10 Argent Place Ringwood VIC

NAD C 658 Preamplifier-DAC-Music Streamer


NAD C658 Preamp/DAC/Streamer - Front view

NAD C658 Preamp/DAC/Streamer - Front view

Analogue Preamp With Line & MM Phono Inputs, Digital To Analogue Convertor (DAC), High Resolution BluOS Music Streamer

2-Way aptX HD Bluetooth - Stream Music FROM Your Phone Or TO Your Headphones - Brilliant

DIRAC Live Room Correction Technology Built-In (Coming In 2019)

Availability: In Stock
Delivery: Free Australia Wide Delivery
Your Price $2,599
"Questions? We're here to help you get it right" - Simon
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Product Description

NAD C 658

The C 658 DAC/Streamer/Preamp is part of NAD’s Classic Series of components which have an enviable reputation for giving music lovers more enjoyment for less money. If you want a solid block of hand–crafted aluminium with gold plated accents you’ll need to look elsewhere. If you want state-of-the-art performance and features in a sturdy no-nonsense package then you have the right address.


As we move deeper into the 21st Century the way music is distributed and enjoyed continues to evolve away from physical media to streaming. It also has moved away from analogue to digital. The C 658 has incorporated these fundamental truths to create an entirely new type of component that combines a Network Streamer, a state-of-the art DAC, and many aspects of the traditional Preamplifier into a single highly cost effective package. And thanks to NAD’s exclusive Modular Design Construction, it will keep pace with the latest technology, not yet introduced, but inevitably coming in the future. In fact, an optional HDMI 4k switcher module is available now allowing the best sound from any of the many HDMI sources available (like game consoles and video Set Top Boxes). While the C 658 immediately replaces (or adds) your Streamer, DAC, and Preamp, it also adds many new features you may not be aware of, like a Bluetooth aptX HD transmitter to use with your wireless headphones. The highly flexible outputs allow for a true balanced connection to powered speakers or amplifiers. Single-ended connections for amplifiers and subwoofers are also provided and include an adjustable subwoofer crossover executed perfectly in the digital domain. A highly sophisticated MM Phono input is also included along with line inputs for analogue components.

BluOS™ Enabled

Also on board is BluOS, the most sophisticated high res streaming system available. BluOS natively supports over 15 streaming music services and indexing of over 250,000 tracks from local network sources. The C 658 becomes a node in the BluOS ecosystem allowing high res network streaming to 64 zones and control options for iOS & Android phones & tablets and Windows and Mac OS laptops and computers. BluOS also supports all major smart home controllers and is available in a wide range of products, including Bluesound components and speakers, making it easy to create a whole house audio system with the C 658 at its heart.

High Resolution From Start To Finish

Most NAD components have been high res for 45 years with very wide bandwidth, low distortion, and ultra-low noise. We just never had high res source material to play. With high res digital recording and streaming, combined with advanced technology like MQA, record companies are opening their vaults and releasing Studio Master Quality recordings.

Master Quality Authenticated (MQA) is a revolutionary end-to-end technology built into every BluOS Enabled amplifier to capture and deliver MQA music to your speakers in the purest quality. All BluOS Enabled players and systems include a powerful decoder and audio renderer for the millions of MQA encoded songs, The MQA logo shown in the BluOS app indicates that the unit is decoding and playing an MQA stream or file, and lets you know that you are hearing exactly what the artist recorded and approved in the studio.

The C 658 is pure high res from input to output and features the ESS Sabre 32bit DAC, one of the best performing DACs on the market today with its 118dB Dynamic Range and incredibly low jitter. All preamp functions are executed in the digital domain including the same wide range non-truncating digital volume control used in NAD’s Masters Series components. This offers an incredibly short analogue signal path that, rather uniquely, is identical for all volume settings. Sophisticated active power supplies provide super clean voltages to all circuits to keep noise and distortion at the edge of measurability.

Make Your Speakers Disappear

The C 658 is also the first NAD stereo component to feature Dirac Live room correction*, the most sophisticated and effective room correction available. Dirac corrects the impulse response of your speakers, in addition to the frequency response of your room, for a truly transparent window into the musical performance. When the room resonances are tamed and the transient response is corrected, the result is magical. You have never heard your speakers sound this invisible or this good!

*These features will be implemented via future software upgrades (sometime in 2019). Note: The C 658 will include a license for Dirac Live with the option for advanced users to upgrade to a Dirac Live Full Frequency version. 

Our Take

It is, big breath, an analogue (line & MM phono) preamplifier for use directly into a power amp, it is a stand alone high resolution digital to analogue convertor (DAC). It offers on-board DIRAC live room correction so no matter what your listening room is like, a system based around the C 658 can be custom tailored to suit. And it has the BluOs streaming platform built-in so you can stream high resolution music through your system and also to other BluOs enabled devices around your home, such as the full range of Bluesound streaming components and speakers.

