NAD C 658 BluOS Streaming DAC

Revolutionizing Audio: The NAD C 658 Sets a New Standard in Stereo Components

The NAD C 658 is a new kind of stereo component that simultaneously changes preconceptions and opens new possibilities for audio reproduction. There has never been a component offering such a rich palette of both new and proven technology. Bold statements?

The NAD C 658 transcends traditional audio components with its seamless integration of cutting-edge technology and user-centric design. At its core, the ESS Sabre DAC with MQA decoding delivers pristine sound quality, allowing you to experience your favorite tracks with breathtaking clarity. Meanwhile, the innovative Dirac Live Room Correction tailors the listening environment, optimizing acoustics for an unparalleled audio experience that adapts to your space. With BluOS Network Streaming, you gain access to an extensive library of high-resolution music, while dual-band Wi-Fi and 2-way Bluetooth aptX HD ensure flawless connectivity. The inclusion of multiple inputs and outputs, including a balanced preamp output and customizable expansion slots, means the C 658 is not just a component; it’s a versatile hub that evolves with your audio needs, bringing your music to life like never before.

Features:

• BluOS Network Streaming
• ESS Sabre DAC with MQA decoding
• Dirac Live Room Correction
• MM Phono Input
• 2 x Line Inputs
• 2 x Optical Inputs
• 2 x Coax Inputs
• Balanced Preamp Output
• Preamp and Stereo Subwoofer Outputs (Single-ended)
• High Current Headphone Output
• Gigabit Ethernet
• Dual Band Wi-Fi a/c/n
• 2-way Bluetooth aptX HD
• 2 x MDC Slots for Future Expansion
• USB socket for adding optional wireless output module
• IR In with Learning Function
• Trigger Out/In

Specifications:

NAD BluOS Streaming DAC C658:
Type: Streaming DAC with Preamp and Phono Stage

Line Input, Pre-Out Performance:
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: 22 kΩ + 100pF
Maximum Input Signal: >4.5Vrms (ref. 0.1% THD)
Output Impedance: Source Z + 240 Ω
Input Sensitivity: 93mV (ref. 500mV out, Volume maximum)
Frequency Response: ±0.3dB (20Hz – 20kHz)
Maximum Voltage Output: >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 Performance:
THD (20Hz – 20kHz): <0.01% at 2V out
Signal-to-Noise Ratio: >84dB (200Ω source; A-weighted), >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 Performance:
THD (20Hz – 20kHz): <0.005% at 1V out
Signal-to-Noise Ratio: >110dB (32Ω loads; A-WTD, ref. 2V out, unity gain)
Frequency Response: ±0.3dB (20Hz – 20kHz)
Channel Separation: >>60dB at 1kHz
Output Impedance: 6 Ω

DAC Section:
Supported Audio File Formats: MP3, AAC, WMA, OGG, WMA-L, ALAC, OPUS
High Resolution Audio Formats: MQA, FLAC, WAV, AIFF
DSD Playback: Supports converted DSD playback via BluOS desktop app (only)
Native Sampling Rates: up to 32bit/192kHz
Bit Depths: 16 – 24

BluOS Features:
Supported Operating Systems: Microsoft Windows XP to current, Mac OS X versions
User Interface: BluOS – Free Android and iOS App
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

Connectivity:
Bluetooth: Bluetooth aptX HD wireless built-in, Two-Way (Transmit and Receive)
Network: Gigabit Ethernet RJ45, WiFi 5 (802.11 b/g/n)
Analog Inputs: Line Input, Phono Input (MM)
Headphone Output: 6.35mm (1/4") jack
Digital Outputs: Pre-Out (RCA)
Other Outputs: Subwoofer Output (RCA)

General:
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)