NAD C 658 BluOS Streaming DAC

Brand: NAD
Model Number: C 658
UPC: 5703120210254
Model Number: C 658
UPC: 5703120210254

NAD C 658 BluOS Streaming DAC

  • BluOS High-Res Streaming
  • Built in Phono Input
  • 2 Way Bluetooth
  • Dual Band WiFi
  • Expandable with MDC Cards
  • Wireless Headphone Compatible
  • Preamplifier, Digital to Analog Converter & BluOS Streamer All In One
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Product Description

Features & Specifications



NAD C 658 BluOS Streaming DAC

Redefining the Architecture of Hi-Fi Playback

The C 658 creates 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. 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 STBs). 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 legacy analog components.

BluOS™ Enabled

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, Windows, and Mac OS phones, tablets, and desk top devices. BluOS also supports all major smart home controllers and is available in a wide range of products making it easy to create a whole house audio system with the C 658 at its heart.

Traditional NAD Performance and Value

The C 658 is part of our 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 aluminum 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.

High Resolution in Every Detail

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 spec. All preamp functions are executed in the digital domain including the same wide range non-truncating digital volume control used in our Masters Series components. This offers an incredibly short analog signal path that, rather uniquely, is identical for all volume settings.

Make the Speakers Disappear (It’s Not Magic)

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.

Master Quality Authenticated

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 the 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.


Brand NAD   Model NAD C 658
Model: NAD C 658
Product: NAD C 658 BluOS Streaming DAC
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


– Supported Audio File Formats : MP3, AAC, WMA, OGG, WMA-L, ALAC, OPUS
– High Resolution Audio Formats : MQA, FLAC, WAV, AIFF, Supports converted DSD playback via the BluOS desktop app (only)
– 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 : Spotify, Amazon Music, TIDAL, Deezer, Qobuz, HDTracks, HighResAudio, Murfie, JUKE, Napster, Slacker Radio, KKBox, Bugs
– Free Internet Radio : 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 ac/n)


– Width : 435 mm ( 17 1/8" )
– Height : 100 mm ( 3 15/16" )
– Depth : 405 mm ( 16" )


– 10.1 kg ( 22.3 lb )



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