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ENGLISH
All specs are measured according to IHF 202 CEA 490-AR-2008 standard. THD is measured using AP AUX 0025 passive lter and AES 17 active lter.
REFERENCE
SPECIFICATIONS
21
PREAMPLIFIER SECTION
LINE INPUT, AUDIO PRE-OUT
THD (20 Hz – 20 kHz) <0.005 % at 2 V out
Signal-to-Noise Ratio >106 dB (IHF; A-weighted, ref. 500 mV
out, unity gain)
Channel separation >80 dB (1 kHz)
>70 dB (10 kHz)
Input impedance (R and C) 22 kohms + 100 pF
Maximum input signal >4.5 Vrms (ref. 0.1 % THD)
Output impedance Source Z + 240 ohms
Input sensitivity 93 mV (ref. 500 mV out, Volume
maximum)
Frequency response ±0.3 dB (20 Hz - 20 kHz)
Maximum voltage output -IHF load >4.5 V (ref. 0.1 % THD)
Tone controls Treble: ±7.0 dB at 20 kHz
Bass: ±7.0dB at 60 Hz
Balance: -10dB
PHONO INPUT, AUDIO PRE-OUT
THD (20 Hz – 20 kHz) <0.01 % at 2 V out
Signal-to-Noise Ratio >84 dB (200 ohms source; A-weighted,
ref. 500 mV out)
>76 dB (MM cartridge source, IHF;
A-weighted, ref. 500 mV out)
Input sensitivity 1.44 mV (ref. 500 mV out, Volume
maximum)
Frequency response ±0.3 dB (20 Hz - 20 kHz)
Maximum input signal at 1kHz >80 mVrms (ref. 0.1 % THD)
LINE INPUT, HEADPHONE OUT
THD (20 Hz – 20 kHz) <0.005 % at 1V out
Signal-to-Noise Ratio >110 dB (32 ohms loads; A-WTD, ref. 2V
out, unity gain
Frequency response ±0.3 dB (20 Hz - 20 kHz)
Channel separation >60 dB at 1kHz
Output impedance 6 ohms
DAC SECTION
Supported audio le formats MP3, AAC, WMA, OGG, WMA-L, ALAC,
OPUS
Hi-Resolution audio formats MQA, DSD, FLAC, WAV, AIFF
Native sampling rates up to 32bit/192 kHz
Bit depths 16 – 24
BLUOS SECTION
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
macOS versions
User interface mobile operating system BluOS - Free Android and iOS App
available online at Google Play and Apple
App store
Supported cloud services* Amazon Alexa, Amazon Music, Spotify,
Deezer, Qobuz, HDTracks, HighResAudio,
Mure, 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 (Receive and Transmit/
Headphone)
Network connectivity Gigabit Ethernet RJ45
Wi-Fi 5
DIMENSION AND WEIGHT
Gross dimensions (W x H x D) ** 435 x 100 x 405 mm
17 ⁄ x 3 ⁄ x 16 inches
Shipping weight 10.1 kg (22.3 lbs)
* - Supported cloud services and free internet radio are subject to change without notice.
** - Gross dimension includes feet, volume knob and extended rear panel terminals including
installed antennas.
Specifications are subject to change without notice. Check out
www.NADelectronics.com
for
updated documentation or latest information about C 658.
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