BB2 Technical Specifications
| DIGITAL I/O | |
| The digital input and output connectors are shared with the analogue RCA line outputs. | |
| DIGITAL INPUT | |
| Protocols | S/PDIF (consumer, IEC958) or AES3 (professional AES3-1992, AES/EBU) |
| Connector | RCA Phono socket, AC coupled |
| Input levels | 500mV nominal, 200mV to 2.5Vp-p at all sample rates |
| Input impedance | 75Ω ±5% |
| Sample Rates | 32kHz to 96kHz |
| DIGITAL OUTPUT | |
| Protocols | S/PDIF (consumer, IEC958) or AES3 (professional AES3-1992, AES/EBU) (software selectable) |
| Connector | RCA Phono socket, AC coupled |
| Output levels | 500mV p-p ± 10% |
| Input impedance | 75Ω ±5% |
| Sample Rates | 32kHz to 96kHz |
| Data Jitter | <12ns p-p |
| ANALOGUE INPUTS | |
| The hardware supports 2 channels of analogue input from either RCA Phono sockets at audio line-level, or from the 3.5mm stereo socket (microphones). Note that only one pair of inputs may be used at a time. | |
| Sample Rates | 32kHz to 96kHz |
| Conversion | 24-bit 128x over-sampling ΔΣ |
| ANALOGUE LINE INPUTS | |
| Connector | RCA Phono socket |
| Nominal level for peak digital audio (sine) | 500mV nominal, 2V RMS (8.24dBu) |
| Input impedance | 47kΩ ±5% |
| Frequency Response | 20Hz - 20kHz, +0/-0.1dB, AC coupled |
| Total Distortion + Noise (THD+N) | < -93dB (0.0022%) at 1kHz, peak level |
| L/R channel matching | better than 0.2dB |
| MICROPHONE INPUTS | |
| Microphones may be either dynamic or electret-condenser types. Phantom power is not provided. | |
| Connector | 3.5mm stereo jack socket |
| Nominal level for peak digital audio (sine) | 500mV nominal, -45dBu, 4.3mV RMS |
| Nominal Input impedance | 620Ω |
| Frequency Response | 20Hz - 20kHz, +0/-1dB, AC coupled |
| Total Distortion + Noise (THD+N) | < -69dB (0.035%) at 1kHz, peak level |
| ANALOGUE OUTPUTS | |
| The hardware has two sets of outputs, a pair of RCA Phono sockets which can be either analogue outputs or digital I/O, and a 3.5mm stereo headphone output jack | |
| ANALOGUE LINE OUTPUTS | |
| Connector | RCA Phono socket |
| Nominal level from peak digital audio (sine) | 500mV nominal, 0.8V RMS (0.28dBu) |
| Output impedance | <10Ω |
| HEADPHONE OUTPUTS | |
| Connector | 3.5mm stereo jack socket |
| Nominal level for peak digital audio (sine) | 500mV nominal, -45dBu, 4.3mV RMS |
| Output impedance | <10Ω |
| Max Output power | 30mW into 32Ω 40mW into 16Ω |
| PHYSICAL | |
| Dimensions | |
| Height | 1.7" (43mm) |
| Width | 3.94" (100mm) |
| Depth | 4.85" (123mm) including connectors |
| Weight | 14oz (400g) |
| Power | |
| Voltage | 5V DC - adaptor supplied |
| Consumption | 490mA |
Specifications subject to amendment.
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