The Active Direct Inject box shall provide a transformer balanced and isolated feed from a source input via a 1/4" TRS jack or 3-pin XLR-type connector. The output of the DI box shall be via an XLR connector. The unit shall also provide a 1/4" TRS jack in parallel with the input to act as a link for line bridging. The link shall be a direct feed from the input, or shall optionally be fed from an actively buffered input signal.
The unit shall be powered either via a phantom power source, or via a standard PP3 type 9 volt battery. An led shall illuminate continuously to show power is provided by a phantom source, or flash approximately every 2 seconds if powered by the battery.
Switches shall be provided for: EARTH LIFT (output pin 1 disconnected from unit ground), INPUT ATTENUATION (of 0, 20 or 40dB), and Power On/Off.
The unit shall be housed in an aluminium extrusion fitted with isolating side-cheeks. The unit shall be sufficiently screened so it is not susceptible to external magnetic fields.
The Active DI box shall be the BSS Audio AR-133.
Input Impedance | 1 mOhm (pad at 0dB), 47 kOhm (pad at -20dB or -40dB) |
Max Input | +9dBu (pad at 0dB), +29dBu (pad at -20dB), +49dBu (pad at -40dB) |
Input Connectors | Two Parallel 1/4" jack connectors (Tip Hot +ve, Sleeve ground), and a parallel XLR connector (unbalanced) (Pin 2 Hot +ve, Pin 1 & 3 ground) |
Output | Transformer Balanced |
Max Output | +8dBu into 600 Ohms or greater |
Output Connectors | XLR3-32 or equivalent |
THD | < 0.005% at 1khz, 0dbu output |
Noise | < -105db unweighted, 22hz-22khz, rms* |
Frequency Response | 30Hz to 20kHz, +0dB/-1dB |
Main/Standby battery | 9 volt PP3 type, preferably alkaline |
Power Consumption | on phantom: less than 7.5mA, on battery: less than 2mA. |
Phantom Power | +20 volts DC to +48 volts DC |
Unit Weight | 650 gms, excluding batteries |
Dimensions | 59 mm x 124 mm x 143 mm (2.3" x 4.9" x 5.6") |
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