851N
azur
17
D/A Converters
Twin Analog Devices AD1955. Operating at
384kHz sample rate, 24-bit, current output.
Up-sampling DSP
Analog Devices SHARC ADSP-21261
(150MHz MCU, 32bit, 900MFLOPS)
Up-sampling Algorithm /
ATF2; Up-samples to 384kHz/24-bit.
Digital Filter
Filters: Linear Phase, Minimum Phase, Steep
Analogue filter
2-pole differential Bessel with DC servo (for
both Balanced and Line analogue outputs)
THD+n @ 1kHz, 0dBFS
< 0.0006%
THD+n @ 20kHz, 0dBFS
< 0.0013% (measured 22Hz – 80kHz
bandwidth)
Frequency Response
+/- 0.1dB* (20Hz – 20kHz)
-0.5dB* @ 47kHz typ
Output level
Line:
2.2Vrms
Balanced:
4.4Vrms
Signal to Noise ratio
-110dBr (un-weighted)
Total correlated jitter
< 80psec
Crosstalk @ 1kHz, 0dBFS
< -120dB
Crosstalk @ 20kHz, 0dBFS
< -110dB
Digital outputs
S/PDIF Co-axial, Toslink Optical, AES3/EBU:
Linear PCM 32kHz-192kHz sample rate,
16-24 bits.
Digital Inputs
S/PDIF Co-axial, Toslink Optical, AES3/EBU:
PCM 32kHz-192kHz sample rate, 16-24 bits.
USB Audio (streaming):
Linear PCM 32kHz-192kHz sample rate, 16-
24 bits , or DSD (at 64x rate only)
Audio Formats
WAV containing uncompressed
PCM 16-24 bit 32-192kHz
FLAC containing losslessly compressed
PCM 16-24 bit 32-192kHz
Apple Lossless (ALAC) containing losslessly
compressed PCM 16-24 bit 32-192kHz
AIFF containing uncompressed
PCM 16-24 bit 32-192kHz
Microsoft
®
Windows Media
TM
Audio
(WMA 9 Standard) 32-320kbps
MP3 (CBR or VBR) 16-320kbps
AAC, HE AAC and AAC+
(CBR or VBR) 16-320kbps
OGG Vorbis 32-320kbps
Streaming Protocols
RTSP (Real Time Streaming Protocol)
MMS (Microsoft Media Server Protocol)
HTTP (Hyper Text Transfer Protocol)
Playlist
ASX (Microsoft® playlist format) M3U, PLS
Wi-Fi
IEEE 802.11 b/g or n
(2.4GHz connection used only)
Wi-Fi Encryption
WEP, WPA, WPA2
Ethernet
IEEE 802.3, 10 Base-T or 100 Base-T
USB power
4 x USB 2.0 'A' type sockets
Rear 1 (Wi-Fi): Current limit 1A
Rear 2+3: Shared current limit 1A
Front: Current limit 1A
File systems
FAT32, NTFS
Mains inlet voltage
Dependent on regional configuration:
230V AC (+/-10%), 50/60Hz or
100/115V AC switchable (+/-10%), 50/60Hz
Technical specifications
(Audio files over Ethernet,
Wi-Fi or attached USB
storage device)
Standby consumption
<0.5W
Max power consumption
30W
Dimensions
85 x 430 x 305mm
(3.4 x 16.9 x 12.2")
Weight
8.1 Kg (17.8lbs)
* Steep filter disabled
* iRadio/Streaming Services are output as 16-bit data at the appropriate sample
rate for the decompressed data. The sample rate will be 32kHz, 44.1kHz or 48kHz
depending on the streams sample rate.
Incoming streams of less than 32kHz sample rate cannot be output over S/P DIF
/Toslink.
For compressed streams the true resolution of the audio is of course limited by
the encoding.
For Media content from local drives or UPnP this outputs in its native resolution of
16/24-bit, 32kHz 44.1kHz 48kHz or 96kHz with bit for bit transfer.
