Chord DI-A1 Active DI Box

The Chord DI-A1 is a compact and versatile active DI box designed to convert high-impedance signals from instruments or line-level sources into low-impedance balanced outputs for direct connection to mixing consoles or amplifiers. Its built-in buffer amplifier ensures signal integrity over long cable runs, making it ideal for both studio and live sound environments. The DI-A1 features a 3-way pad switch for input level attenuation, a ground lift selector with float and lift options to eliminate hum, and multiple power options including phantom power, 9V battery, or 12V DC adaptor. Housed in a rugged metal enclosure, it delivers reliable performance with minimal noise and maximum flexibility.

Key Features

• Input: 6.3mm jack (unbalanced, Hi-Z)
• Outputs: XLRM (balanced, Low-Z) and 6.3mm jack thru (unbalanced, Hi-Z) for parallel signal routing
• Pad Switch: Selectable attenuation levels at 0dB, -20dB, and -40dB to prevent overloading mixer or amp inputs
• Ground Lift: GND (fully grounded), FLOAT (isolates signal ground from chassis, retains RF/mains filter), and LIFT (fully isolates signal ground without filter)
• Noise Reduction: Integrated RF and mains hum filter
• Power Options: 9V PP3 battery (not included), 12V DC adaptor (200mA min., optional), or 9V to 52V phantom power via XLR input
• Indicators: Low battery LED
• Input Impedance: >100k Ohms
• Output Impedance: 600 Ohms
• Controls: Combined pad and ground lift switch
• Enclosure: Rugged metal housing

Ideal for live sound, studio recording, and installations requiring clean signal conversion from instruments or line-level sources, the DI-A1 delivers professional-grade performance in a compact, durable package.