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) |