BSS Audio AR-133
Active DI box, AR133

AR-133

With added functionality and enhanced audio performance, the AR-133 has been designed to be more affordable for musicians, studios and PA companies.  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.

Features

• Switchable input attenuation
  • 0dB for guitar-type pickups
  • -20dB for line level signals
  • -40dB for speaker feeds
• Matches the level and impedance with unity gainwithout loading the source
• Can drive signals up long cable lengths
• Powered from console phantom power or internalbattery
• Automatic switchover to battery if phantom powerfails
• Parallel Link Jack output to feed amplifiers directly
• Parallel XLR input for converting unbalanced outputs to balanced lines

Specifications

• Input Section
  • Input Impedance
    • 1 Mohm (pad at 0dB)
    • 47 kohm (pad at -20dB)
    • 47 kohm (pad at -20dB)
  • Max Input Level
    • +9dBu (pad at 0dB)
    • +29dBu (pad at -20dB)
    • +49dBu (pad at -40dB)
  • Connectors: Two parallel 1/4" jack connectors and a parallel XLR connector (unbalanced)
    • Jack: Tip Hot (+ve), Sleeve Ground
    • XLR: Pin 2 Hot (+ve), Pin 1 & 3 Ground
• Output Section
  • Output: Transformer Balanced
  • Max. Output Level: +8dBu into 600 ohms or greater
  • Connector: XLR3-32 or equivalent
• System Performance
  • Distortion (THD): <0.005% at 1kHz, 0dBu output
  • Noise: <-105dB unweighted, 22Hz-22kHz, rms
  • Frequency Response: 30Hz-20kHz, +0dB/-1dB
• General
  • Main/Standby: 9 volt PP3 type, battery preferably alkaline
  • Current drain
    • Phantom: less than 7.5mA
    • Battery: less than 2mA
  • Phantom Power: +20 to +48 V DC
  • Weight: 650 grams, excluding batteries
  • Overall Dimensions: 59mm (2.3") x 124mm (4.9") x 143mm (5.6")

Our Part #  AR133