Moonriver 404 SPDIF DAC Expansion Module

The Moonriver 404 SPDIF DAC expansion module fits the Moonriver 404 or 404 Reference internally with a digital input and a high-quality D/A converter.

If you want to connect a CD player, a TV or a network player with a coaxial or optical digital output, this module gives you a genuine converter right inside the amplifier – no separate DAC chassis and no extra power supply on the power strip.

Why this module?

Because an ESS Sabre 9000 series converter chip together with its own generously sized capacitor bank delivers clean digital playback without needing a second box in the rack. The module shares its power supply and chassis shielding with the amplifier – a separate DAC device in this class costs noticeably more.

What you get

A digital SPDIF input (coaxial or optical, depending on the version) supporting PCM signals up to 192 kHz/24 bit. That comfortably covers the vast majority of CD players, TVs and older digital sources.

Who is the module suited for – and who isn't it for?

Straight talk: for anyone who wants to connect a single digital source with a classic SPDIF output. If you feed your music primarily via USB from a computer or streamer, or need DSD formats, the USB DAC module serves you better – SPDIF and USB can't be installed at the same time, you choose one variant.

Our verdict

For anyone with a digital SPDIF source, an unfussy, clean solution that doesn't overload the 404. Tell us which source you want to connect, and we'll check whether SPDIF or USB is the better choice for you.

Technical data

• Type: internal digital expansion card for Moonriver 404 / 404 Reference
• Converter chip: ESS Sabre 9000 series (ESS Sabre 9010)
• Digital input: S/PDIF
• Supported format: PCM up to 192 kHz / 24 bit
• Power supply: own capacitor bank, fed from the power supply of the 404 / 404 Reference
• Installation: by our in-house technician
• Compatible with: Moonriver 404 and 404 Reference (only one digital module at a time)
• Warranty: 3 years (manufacturer)

Frequently asked questions

Can I install both the SPDIF and USB DAC module at the same time?

No, the 404 has only one slot for a digital module. You choose between SPDIF (classic digital sources like a CD player or TV) or USB (computer, streamer) – not both at once.

Which devices can I connect via the SPDIF input?

Anything with a coaxial or optical digital output – classic CD players, many TVs, older network players. The module converts PCM signals up to 192 kHz/24 bit.

Is the module enough for high-resolution streaming formats?

Yes for PCM up to 192 kHz/24 bit. For DSD playback or higher-resolution PCM formats over USB, the USB DAC module is the right choice.

Can I install the module myself?

Installation requires opening the amplifier. We recommend leaving that to our technician – he installs the card and checks it works with your source.

Why buy the Moonriver SPDIF DAC module at HD Zürisee?

Because we'll tell you beforehand whether SPDIF or USB suits your source better, and install the card properly right away. Call us or write on WhatsApp – we advise you in Wädenswil.

Goes well with

A CD player or streamer with a digital output and a matching digital cable.