Nad C 658

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.

Specifications

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

DAC

• 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

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
• 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)