BSS AR-133 Active DI Box



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

BSS AR-133 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.

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UPC (Universal Product Code) 00691991600005
MPN (manufacturer part number) AR-133
Condition New
Features Input Connectors and switches Input 1/4" Jack: Unbalanced, Tip hot (+ve), sleeve ground; Main input for instruments Impedance (Pad setting) 1MOhm (0dB) 47kOhm (20dB) 47kOhm (40dB) 3 - pin XLR Socket: Unbalanced, parallel link with main 1/4" jack socket. Pin 2 hot, Pins 1 and 3 ground. Link 1/4" Jack: Output, parallel wired with main 1/4" input, or fed via a buffer amplifier from main input. Tip hot, Sleeve ground. Output Connector and switches 3-pin XLR Output: Balanced (via transformer) Pin 2 Hot (+ve) Pin 3 Cold (-ve) Pin 1 Ground Ground Lift Switch: By switching to the LIFT position, the internal connection to the output pin 1 is removed, isolating the AR-133’s grounding system from that of the rest of the system
Specs Input Section Input Impedance 1M Ohm (pad at 0dB) 47k Ohm (pad at -20dB) 47k Ohm (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")
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