Atlas Tech Specs
Front Panel
| Instrument Inputs | 2 x 6.3mm mono jack sockets, auto-select to analogue inputs 1 & 2 when plugged |
| Headphone Outputs | 2 x 6.3mm stereo TRS Jacks, each with illuminated volume control |
| Master volume | Assignable encoder / push switch with halo indication |
| Standby button | with standby indicator (also flashes when unit is in ‘identify’ mode) |
| Indication: | |
| Level Meters | 10 x multi-segment bargraphs with overload indication, 8 for analogue, 2 for digital, assignable to inputs or outputs |
| Input selection | Indicate mode of analogue inputs 1-8 as Mic / line / inst with phantom power indication for mic mode |
| Overkiller | For every analogue input, lit when Overkiller limiters are acting |
| Digital Input | indicators for digital input unlocked and SRC (sample-rate converter) selected |
| Digital Output | indicator for SRC (sample-rate converter) selected |
| Sync | Master indicator, lit when interface is providing system sync |
Rear Panel
| 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) |
| 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) |
| 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 |
Software Support
| 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. |
Analogue Line Inputs
| Configuration | Electronically balanced, with fully-balanced analogue signal path |
| Input Sensitivity | Switchable ‘+4dBu’ (0dBFS = +18dBu) or ‘-10dBV’ (0dBFS = +6dBu) |
| Input Impedance | 14.5kΩ |
| Unbalanced Mode | Automatic |
| Total harmonic distortion | -117dB (0.00014%, -0.1dBFS) |
| THD+N | -111dB (0.00028%, -0.1dBFS) |
| Dynamic Range | 116dB (-60dBFS) |
| Gain Accuracy | ±0.05dB |
| LF roll-off | -0.05dB at 8Hz; -3dB at <1Hz |
| HF roll-off | fs = 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 |
| CMRR | 20Hz..20kHz: >70dB |
| Inter-channel cross-talk | 1kHz: <140dB; 20Hz..20kHz: <-120dB |
| Inter-channel phase | 10Hz..5kHz: ±0.25°, 5kHz..20kHz: ±1.0°, 20kHz..50kHz: ±2.0°, |
| Overkiller | Progessive limiter, auto-aligning, selectable per channel |
| Impact Filter | High-pass filter, -3dB at 80Hz, 40dB/decade (selectable for channels 1-4; whether in line, mic or instrument mode) |
| RIAA de-emphasis filter | Response accuracy: ±0.22dB at fs=44.1kHz; ±0.14dB at fs=48kHz; ±0.015dB at other sample rates |
| M-S matrix | Allows direct connection of mid-side mics, or non-matrix mic-preamps (selectable for channels 1-4; whether in line or mic mode) |
Microphone Preamplifiers
| Configuration | Electronically balanced, with fully balanced analogue signal path |
| Gain | 10dB to 65dB in 1dB steps (0dBFS = -56dBu to -1dBu) |
| Gain accuracy | ±0.05dB |
| Input impedance | 5.5kΩ |
| 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-off | As per analogue line input data (dependent on fs) |
| CMRR | 50Hz/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 |
Instrument Preamplifiers
| Configuration | Unbalanced, high impedance buffer |
| Gain | 10dB to 65dB in 1dB steps, 18dB pad (0dBFS = -38dBu to 17dBu) |
| Gain accuracy | ±0.05dB |
| Input impedance | 1MΩ |
Analogue Outputs
| Configuration | Electronically balanced, with fully-balanced analogue signal path |
| Output amplitude | Switchable ‘+4dBu’ (0dBFS = +18dBu) or ‘-10dBV (0dBFS = +6dBu) |
| Output impedance | 100Ω balanced, 50Ω unbalanced |
| Unbalanced mode | Automatic, with bootstrapping level compensation |
| Total harmonic distortion | -107dB (0.00045%, -1dBFS) |
| THD+N | -106dB (0.00050%, -0.1dBFS) |
| Dynamic range | 115dB (-60dBFS) |
| Gain accuracy | ±0.05dB |
| LF roll-off | -0.05dB at 8Hz, -3dB at <1Hz |
| HF roll-off | fs = 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-talk | 1kHz: <135dB; 20Hz..20kHz: <-120dB |
| Inter-channel phase | 10Hz..5kHz: ±0.4°, 5kHz..20kHz: ±0.25°, 20kHz..50kHz: ±0.5°, |
Digital Inputs
| Formats supported | S/PDIF (RCA or TOSLINK), ADAT, ADAT S/MUX (TOSLINK) |
| Sample rates supported | S/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 Status | ignored |
| Word-length | 24 bit |
| AES3 operation | via S/PDIF RCA, using RCA-XLR adaptor |
| Sample-rate converter (SRC) | Selectable at S/PDIF input; allowing input at any sample rate |
| Bit transparency | Maintained (allows recording of Dolby or DTS streams) |
Digital Outputs
| Formats supported | S/PDIF (RCA or TOSLINK), ADAT, ADAT S/MUX (TOSLINK) |
| Sample rates supported | S/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 Status | Full implementation, Consumer (S/PDIF) or professional (AES3) |
| Word-length | 24 bit, or reduction to 16 bits using flat TPDF dither or Prism Sound SNS (Super Noise Shaping – four alternative shapes available) |
| AES3 operation | via S/PDIF RCA, using RCA-XLR adaptor |
| 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 transparency | Maintained in 24 bit mode (allows playback of Dolby or DTS streams to external decoder) |
Synchronization
| System sample rates | 44.1 / 48 / 88.2 / 96 / 176.4 / 192kHz |
| Sync sources: | |
| Master | local, Wordclock, DI (S/PDIF input) or ADAT |
| Slave | bus 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; |
Physical
| Form factor | 2U 19inch rack mountable (rubber feet and rack ears supplied) |
| Dimensions | Table top (inc feet): Rack-mount (inc ears): |
| Power: | 90-250VAC, 50/60Hz internal power supply IEC 6A connector |
| Power consumption | 35W |
| Fuse rating | 0.5A(T), 20mm, ceramic |
| Weight: | 5kg |
| Operation ambient conditions | 0 to 35°C, 85% maximum relative humidity |
Supplied Accessories
| IEC mains lead | x 1 |
| 19″ Rackmount ears | x 2 (pair) |
| Allen key (for rack ears) | x 1 |
| USB lead | x 1 |
MDIO Expansion Cards
| MDIO-PTHDX Cards | Click Here To Find Out More |
| MDIO-DANTE Cards | Click Here To Find Out More |
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.
