NAD C 658 | BluOS Streaming DAC Preamplifier | 3 YEAR WARRANTY

Name: NAD C 658 | BluOS Streaming DAC Preamplifier | 3 YEAR WARRANTY
Brand: NAD
SKU: 61275
Price: 1990.00 CHF
Availability: BackOrder

Reference 61275

CHF1,990.00 Tax included

Supplier stock – typically 4 to 7 days

The NAD C 658 is a Classic Series streaming DAC preamplifier with built-in BluOS and Dirac Live room correction. It combines high-resolution streaming, an MM phono input, balanced outputs and two MDC slots for future expansion.

Description
Product Details

Hand adjusting the preamplifier volume while music plays from a smartphone

High-resolution BluOS streaming

The C 658 has BluOS built in: Spotify, TIDAL, Qobuz, Amazon Music, Deezer and the music libraries on your network open from the BluOS Controller app on Android or iOS. FLAC, WAV, AIFF and MQA files play at up to 32-bit/192 kHz, and the unit joins a BluOS multi-room system. Bluetooth aptX HD works both ways, receiving music from a phone or sending it to another Bluetooth device.

Preamplifier in a white cabinet beside an amplifier, below a turntable

Connections for the whole system

An MM phono input takes the turntable, alongside two RCA line inputs, two coaxial and two optical inputs. On the output side, the C 658 offers balanced XLR and single-ended outputs to a power amplifier, plus a subwoofer output whose digital crossover is set with bass management. Gigabit Ethernet, dual-band Wi-Fi, trigger and IR connections make it easy to fit into an existing installation.

NAD C 658 from the front, display showing the Optical 1 input

Fully digital processing

Whatever the input, the signal stays in the digital domain up to the conversion stage, and the volume is also adjusted digitally. On the line input, this low-noise path is specified at a signal-to-noise ratio above 106 dB and distortion below 0.005 %. Two MDC slots allow an HDMI or USB-DSD module to be added later.

Preamplifier on a wooden cabinet between two speakers on stands

Dirac Live room correction

The Dirac Live Limited Bandwidth licence and calibration microphone are included, so the measurement corrects the room response up to 500 Hz. Dirac works on both timing and frequency to reduce room-induced resonances and tighten the stereo image. The licence can be upgraded to Dirac Live Full Frequency, and Dirac Live Bass Control is available as an option to optimise a subwoofer.

Reference 61275

Data sheet

Product Type: Streamer Preamplifier
Features: Free BluOS Controller app for Android and iOS
Learning function for a second remote control
Tone controls: treble ±7.0 dB at 20 kHz, bass ±7.0 dB at 60 Hz, balance -10 dB
Two MDC slots for optional modules (HDMI, USB-DSD)
USB ports: USB-A
Brand: NAD
Integrated DAC: Yes, 32-bit/192 kHz
Headphone output: Headphone output, output impedance 6 ohms
Yes
WiFi: Wi-Fi 5
Audio outputs: RCA Pre-out
Subwoofer Output
XLR
Digital inputs: 2 x optical, 2 x coaxial
Analog inputs: 2 x RCA
Multiroom: BluOS
Phono inputs: Yes (MM)
Color: Graphite
Streaming services: Free internet radio: TuneIn Radio, iHeartRadio, Calm Radio, Radio Paradise
Spotify (Spotify Lossless supported), Spotify Connect, Amazon Music, TIDAL, Deezer, Qobuz, Qobuz Connect, HDTracks, HighResAudio, Murfie, JUKE, Napster, Slacker Radio, KKBox, Bugs
Resolution: 16 – 24-bit
Connectivity: Two-way Bluetooth
Audio format: MP3, AAC, WMA, OGG, WMA-L, ALAC, OPUS
Hi-Res Audio: MQA, FLAC, WAV, AIFF, DSD converted via the BluOS desktop app only
Series: Classic
Operating system (OS): BluOS
Wireless transfer: Bluetooth aptX HD
Network connectivity: Gigabit Ethernet RJ-45
Connections: IR input and output
Trigger input and output
Sound correction technology: Variable crossover
Room correction: Dirac Live
Dirac Live Bass Control (optional licence)
Dirac Live Limited Bandwidth (licence and calibration microphone included, correction up to 500 Hz), upgradeable to Full Frequency
Signal-to-noise ratio: Headphone output: over 110 dB (32 ohm load, A-weighted, ref. 2 V output, unity gain)
Line: over 106 dB (IHF, A-weighted, ref. 500 mV output, unity gain)
Phono: over 84 dB (200 ohm source), over 76 dB (MM cartridge, IHF), A-weighted, ref. 500 mV output
Power consumption: Less than 0.5 W in standby
Frequency response: Headphone output: ±0.3 dB (20 Hz – 20 kHz)
Line: ±0.3 dB (20 Hz – 20 kHz)
Phono: ±0.3 dB (20 Hz – 20 kHz)
Niveau de sortie: Pre-out: over 4.5 V (IHF load, ref. 0.1 % THD)
Séparation des canaux: Headphone output: over 60 dB at 1 kHz
Line: over 80 dB (1 kHz), over 70 dB (10 kHz)
Distortion (THD): Headphone output: less than 0.005 % at 1 V output (20 Hz – 20 kHz)
Line: less than 0.005 % at 2 V output (20 Hz – 20 kHz)
Phono: less than 0.01 % at 2 V output (20 Hz – 20 kHz)
Width: 43.5 cm
Depth: 40.5 cm
Height: 10.0 cm
Unit weight: 10.1 kg