The RB-DMA2 consists of two independent low-noise microphone pre-amplifiers for converting microphone level signals to a digital AES/EBU or S/PDIF output. Individual analogue balanced line level outputs are also produced for use, for example, to feed talkback systems. The unit can either be used as two independent microphone amplifiers, or one mic input can be copied to both channels of the digital output.
The microphone inputs are XLR-3 type and are electronically balanced. The input gain for each input can be adjusted individually by a volume control on the front panel enabling the use of dynamic and powered microphones and each has a LED level indicator. For each channel there are independent switches to control a high pass filter (low frequency roll-off at 125Hz) and to provide phantom power at +48V to the connected microphones.
The RB-DMA2 has AES/EBU, S/PDIF and TTL Word Clock sync inputs and has the same sync modes, bit depth selection, channel status bit adjustment, front panel LED synchronisation and calibration routine as the RB-ADDA. Please refer to that product for further information.
Please select the variant from the product options.
Audio Specification Maximum Input Level -25dBu Minimum Input Level -62dBu to give FSD Input Impedance 2kohm nominal Gain Range 37dB Signal to Noise 130dB EIN Dynamic Range >110dB Distortion and Noise <0.01% THD + N absolute @ 1kHz Low Frequency Roll-off 125Hz @ 6dB/octave Phantom Power 48V Connections Microphone Inputs 2 x XLR 3 pin female (balanced) Sync Inputs 1 x AES/EBU XLR 3 pin female (balanced) 1 x S/PDIF RCA phono 1 x TTL BNC female Digital Outputs 1 x AES/EBU XLR 3 pin male (balanced) 1 x S/PDIF RCA phono Analogue Outputs 2 x XLR 3 pin male (balanced) Mains Input Filtered IEC, switchable 110-120V, or 220-240V, fused, 10W max Indicators LED Level Green indicates FSD -18dB Orange indicates FSD -12dB Red indicates FSD -6dB Physical Specification Weight Nett: 1.6kg Gross: 2.2kg Dimensions Raw: 48cm (W) x 10.8cm (D) x 4.2cm (H) (1U) Boxed: 53cm (W) x 20.5cm (D) x 6cm (H)
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