BSS AR-133 Active DI Box
BSS AR133 Active DI Box
The unit includes phantom power and battery supplies as standard. Should the phantom power from the console fail or be accidentally switched off, the AR-133 automatically switches over to the internal 9V battery providing uninterrupted use.
The unit is housed in a rugged aluminium extrusion case, with robust polyurethane end-cheeks which give the AR-133 a very distinctive look.
Input connectors are both 1/4″ jack sockets and an XLR socket, the latter meaning that the AR-133 can be used to convert unbalanced signals to a balanced output on XLRs throughout.
The arched case allows cables to run back underneath the unit from the end for neat cable management.
Input attenuation is 0, -20 or -40dB, making the box suitable for instrument, line or amplifier levels on inputs. On the output side, a ground-lift switch is provided for quick solutions to ground-loop problems.
The AR-133 uses an enhanced version of the same audio path as the AR-116, now regarded by many people as a reference standard. The sound quality is legendary, particularly on acoustic and bass guitars.
Numerous applications can be satisfied by the AR-133. For example, as well as the traditional guitar use, the AR-133 can be used with keyboards, DJ consoles, amplifier outputs, and other electronic sources.
An additional bonus is the ability to use the AR-133 as an active balancing device.
ARCHITECT’S AND ENGINEER’S SPECIFICATION
AR-133 ACTIVE DI BOX/LINE BALANCER
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 AR-133.
OTHER SPECIFICATIONS:
- 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″)
