
- It supports higher sample frequency rates up to and including 176.4kHz and 192kHz.
- It has additional independent AES/EBU and Word Clock synchronising inputs so that the A/D and D/A sections can operate independently, with the digital outputs synchronised to an external master reference clock.
- It has TOSlink optical digital audio input and output.
- It has front panel push-button switches for all the main settings. The buttons are arranged in sets, where pressing the button advances the current selection and LED indicator.
- A serial RS232 port is included so that the RB-ADDA2 settings can be controlled remotely. The front panel LED indicators to alter automatically when using RS232 commands.
A/D Audio Specification | |
Maximum Input Level: | +27dBu balanced inputs, +17dBu unbalanced inputs |
Input Impedance: | >10kΩ unbalanced, >20kΩ bridging balanced |
Dynamic Range: | >110dB |
Gain Range: | Adjustable input gain of ±3dB on selected +12dBu, +18dBu or +24dBu, ref FSD |
Distortion & Noise: | >96dB THD + N at 1kHz |
A/D Connections | |
Analogue Inputs: | 2 x XLR 3 pin (balanced) 2 x RCA phono (unbalanced) |
Sync Inputs: | 1 x AES/EBU XLR 3 pin female 1 x TTL Word clock BNC |
Digital Outputs: | 1 x AES/EBU XLR 3 pin male 1 x S/PDIF RCA phono 1 x TOSlink optical |
Serial RS232: | x 9 pin D-type plug |
Mains Input: | Filtered IEC, continuously rated 85-264VAC @ 47-63Hz, 10W max |
Fuse Rating: | Anti-surge fuse 1A 20 x 5mm |
A/D Operational Controls | |
Analogue Input Source: | Balanced XLR or unbalanced phono, via A/D SOURCE push-button |
Analogue Input Level for FSD: | +12dBFS, +18dBFS or +24dBFS, via A/D SOURCE push-button |
Analogue Input Level Adjust: | +9dBu to +27dBu via rear-panel pre-set pots |
Sample Frequency Rates: | 32kHz, 44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz or 192kHz, via FREQUENCY push-button |
Bit Depth: | 16, 20 or 24 bits, via BITS push-button |
Channel Status Bits: | Consumer mode, professional mode or follow input, via CS DATA push-button |
Sync Input Select: | AES/EBU, Word Clock or D/A input, via SYNC push-button |
Sync Mode Select: | Master, slave, auto, auto-lock, via SYNC push-button |
Digital to Analogue Conversion | |
D/A Audio Specification | |
Maximum Output Level: | +24dBu balanced output, +14dBu unbalanced output |
Output Impedance: | <50Ω balanced, <75Ω unbalanced |
Dynamic Range: | >110dB |
D/A Connections | |
Digital Inputs: | 1 x AES/EBU XLR 3 pin female 1 x S/PDIF RCA phono 1 x TOSlink optical |
Analogue Outputs: | 2 x XLR 3 pin male (balanced) 2 x RCA phono (unbalanced) |
D/A Operational Controls | |
Digital Input Select: | AES/EBU, S/PDIF or TOSlink optical, via push-button |
Analogue Output Level for FSD: | Selectable +12dBu, +18dBu or +24dBu output level, ref FSD, via D/A SOURCE push-button |
Equipment Type | |
RB-ADDA2: | Combined A/D and D/A converter, 24 bit 192kHz |
Physical Specification | |
Dimensions (Raw): | 48cm (W) x 15.8cm (D*) x 4.2cm (H) (1U) 19” (W) x 6.2” (D*) x 1.7” (H) (1U) |
(Boxed): | 59cm (W) x 27.5cm (D*) x 11cm (H) 23.2” (W) x 10.8” (D*) x 4.3” (H) |
Weight: | Nett: 1.6kg Gross: 2.3kg Nett: 3.5lbs Gross: 5lbs |
* Note that this product is deeper than standard Red boxes. |
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2-Year Warranty

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