The RB-DMA2 consists of two independent low-noise microphone preamplifiers for converting microphone level signals to digital AES/EBU, or S/PDIF, and analogue line level outputs.
The RB-DMA2 can be used as a front end for digital mixing desks or routers, which do not have microphone inputs.
The analogue outputs can be used for routing to talkback systems.
The microphone inputs are XLR-3 type and are electronically balanced.
The input gain for each input can be adjusted individually by coarse and fine gain controls on the front panel and each input has a level indicator.
Additionally the fine gain control knob can be disabled by internal jumpers.
A switch on the rear panel allows input 1 to be routed to both left and right digital outputs, or as input 1 to left output and input 2 to right output respectively.
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.
It also has AES/EBU, S/PDIF and Word Clock sync inputs.
|Analogue Mic Inputs||2 x XLR 3 pin (balanced)|
|Analogue Line Outputs||2 x XLR 3 pin (balanced)|
|Digital Sync Inputs||1 x AES/EBU XLR 3 pin female
1 x S/PDIF RCA phono
1 x TTL BNC female (sync) 50 ohm impedance
|Digital Outputs||1 x AES/EBU XLR 3 pin plug
1 x S/PDIF RCA phono socket
|Mains Input||Filtered IEC, 110-120V, or 220-240V switchable,
fused 10W max
|Fuse Rating||Anti-surge fuse 100mA 20 x 5mm (230VAC)
Anti-surge fuse 250mA 20 x 5mm (115VAC)
|Min/Max Input Level||-63dBu / 5dBu to give FSD|
|Input Impedance||2kΩ nominal balanced|
|Signal to Noise||128dB EIN|
|Distortion and Noise||< 0.01% THD + N absolute @ 1kHz|
|Low Frequency Roll-off||125Hz @ 6dB/octave|
|Analogue Output Level||+18dBu Ref. FSD|
|Operational Controls & Indicators:|
|Bit Depth||16, 20 or 24 bits via DIP switch|
|Digital Output Select||AES/EBU or S/PDIF, via push-switch|
|Sample Frequencies||32kHz – 96kHz, via rotary switch|
|Sync Modes||Master, Slave, Auto, Auto-Lock via rotary switch|
|Digital Input Select||AES/EBU or S/PDIF, via push-switch|
|Channel Status Bits||Set to consumer or professional mode via DIP switch|
|Output Routing||Set dual mono output via DIP switch|
|Led Level||Green ind. -18dBFS, Orange ind. -12dBFS, Red ind. -6dBFS|
|RB-DMA2||Dual digital microphone amplifier|
|Dimensions (Raw)||48cm (W) x 10.8cm (D) x 4.2cm (H) (1U)
19” (W) x 4.3” (D) x 1.7” (H) (1U)
|Dimensions (Boxed)||53cm (W) x 20.5cm (D) x 6cm (H)
21” (W) x 8” (D) x 2.4” (H)
|Weight||Nett: 1.6kg Gross: 2.2kg
Nett: 3.5lbs Gross: 4.8lbs
Autres dénominations : rbdma2, rb dma 2