ACTIVE KEY Active DI-box BSS AR-133

The ACTIVE KEY Active Di-Box BSS AR-133 is a professional active direct injection box designed for high-quality audio signal conversion. It features a balanced XLR output and a 1/4" TS jack input, with a parallel XLR link for versatile connectivity. Ideal for stage, studio, and broadcast applications, this DI box ensures clean, noise-free signal transmission with switchable input pads and ground lift.

Advantages

High-quality audio transformer isolation eliminates ground loops and hum. Active circuitry with +48V phantom power or 9V battery operation provides reliable performance. Switchable input pads (0dB, -20dB, -40dB) accommodate a wide range of input levels. Robust aluminum and steel chassis ensures durability in demanding environments.

Suitable for

• Connecting electric guitars, basses, and keyboards to mixing consoles
• Balanced signal transmission over long cable runs
• Stage and studio recording setups
• Broadcast and live sound reinforcement

Key specifications

• Input: 1/4" TS Jack, XLR (parallel link)
• Output: Balanced XLR Male
• Input Impedance: >1M Ohm (0dB pad), >47k Ohm (-20dB/-40dB pad)
• Output Impedance: <600 Ohm
• Maximum Input Level: +9dBu (0dB pad), +29dBu (-20dB pad), +49dBu (-40dB pad)
• Frequency Response: 30Hz - 20kHz (+0dB/-1dB)
• THD+N: <0.005% (1kHz, +10dBu output)
• Noise Level: -100dBu (20Hz-20kHz, input shorted)
• Power Source: +48V Phantom Power (IEC 61938 P48), 9V PP3 Battery
• Battery Life: >80 hours (typical alkaline)
• Input Pad: 0dB, -20dB, -40dB (switchable)
• Ground Lift: Yes (switchable)
• Gain: -10dB (input to output, 0dB pad)
• Chassis Material: Robust aluminum extrusion and steel
• Phantom Power Consumption: <8mA
• Indicators: Battery Status LED
• Transformer Isolation: Yes (high-quality audio transformer)
• Circuitry Type: Active

Recommendations

For optimal performance, use a balanced XLR cable to connect the output to a mixer or audio interface. Ensure phantom power is enabled when using the DI box without a battery. The ground lift switch can help eliminate hum in problematic setups.