Atlas Tech Specs

Instrument Inputs2 x 6.3mm mono jack sockets, auto-select to analogue inputs 1 & 2 when plugged
Headphone Outputs2 x 6.3mm stereo TRS Jacks, each with illuminated volume control
Master volumeAssignable encoder / push switch with halo indication
Standby buttonwith standby indicator (also flashes when unit is in ‘identify’ mode)
Indication:
Level Meters10 x multi-segment bargraphs with overload indication, 8 for analogue, 2 for digital, assignable to inputs or outputs
Input selectionIndicate mode of analogue inputs 1-8 as Mic / line / inst with phantom power indication for mic mode
OverkillerFor every analogue input, lit when Overkiller limiters are acting
Digital Inputindicators for digital input unlocked and SRC (sample-rate converter) selected
Digital Outputindicator for SRC (sample-rate converter) selected
SyncMaster indicator, lit when interface is providing system sync
Mic / Line inputs 8 x combo connectors with XLR sockets for mic input and 6.3mm TRS jack sockets for line input (balanced or unbalanced)
Line outputs 8 x 6.3mm TRS jack sockets (balanced or unbalanced)
Digital inputs 1 x RCA 1 x TOSLINK for S/PDIF or ADAT Optical input; (RCA can operate as AES3 input using XLR-RCA adapter supplied)
Digital output 1 x RCA 1 x TOSLINK for S/PDIF or ADAT Optical output; (RCA can operate as AES3 output using XLR-RCA adapter supplied)
MIDI I/O 2 x 5 Pin DIN sockets (in and out)
Wordclock 2 x BNC sockets, output and input (75R)
USB port 1 x USB 2 port
MDIO Expansion Slot For alternative digital multi-channel I/O
Mains power 3-pin 6A IEC inlet
Mac OS Support OS X 10.5 or later on Intel and Apple M1 silicon
Windows OS Support Windows Vista, 7, 8, 10 & 11
Mac audio driver Core Audio device
Windows audio driver ASIO and WDM
Control Panel applet Graphical user interface for control of single or multiple Atlas units under Mac OS X or Windows.
ConfigurationElectronically balanced, with fully-balanced analogue signal path
Input SensitivitySwitchable ‘+4dBu’ (0dBFS = +18dBu) or ‘-10dBV’ (0dBFS = +6dBu)
Input Impedance14.5kΩ
Unbalanced ModeAutomatic
Total harmonic distortion-117dB (0.00014%, -0.1dBFS)
THD+N-111dB (0.00028%, -0.1dBFS)
Dynamic Range116dB (-60dBFS)
Gain Accuracy±0.05dB
LF roll-off-0.05dB at 8Hz; -3dB at <1Hz
HF roll-offfs = 44.1kHz: -0.05dB at 21.1kHz; -3dB at 22.0kHz
fs = 48kHz: -0.05dB at 23.0kHz; -3dB at 23.9kHz
fs = 96kHz: -0.05dB at 32.0kHz; -3dB at 47.9kHz
fs = 192kHz: -0.05dB at 32.0kHz; -3dB at 78kHz
CMRR20Hz..20kHz: >70dB
Inter-channel cross-talk1kHz: <140dB; 20Hz..20kHz: <-120dB
Inter-channel phase10Hz..5kHz: ±0.25°,
5kHz..20kHz: ±1.0°,
20kHz..50kHz: ±2.0°,
OverkillerProgessive limiter, auto-aligning, selectable per channel
Impact FilterHigh-pass filter, -3dB at 80Hz, 40dB/decade (selectable for channels 1-4; whether in line, mic or instrument mode)
RIAA de-emphasis filterResponse accuracy:
±0.22dB at fs=44.1kHz;
±0.14dB at fs=48kHz;
±0.015dB at other sample rates
M-S matrixAllows direct connection of mid-side mics, or non-matrix mic-preamps (selectable for channels 1-4; whether in line or mic mode)
ConfigurationElectronically balanced, with fully balanced analogue signal path
Gain10dB to 65dB in 1dB steps (0dBFS = -56dBu to -1dBu)
Gain accuracy±0.05dB
Input impedance5.5kΩ
THD+10dB gain: -116dB at -0.1dBFS (0.00016%)
+40dB gain: -110dB at -0.1dBFS (0.00032%)
THD+N+10dB gain: -108dB at -0.1dBFS (0.00040%)
Equivalent input noise (EIN)+30dB gain: -128.5dBu (0Ω source); -126.3dBu (150Ω source)
+40dB gain: -130.9dBu (0Ω source); -127.6dBu (150Ω source)
+50dB gain: -131.2dBu (0Ω source); -127.7dBu (150Ω source)
+60dB gain: -131.4dBu (0Ω source); -127.8dBu (150Ω source)
LF roll-off-0.05dB at 20Hz, -3dB at 5Hz
HF roll-offAs per analogue line input data (dependent on fs)
