The NAD C 658 is a novel stereo component that opens up entirely new possibilities for audio playback. With its two optical and two coaxial digital inputs as well as analog high-level inputs, the preamplifier is not only well-equipped for playing back all classic music sources, but also for all modern and future media: The integrated Bluetooth® module not only receives music streams from a smartphone or tablet in the highest aptX™ HD quality, but also transmits them to another Bluetooth® receiver, such as wireless headphones. Via BluOS™, the C 658 connects to the home LAN or WLAN network as well as online streaming services, internet radio stations, and other BluOS™ players or music servers registered on the network. But that's not all: at the rear of the preamplifier, there are two MDC slots available to accommodate modules for connecting HDMI A/V sources or future technologies. And to ensure the stereo system always sounds optimal, the integrated Dirac Live® room correction precisely tunes the sound parameters of the C 658 to the acoustics of the listening room.

INNOVATIVE MUSIC HUB WITH BLUOS™

BluOS™ – Multiroom streaming in HD quality

BluOS™ is an innovative, wireless system that allows you to stream music throughout your entire home. The associated user interface is one of the few solutions in the world capable of streaming uncompressed high-resolution 24-bit / 192 kHz music data to players integrated into the network. For the transmission of music and the organization of the platform, BluOS™ uses only the local network – and is controlled via the BluOS™ app available for smartphones and tablets or a Windows or Mac computer. Since BluOS™ is multiroom-capable, up to 64 zones can be integrated and controlled either synchronously with one audio stream or individually with different programs at different volumes. Bluesound handles numerous file formats from MP3 to MQA Studio Master quality. Whether streaming music services, your own music library on a hard drive, or internet radio – with BluOS™, you always have access to your favorite music throughout the entire network.

By the way, BluOS™ can also be integrated into several innovative home automation systems, so that in addition to the intelligent control of lighting, heating, and other building technology, the operation of a BluOS™ multiroom system via the smart home panel is also possible. Driver software for systems from manufacturers such as Control4, Crestron, ELAN, iPort, Lutron, Push, RTI, and URC is available for download on the Bluesound homepage (bluesound-deutschland.de).

Dirac Live® – Software for room acoustics and impulse response correction

Dirac Live® is an innovative room correction system whose fundamental function is to calibrate an audio system to the acoustics of the listening room. However, in addition to adjusting specific frequencies, Dirac Live® uses advanced algorithms to analyze the impulse response of the played audio signals. This corrects potential deviations between the impulses contained in the original signal and their reproduction, making the hi-fi system sound more balanced, natural, and spacious. While the NAD M17.2 comes with the full version of Dirac Live® on board, other devices with this feature have the "light" version, which only processes the particularly problematic low frequencies up to 500 Hz. An upgrade to the full version is possible at any time.
Key Features

• BluOS™ network streamer
• ESS Sabre D/A converter with 24-bit / 192 kHz resolution
• Support for the Studio Master format MQA
• Dirac Live® room correction (light version, upgrade optional)
• Integrated bidirectional Bluetooth® aptX™ HD module
• AirPlay 2
• BluOS™ voice control via Siri
• Roon Ready certification
• 2 analog high-level inputs
• Phono MM input
• 2 optical and 2 coaxial digital inputs
• Balanced XLR and RCA preamplifier outputs
• 2 subwoofer outputs
• 2 slots for MDC modules, currently DD HDM 2
• Gigabit Ethernet
• Dual-band WLAN a/c/n
• USB 2.0 port
• High-level headphone output
• Trigger input and output

MQA – Music in Studio Master quality

MQA is not a new file format, but rather an innovative way to package large music files using complex encoding, efficient compression technology, and a digital signature so that even original studio master recordings in 24-bit/192 kHz format can be packaged into comparatively small data packets and made available online. For this purpose, the music data is packaged in any container such as ALAC, FLAC, or WAV. During playback via a decoder integrated into BluOS®, the player fully unpacks the file and returns it to its original format—the Studio Master file—without any loss.

Apple AirPlay 2

The C 658 can be integrated into an Apple network via AirPlay 2 and then selected directly as a playback device for your music stream via your Mac, iPhone, or iPad. And if you have enabled Siri voice control on your Apple device, all it takes is "Hey Siri, play the latest Paul McCartney album" or "Hey Siri, play NDR 2," and your NAD hi-fi system will start playback immediately.

LINE INPUT, PRE-AMP OUTPUT
Total Harmonic Distortion (20 Hz – 20 kHz) <0.005% at 2 V output
Signal-to-Noise Ratio >106 dB (IHF; A-weighted, 500 mV output, unity gain)
Channel Separation >80 dB (1 kHz)
>70 dB (10 kHz)
Input Impedance (R and C) 22 kohms + 100 pF
Maximum Input Level
>4.5 V rms (0.1% THD)
Output Impedance Source Z + 240 ohms
Input Sensitivity 93 mV (500 mV output, volume set to maximum)
Frequency Response ±0.3 dB (20 Hz – 20 kHz)
Maximum Output Level
>4.5 V (0.1% THD)
Tone Controls Treble: >±7.0 dB at 20 kHz; Bass: ±7.0 dB at 60 Hz; Balance: -10 dB
PHONO INPUT, PRE-AMP OUTPUT
Total Harmonic Distortion (20 Hz – 20 kHz) <0.01% at 2 V output
Signal-to-Noise Ratio >84 dB (200 ohm source; A-weighted, 500 mV output)
>76 dB (MM cartridge, IHF; A-weighted, 500 mV output)
Input Sensitivity 1.44 mV (500 mV output, volume set to maximum)
Frequency Response >±0.3 dB (20 Hz – 20 kHz)
Maximum Input Level at 1 kHz >80 mV rms (0.1% THD)
LINE INPUT, HEADPHONE OUTPUT
Total Harmonic Distortion (20 Hz – 20 kHz) <0.005% at 1 V output
Signal-to-Noise Ratio
>110 dB (32 ohm load; A-weighted, 2 V output, unity gain)
Frequency Response ±0.3 dB (20 Hz – 20 kHz)
Channel Separation >60 dB at 1 kHz
Output Impedance 6 ohms
D/A CONVERTER
Supported Data Formats
MP3, AAC, WMA, OGG, WMA-L, ALAC, OPUS
Supported Hi-Res Data Formats MQA, FLAC, WAV, AIFF, converted DSD playback via the BluOS Desktop App (only here)
Sampling Rate up to 32-bit/192 kHz
Resolution 16 – 24-bit
BLUOS
Supported Operating Systems Network music playback from the following desktop operating systems: Microsoft Windows XP, 2000, Vista 7-10, Apple Macintosh 7-10
Mobile Operating System BluOS™ – Free Android and iOS app available online from the Google Play Store and Apple App Store
Supported Cloud Streaming 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® Bluetooth® aptX™ HD
Bluetooth® Connectivity Bidirectional (transmit and receive)
Network Gigabit Ethernet RJ45
Wi-Fi 5 (802.11 b/g/n)
DIMENSIONS AND WEIGHT
Dimensions (W x H x D)** 435 x 100 x 405 mm
Shipping Weight 10.1 kg

Herstellerangaben:

Lenbrook Industries Ltd.
633 Granite Court
Ontario
L1W 3K1 , Pickering
Canada
blokhifi@lenbrook.com

Verantwortliche Person:

DALI GmbH
89 Berliner Ring
64625 , Bensheim
Germany
service@nad.de