Gearsupply × L-Acoustics CPO K1 Systems
Gearsupply and L-Acoustics have partnered to offer Certified Pre-Owned K1 & K1-SB Systems
Gearsupply × L-Acoustics CPO K1 Systems
Gearsupply and L-Acoustics have partnered to offer Certified Pre-Owned K1 & K1-SB Systems
Speak with our GearGuru specialists to find the perfect gear for your next show.
Direct Boxes, colloquially known as DI boxes or DIs, are indispensable tools in the world of professional audio, particularly in live sound and AV installations. These devices serve a vital purpose: to convert unbalanced, high-impedance signals from instruments like electric guitars, keyboards, or bass guitars into balanced, low-impedance signals suitable for PA systems or recording interfaces. A DI box ensures cleaner, noise-free signal transmission over longer cable runs, which is essential in large venues or complex event setups. Active and passive DIs, the two main types, cater to different needs. Active DIs require external power and are typically used with passive instruments, while passive DIs, containing no amplifying circuit, work well with active instruments. Top brands in this category include Radial Engineering, BSS, Countryman, and Whirlwind, each offering models like the Radial JDI, BSS AR-133, and Countryman Type 85 known for their reliability and audio fidelity. Event professionals often use DIs in concerts, corporate events, and touring shows to manage multiple input sources, and AV installation integrators employ them in permanent fixtures at theaters, conference centers, or arenas to ensure consistent sound quality and signal strength. As a cornerstone of audio signal management, DI boxes are a crucial addition to any professional AV equipment inventory.