The AR-133 Active DI Box from BSS Audio 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.

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 BSS AR-133 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. This unit is housed in a rugged aluminum extrusion case with robust polyurethane end-cheeks which give the AR-133 a very distinctive look.

BSS Audio AR-133 Active DI Box Specifications:

• Input Section
  
  Input Impedance
• 1MOhm (pad at 0dB)
• 47kOhm (pad at -20dB)
• 47kOhm (pad at -40dB)
  
  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 to 20kHz +0dB/-1dB
  
  General
• Main/Standby battery: 9 volt PP3 type preferably alkaline.
• Current drain: on phantom - less than 7.5mA on battery - less than 2mA
• Phantom Power: +20 volts DC to +48 volts DC
• Weight: 650 gms excluding batteries.
• Overall Dimensions: 59 mm x 124 mm x 143 mm (2.3" x 4.9" x 5.6")

BSS Audio AR-133 Active DI Box 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 gain without
• loading the source
• Can drive signals up long cable
• lengths
• Powered from console
• phantom power or internal
• battery
• Automatic switchover to battery
• if phantom power fails
• Parallel Link Jack output to feed
• amplifiers directly
• Parallel XLR input for
• converting unbalanced outputs
• to balanced lines

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