| Power Sources | ・Power-over-Ethernet (PoE): class 1 (very low power, ≤3.84 watts) per IEEE 802.3af
・External: 10 to 18 volts DC, 0.3 amp maximum at 12 volts DC
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| Network Audio Technology | ・Type: Dante audio-over-Ethernet
・Bit Depth: up to 24
・Sample Rates: 44.1 and 48 kHz
・Number of Receiver (Input) Channels: 2
・Number of Transmitter (Output) Channels: 2
・Dante Audio Flows: 4; 2 receiver, 2 transmitter |
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| Network Interface | ・Type: twisted-pair Ethernet, Power-over-Ethernet (PoE) supported
・Data Rate: 100 Mb/s (10 Mb/s not supported; 1000 Mb/s "GigE" Ethernet not supported unless falls back to 100 Mb/s) |
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| Line Inputs: 2 | ・Type: analog, electronically balanced, capacitor coupled
・Impedance: 20 k ohms, nominal
・Nominal Level: +4 dBu, reference -20 dBFS or 0 dBu, reference -18 dBFS, configurable
・Maximum Level: +24 dBu when configured for +4 dBu nominal, +18 dBu when configured for 0 dBu nominal
・Dynamic Range: >114 dB, A-weighted
・Distortion (THDS+N): <0.002% (-95 dB), measured at -1dBFS, 22 kHz bandwidth
・Frequency Response: +0.0 dB/-0.5 dB, 20 Hz to 20 kHz; 10 kHz low-pass filters disabled
・Low-Pass Filters: -3dB @ 10 kHz, -55 dB @ 20 kHz, configurable on or off in tandem with line output filters
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| Line Outputs: 2 | ・Type: analog, electronically balanced, capacitor coupled, intended to drive balanced or unbalanced loads of 2 k ohms or greater.
・Source Impedance: 200 ohms
・Nominal Level: +4 dBu, reference -20 dBFS, or0 dBu, reference -18 dBFS, configurable
・Maximum Level: +24 dBu when configured for +4 dBu nominal, +18 dBu when configured for 0 dBu nominal
・Dynamic Range: >114 dB, A-weighted
・Distortion (THDS+N): 0.003% (-90 dB), measured at -1dBFS, 22 kHz bandwidth
・Frequency Response: ±0.1 dB, 20 Hz to 20 kHz, 10 kHz low-pass filter disabled
・Low-Pass Filters: -3dB @ 10 kHz, -55 dB @ 20 kHz, configurable on or off in tandem with line input filters |
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| Tone Generator | ・Type: sine-wave
・Frequency: 18 kHz ±350 mHz; 20 kHz ±350 mHz
・Analog Output Level: +4 dBu, nominal
・Analog Output Distortion (THD+N): <0.003%
・Digital Output Level (Dante transmitter (Output)): -20 dBFS
・Digital Output Distortion (THD+N): <0.0001% |
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| Meters: 4 | ・Function: displays level of line inputs and line outputs in dBFS
・Type: 5-segment LED, modified VU ballistics |
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| GPI: 2 | ・Type: logic input, pulled to +3.3 volts DC through 3.3 k (3300 ohm) resistor, pull down to common to enable
・Signaling Method: tones summed into Dante transmitter audio path, 20 kHz nominal at 48 kHz sampling rate, 18.375 kHz nominal at 44.1 kHz sampling rate |
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| GPO: 2 | ・Output Type: solid-state relay contact
・Contact Type: form A (normally open, not shorted), isolated
・Contact Rating: 400 mA, 60 volts AC/DC, maximum
・Contact Resistance: 2 ohms, maximum
・Detection Method: monitors Dante receiver audio path for presence of 20 kHz (±800 Hz) tone at 48 kHz sampling rate, 18.375 kHz (±800 Hz) tone at 44.1 kHz sampling rate. Tones will pass to line outputs unless low-pass filters enabled.
・GPO Status LEDs: 2 |
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| Auxiliary DC Output | ・Application: for use with GPO outputs
・Type: 12 volts DC, nominal, 10-18 volts DC with external power connected, 25 mA maximum |
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| Connectors | ・Line Inputs: 3-pin female XLR
・Line Outputs: 3-pin male XLR
・Ethernet: Neutrik etherCON RJ45
・External DC: 4-pin male XLR
・GPI/GPO/Aux DC: 9-pin female D-subminiature (DE-9F)
・USB: type A receptacle (located inside Model 44D's enclosure and used only for application firmware updates) |
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| Dimensions -Overall | ・8.7 inches wide (22.1 cm)
・1.72 inches high (4.4 cm)
・8.3 inches deep (21.1 cm) |
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| Mounting Options | ・single-unit rack-mount front panel (M44DRM-1) and two-unit rack-mount front panel (M44DRM-2); uses one space (1U) in a standard 19-inch rack
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| Weight | ・1.8 pounds (0.80 kg), rack-mount front panels add 0.2 pounds (0.09 kg) |
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