NAD C 658 BluOS Streaming DAC


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Overview

The NAD C 658 is a new kind of stereo component, one that at once changes preconceptions and opens new possibilities for audio reproduction. You see, there has never before been a component offering such a rich palette of both new and proven technology.

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.

Features

  • BluOS Network Streaming with MQA Decoding
  • ESS Sabre DAC
  • Dirac Live Room Correction
  • Gigabit Ethernet
  • Dual Band Wi-Fi 5 802.11ac
  • 2-way Qualcomm aptX HD Bluetooth
  • 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
  • Preamp Output
  • Mono Subwoofer Output
  • High Current Headphone Out
  • USB socket for adding optional wireless output module
  • IR In with Learning Function
  • Trigger Out/In

Specifications

LINE IN / 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 IN / 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 IN / 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
GENERAL
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)

Dimensions (W x H x D) 435 x 100 x 405mm (17 1/8 x 3 15/16 x 16)
Shipping Weight 10.1kg (22.3lb)

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