S/PDIF connect legacy transports, CD players, and other digital sources, with coaxial generally offering better bandwidth and optical providing full galvanic isolation from ground loops. HDMI ARC/eARC, running up to 192kHz/24-bit, lets the EXN100 receive audio directly from a television, making it a credible hub for a music-first living room.
How does the HDMI ARC/eARC input work and why include it?
The HDMI ARC/eARC input receives audio sent back from a compatible television over a single HDMI cable, at up to 192kHz/24-bit. ARC, or Audio Return Channel, lets the TV pass its audio (from its own apps or connected sources) to the EXN100 without a separate cable run. The enhanced eARC standard carries higher bandwidth, which is why higher resolution stereo streams are supported here. For the enthusiast, this means your streamer doubles as the quality audio path for the TV, so film and broadcast sound benefit from the same DAC and preamp stage as your music, all controlled from one volume interface.
What outputs are available and how should you connect a system?
The EXN100 offers unbalanced RCA and balanced XLR line outputs, plus coaxial and optical digital outputs, with no headphone or subwoofer output. The balanced XLR connection is the preferred choice when your power amplifier or active speakers support it, because a balanced link carries the signal on two inverted conductors and rejects common-mode noise picked up along the cable. That improves clarity over long runs and in electrically noisy rooms. The RCA output covers everything else. The digital outputs let you feed another DAC or a digital signal processor, keeping the EXN100 as a pure transport if you already own a converter you love. Because there is no headphone jack or dedicated sub output, this is unambiguously a component for a full stereo system rather than a desktop or home theater bass setup.
What streaming platforms and network features are built in?
The EXN100 supports dual-band Wi-Fi, Ethernet, AirPlay 2, Chromecast built-in, Roon Ready, Spotify Connect, Tidal Connect, Qobuz, Amazon Music, Deezer, Internet Radio, and UPnP. This is close to comprehensive, and it matters because a streamer's usefulness is defined by how it fits your habits. Roon Ready certification means the device integrates properly into a Roon ecosystem with bit-perfect delivery and remote control. Tidal Connect and Spotify Connect let you cast directly from those native apps, keeping the streaming service's own interface. Dual-band Wi-Fi gives flexibility, but the Ethernet port is the audiophile's choice, since a wired connection avoids the packet retransmission and RF activity that wireless can introduce near sensitive analog circuitry.
How good is the Bluetooth and when would you use it?
The EXN100 uses Bluetooth 5.0 with aptX HD, which is the highest quality mainstream Bluetooth codec for carrying near-CD-quality audio wirelessly. You would reach for it when a guest wants to play something from a phone, or for casual listening where convenience outweighs the last increment of fidelity. aptX HD reduces the compression artifacts of standard Bluetooth by supporting a higher bit depth and bitrate, so the result is noticeably cleaner than basic SBC. It is not the path for critical listening compared with a wired or networked source, but it is a genuinely useful fallback rather than an afterthought.
Control, Display, and Software
What does the display show and how big is it?
The EXN100 has a 4.76 inch IPS TFT display with a resolution of 1280 x 569. IPS panel technology gives wide viewing angles and stable color, so album art, track information, and source status stay legible from across the room and off-axis. A display of this size and resolution can present cover art at meaningful detail rather than a token thumbnail, which matters more than it sounds: for many listeners the artwork and metadata are part of reconnecting with a digital library that would otherwise feel abstract. The screen also confirms sample rate and format, letting you verify at a glance that a stream is arriving at its native resolution.
How does the StreamMagic app work and what does the 7-band EQ do?
The EXN100 is controlled through the StreamMagic Gen 4 app, which includes a 7-band equalizer. The app aggregates your streaming services, local UPnP libraries, and internet radio into one browsable interface, and it manages multiroom grouping and settings. The 7-band EQ is a parametric-style tone control that lets you correct for room modes, speaker balance, or personal preference across seven frequency bands. Used sparingly, it can tame a boomy bass node or lift a slightly dull top end without swapping components. Because the adjustment is applied in the digital domain before conversion, it is repeatable and precise, and you can leave it flat for purist listening whenever you prefer.
Build, Power, and Lineup Position
How is the EXN100 built and what are its dimensions?
The EXN100 measures 430 x 90 x 305 mm (16.9 x 3.5 x 12.0 inches) and weighs 4.1 kg (9 lbs), finished in Lunar Grey. The full-width 430 mm chassis is standard rack sizing, so it stacks cleanly with matching components. A rigid enclosure serves an acoustic and electrical purpose beyond looks: it resists vibration that can micro-modulate sensitive circuits, and a well designed metal case shields the delicate DAC and clock sections from external radio frequency interference. The Lunar Grey finish is part of Cambridge Audio's contemporary EX design language, giving a clean, understated presence that suits a modern component rack.
Why does the power supply design matter here?
The power supply matters because a DAC and preamplifier are only as quiet as the voltage rails feeding them. Digital conversion depends on a clean, stable reference, and any noise on the supply can leak into the analog output as a raised noise floor or subtle distortion. Cambridge Audio's design goal in components like the EXN100 is to isolate the noisy digital and network sections from the sensitive analog output stage, so the streaming and Wi-Fi circuitry does not contaminate the signal at the point of conversion. In listening terms, effective supply and layout design is what you hear as a black background between notes, allowing low level detail and spatial cues to emerge.
Where does the EXN100 fit in the Cambridge Audio lineup?
The EXN100 sits in Cambridge Audio's EX series, positioned as a dedicated network streamer and streaming DAC preamplifier rather than an all-in-one with built-in power amplification. That distinction defines its ideal owner: someone who already has, or wants to choose separately, a power amplifier or active speakers, and who wants the source and preamp stage handled by a focused, high resolution digital component. Compared with Cambridge Audio's integrated and all-in-one streaming products, the EXN100 concentrates its engineering on conversion, control, and connectivity, trusting you to bring the amplification. For an experienced enthusiast who values modularity and the ability to upgrade one link in the chain at a time, that focus is exactly the appeal.
Conclusion
The EXN100 is a purpose-built digital front end that reflects Cambridge Audio's long standing priorities: a capable ESS SABRE32 converter, an all-digital input set anchored by asynchronous USB and eARC, balanced and unbalanced outputs, and a genuinely complete streaming platform wrapped in the StreamMagic app. It asks you to bring your own amplification, and in return it gives you a clean, flexible, high resolution source and preamp in one quiet, well organized box. For the enthusiast assembling a modern separates system around streaming, it is a thoughtfully specified cornerstone.
