AD DB-1 Passive Direct Injection (DI) Box

Pure Signal. Professional Reliability. Built for Every Performance.

The AD DB-1 Passive Direct Injection (DI) Box is an essential audio interface designed to deliver clean, balanced signals from high-impedance audio sources to professional sound systems. Whether you're connecting electric guitars, bass guitars, keyboards, acoustic instruments, or playback devices, the DB-1 ensures reliable signal transmission with minimal noise and maximum audio quality.

Built for live performances, recording studios, churches, rental companies, and permanent AV installations, the AD DB-1 combines exceptional durability with dependable performance, making it an indispensable tool for every professional audio setup.

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Why Choose the AD DB-1?

Professional Passive Signal Conversion

The AD DB-1 converts high-impedance (Hi-Z), unbalanced signals into low-impedance (Lo-Z), balanced microphone-level outputs, allowing instruments and audio sources to connect directly to mixers, audio interfaces, and professional PA systems without signal loss or unwanted interference.

Clean, Noise-Free Audio

Balanced XLR output minimizes hum, electrical interference, and signal degradation over long cable runs, delivering cleaner audio for both live performances and studio recordings.

Parallel Output for Maximum Flexibility

The built-in parallel ¼-inch output allows one audio source to feed two separate destinations simultaneously. Send your instrument signal to your stage amplifier while simultaneously sending a balanced signal to the front-of-house mixer or recording interface.

Flexible Input Attenuation

A convenient 3-position attenuation switch (0 dB / -20 dB / -40 dB) allows precise level matching for a wide range of audio sources, from instruments and keyboards to high-output amplifiers and playback equipment.

Eliminate Ground Loop Noise

The integrated Ground Lift switch helps eliminate unwanted hum caused by ground loops, ensuring quiet and reliable operation even in complex professional sound systems.

Rugged Road-Ready Construction

Built with a heavy-duty all-steel enclosure, the AD DB-1 is designed to withstand the rigors of touring, rental operations, and daily professional use. Its durable construction provides years of dependable performance in demanding environments.

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Ideal Applications

The AD DB-1 is ideal for:

• Electric Guitar
• Bass Guitar
• Acoustic Guitar
• Keyboards
• Digital Pianos
• Synthesizers
• Drum Machines
• Audio Playback Devices
• Laptop Audio
• Live Sound Systems
• Recording Studios
• Churches
• Hotels
• Conference Systems
• Rental Companies
• Permanent AV Installations

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Key Features

• Professional Passive Direct Injection Box
• Converts Hi-Z Unbalanced Signals to Lo-Z Balanced Outputs
• Balanced XLR Microphone-Level Output
• Parallel ¼-inch Output for Simultaneous Connections
• 3-Position Input Attenuation (0 dB / -20 dB / -40 dB)
• Ground Lift Switch for Hum Elimination
• Passive Operation – No Battery or External Power Required
• Compact Professional Design
• Heavy-Duty All-Steel Construction
• Built for Live Sound, Studio Recording, and Permanent Installations

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Technical Specifications

Inputs

• 1 × ¼-inch High-Impedance Input

Outputs

• 1 × Balanced XLR Output
• 1 × Parallel ¼-inch Output

Input Attenuation

• 0 dB
• -20 dB
• -40 dB

Controls

• Ground Lift Switch
• Input Attenuation Switch

Construction

• Heavy-Duty All-Steel Housing
• Compact Roadworthy Design

Power Requirement

• Passive Design
• No External Power Required

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Why Professionals Choose the AD DB-1

The AD DB-1 Passive DI Box is a trusted solution for musicians, sound engineers, churches, rental companies, and production professionals who require dependable signal conversion and noise-free audio performance. Its passive design, rugged construction, and flexible connectivity make it a reliable choice for any professional audio application.

Whether you're performing on stage, recording in the studio, or installing a permanent sound system, the AD DB-1 delivers the clean, balanced signal your equipment deserves.

Tags: AD DB-1, Passive DI Box, Di, Direct Box, Guitar DI, Bass DI, Keyboard DI, Signal Converter, Ground Lift, Audio Interface, Live Sound, Studio Recording, Church Audio, Professional Audio Equipment