Direct Injection (DI) Box Klark Teknik DI 10P 1-channel passive

Passive DI Box Klark Teknik DI 10P 1-channel passive is a single-channel direct injection unit designed to connect instruments and line-level sources to mixing consoles, audio interfaces, or PA systems. The DI 10P provides impedance matching and an isolated balanced output without active electronics, allowing a simple, rugged solution for converting unbalanced high-impedance signals to balanced low-impedance outputs. It includes a ground lift function to help eliminate hum and ground-loop issues in live and studio environments.

Advantages

The DI 10P's passive design requires no power source, making it reliable in a range of setups and minimizing failure modes associated with active circuitry. Its single-channel form factor is compact and sturdy for stage and rack use, while the ground lift switch and balanced output improve signal integrity over long cable runs. The unit preserves the character of the connected instrument thanks to its simple, transparent passive circuitry and reduces interference when connecting to professional mixing equipment.

Suitable for

• Electric guitar and bass direct connection to mixer or PA
• Keyboards, drum machines and electronic instruments with unbalanced outputs
• Line-level sources requiring balanced connection for long cable runs
• Live stage and rehearsal setups where power is limited or unavailable

Key specifications

• Single-channel passive direct injection (DI) design
• Unbalanced instrument/line input and balanced output
• Ground lift switch to eliminate hum and ground loops
• Passive transformer isolation for noise rejection and impedance matching
• Compact, rugged metal chassis suitable for stage use

How to use

Connect the instrument or unbalanced line output to the DI 10P input using a standard 1/4" cable. Send the balanced output (XLR) to the mixer or PA input. If hum or buzz is present, engage the ground lift switch to interrupt the chassis ground connection between the DI and the mixing console. Because the unit is passive, no power connection is required; simply install it in-line where impedance matching and balanced conversion are needed.

Usage recommendations

For best results, use high-quality instrument cables and keep cable runs as tidy as possible. When connecting active pickups or low-output sources, check the resulting level at the console and adjust input gain accordingly. Avoid using the ground lift unless necessary; test with and without it to determine the quietest configuration. Store the unit in a dry, ventilated area when not in use and inspect connectors periodically for secure contact.