CMRR50Hz/60Hz: >110dB at all gains
1kHz: >100dB at all gains
20kHz: >90dB at all gains
Phantom power+48V, switchable per channel
Pad-20dB, switchable per channel
ConfigurationUnbalanced, high impedance buffer
Gain10dB to 65dB in 1dB steps, 18dB pad (0dBFS = -38dBu to 17dBu)
Gain accuracy±0.05dB
Input impedance1MΩ
ConfigurationElectronically balanced, with fully-balanced analogue signal path
Output amplitudeSwitchable ‘+4dBu’ (0dBFS = +18dBu) or ‘-10dBV (0dBFS = +6dBu)
Output impedance100Ω balanced, 50Ω unbalanced
Unbalanced modeAutomatic, with bootstrapping level compensation
Total harmonic distortion-107dB (0.00045%, -1dBFS)
THD+N-106dB (0.00050%, -0.1dBFS)
Dynamic range115dB (-60dBFS)
Gain accuracy±0.05dB
LF roll-off-0.05dB at 8Hz, -3dB at <1Hz
HF roll-offfs = 44.1kHz: -0.05dB at 21.4kHz; -3dB at 22.0kHz
fs = 48kHz: -0.05dB at 23.2kHz; -3dB at 23.9kHz
fs = 96kHz: -0.05dB at 32.0kHz; -3dB at 47.8kHz
fs = 192kHz: -0.05dB at 32.0kHz; -3dB at 76kHz
Output balance>50dB
Inter-channel cross-talk1kHz: <135dB; 20Hz..20kHz: <-120dB
Inter-channel phase10Hz..5kHz: ±0.4°,
5kHz..20kHz: ±0.25°,
20kHz..50kHz: ±0.5°,
Formats supportedS/PDIF (RCA or TOSLINK), ADAT, ADAT S/MUX (TOSLINK)
Sample rates supportedS/PDIF (2 channel): 44.1, 48, 88.2, 96, 176.4 and 192kHz
ADAT (8 channel) 44.1 and 48kHz
ADAT S/MUX (4 channel): 88.2 and 96kHz
Channel Statusignored
Word-length24 bit
AES3 operationvia S/PDIF RCA, using RCA-XLR adaptor (supplied)
Sample-rate converter (SRC)Selectable at S/PDIF input; allowing input at any sample rate
Bit transparencyMaintained (allows recording of Dolby or DTS streams)
Formats supportedS/PDIF (RCA or TOSLINK), ADAT, ADAT S/MUX (TOSLINK)
Sample rates supportedS/PDIF (2 channel): 44.1, 48, 88.2, 96, 176.4 and 192kHz
ADAT (8 channel) 44.1 and 48kHz
ADAT S/MUX (4 channel): 88.2 and 96kHz
Channel StatusFull implementation, Consumer (S/PDIF) or professional (AES3)
Word-length24 bit, or reduction to 16 bits using flat TPDF dither or Prism Sound SNS (Super Noise Shaping – four alternative shapes available)
AES3 operationvia S/PDIF RCA, using RCA-XLR adaptor (supplied)
Sample-rate converter (SRC)Selectable at S/PDIF output; output rate can be referenced to Wordclock, DI or local clock at 44.1, 48, 88.2, 96, 176.4 or 192kHz
Bit transparencyMaintained in 24 bit mode (allows playback of Dolby or DTS streams to external decoder)
System sample rates44.1 / 48 / 88.2 / 96 / 176.4 / 192kHz
Sync sources:
Masterlocal, Wordclock, DI (S/PDIF input) or ADAT
Slavebus master (another interface or Host computer)
Local clock accuracy±50ppm
Jitter rejection>60dB / decade above 100Hz
Internal mixer delay
(total analogue in to out)
fs = 44.1kHz: 0.56ms;
fs = 48kHz: 0.52ms;
fs = 88.2kHz: 0.2ms;
fs = 96kHz: 0.18ms;
fs = 176.4kHz: 0.09ms;
fs = 192kHz: 0.08ms;
Form factor2U 19inch rack mountable
(rubber feet and rack ears supplied)
Dimensions

Table top (inc feet):
W: 440mm D: 290mm H: 95mm

Rack-mount (inc ears):
W: 483mm D: 290mm H: 88mm

Power:90-250VAC, 50/60Hz
internal power supply
IEC 6A connector
Power consumption35W
Fuse rating0.5A(T), 20mm, ceramic
Weight:5kg
Operation ambient conditions0 to 35°C, 85% maximum relative humidity
Printed manualx 1
Software CDx 1
IEC mains leadx 1
19″ Rackmount earsx 2 (pair)
Allen key (for rack ears)x 1
USB leadx 1
XLR-F to RCA-M adaptor
(S/PDIF/AES3)
x 1
XLR-M to RCA-M adaptor
(S/PDIF/AES3)
x 1

Except where otherwise stated, audio performance data are RMS, unweighted, 20Hz..20kHz figures, measured at 997Hz, using fs = 96kHz and ‘+4dBu’ sensitivity settings.

In keeping with our policy of continual development, specifications are subject to amendment without notice. E&OE.

All Trade Marks Acknowledged.

The rear panel photograph shows the optional MDIO card fitted.