So it has the functionality aspect well and truly sorted. Fortunately, as our very own Simon Finch would tell you, it is also a “tidy little jigger” sound wise, with a well balanced & detailed musical output that is strong on dynamics and with a pleasing sense of naturalness that treats all types of recordings well. Oh, and the price, considering everything you get, is frankly unbelievable. Top marks NAD.


  • Analogue & Digital Preamplifier
  • Digital To Analogue Convertor (ESS Sabre DAC)
  • BluOS Network Streamer with MQA Decoding
  • Dirac Live Room Correction*
    • *This feature will be implemented via a future software upgrade (sometime in 2019). Note: The C 658 will include a license for Dirac Live with the option for advanced users to upgrade to a Dirac Live Full Frequency version.

Line Input, Pre-Out

  • THD (20Hz – 20kHz): <0.005% at 2V out
  • Signal-to-Noise Ratio: >106dB (IHF; A-weighted, ref. 500mV out, unity gain)
  • Channel separation:
    • >80dB (1kHz)
    • >70dB (10kHz)
  • Input impedance (R and C): 22 kohms + 100pF
  • Maximum input signal: >4.5Vrms (ref. 0.1% THD)
  • Output impedance: Source Z + 240 Ohm
  • Input sensitivity: 93mV (ref. 500mV out, Volume maximum)
  • Frequency response: ±0.3dB (20Hz – 20kHz)
  • Maximum voltage output – IHF load: >4.5V (ref. 0.1% THD)
  • Tone Controls:
    • Treble >±7.0dB at 20kHz
    • Bass: ±7.0dB at 60Hz
    • Balance: -10dB

Phono Input, Audio Pre-Out

  • THD (20Hz – 20kHz): <0.01% at 2V out
  • Signal-to-Noise Ratio:
    • >84dB (200 Ohm source; A-weighted, ref. 500mV out)
    • >76dB (MM cartridge source, IHF; A-weighted, ref. 500mV out)
  • Input sensitivity: 1.44mV (ref. 500mV out, Volume maximum)
  • Frequency response: >±0.3dB (20Hz – 20kHz)
  • Maximum input signal at 1kHz: >80mVrms (ref. 0.1% THD)

Line Input, Headphone Out

  • THD (20Hz – 20kHz): <0.005% at 1V out
  • Signal-to-Noise Ratio: >110dB (32 Ohms loads; A-WTD, ref. 2V out, unity gain)
  • Frequency response: ±0.3dB (20Hz – 20kHz)
  • Channel separation: >>60dB at 1kHz
  • Output impedance: 6 Ohms

Digital To Analogue Convertor (DAC)

  • Supported audio file formats: MP3, AAC, WMA, OGG, WMA-L, ALAC, OPUS
  • High resolution audio formats: MQA, FLAC, WAV, AIFF
  • Native sampling rates: up to 32bit/192kHz
  • Bit depths: 16 – 24


  • Supported operating systems: Plays music from network shares on the following desktop operating systems: Microsoft Windows XP, 2000, Vista, 7, 8 to current Windows Operating Systems and Mac OS X versions
  • User interface mobile operating system: BluOS – Free Android and iOS App available online at Google Play and Apple App store
  • Supported cloud services (availability will vary depending on location): Spotify, Amazon Music, TIDAL, Deezer, Qobuz, HDTracks, HighResAudio, Murfie, JUKE, Napster, Slacker Radio, KKBox, Bugs
  • Free internet radio (availability will vary depending on location): TuneIn Radio, iHeartRadio, Calm Radio, Radio Paradise
  • Bluetooth quality: Bluetooth aptX HD wireless built-in
  • Bluetooth connectivity: Two-Way (Transmit and Receive)
  • Network connectivity:
    • Gigabit Ethernet RJ45
    • WiFi 5 (802.11 b/g/n)


  • Gigabit Ethernet
  • Dual Band Wi-Fi a/c/n
  • 2-way Qualcomm aptX HD Bluetooth - stream music FROM your phone or TO your headphones - brilliant
  • 2 x MDC Slots for Future Expansion
  • MM Phono Input
  • 2 x Line Inputs
  • 2 x Optical Inputs
  • 2 x Coax Inputs
  • Balanced Preamp Output
  • RCA Preamp Output
  • Stereo Subwoofer Output
  • High Current Headphone Out
  • USB socket for adding optional wireless output module
  • IR In with Learning Function
  • Trigger Out/In


  • Dimensions (W x H x D): 435 x 100 x 405mm
  • Shipping Weight: 10.1kg
  • Manufacturers Warranty: 2 Years

Note:Features & Specifications Subject To Change Without Notice. E&OE

Additional Information

Additional Information

Name No
Brand NAD
Colour Cool Grey
Shipping Weight (kg) 11.0000
Price Range $2,599


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