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NAD C 658 Network Player Preamp BluOS Streaming DAC

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  • Product Description


    Redefining the Architecture of Hi-Fi Playback

    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 analog 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 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

    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, Windows, and Mac OS phones, tablets, and desktop 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.


    • 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
    • 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)
    • 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
    • DAC
    • Supported audio file formats: MP3, AAC, WMA, OGG, WMA-L, ALAC, OPUS
    • High resolution audio formats: MQA, DSD, FLAC, WAV, AIFF
    • Native sampling rates: up to 32bit/192kHz
    • Bit depths: 16 – 24
    • BLUOS
    • 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: luOS – 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)
    • Bluetooth version 4.2
    • Network connectivity: Gigabit Ethernet RJ45, 802.11 b/g/n WiFi
    • Dimensions (W x H x D)”: 17.125 x 3.94 x 16
    • Shipping Weight: 22.3lb
    • MPN: C 658
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