Behringer Ultra-DI DI100

• Active DI box for stage & studio.
• Features OT-1 transformer, phantom or battery power.
• Handles up to 3,000W speaker output & +50dB input attenuation.
• Converts unbalanced signals to low-noise, balanced format for mixers/PA.

NT$2,500

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Behringer Ultra-DI DI100｜1-Channel Active Instrument/Microphone DI Box

An active DI box that performs well on stage and in the studio

The Behringer Ultra-DI DI100 is Behringer’s active DI box. It uses an OT-1 transformer design, supports phantom power or battery power, and can handle speaker outputs up to 3,000W as well as input attenuation requirements up to +50dB. For guitars, basses, keyboards, and other unbalanced signal sources, the DI100’s core job is to convert the signal into a low-noise, balanced format suitable for sending to a mixer or stage sound system.

Compared with the traditional method of connecting an instrument directly to a mixer via an unbalanced line, the Behringer Ultra-DI DI100 uses impedance matching, balanced signal output, Ground Lift, and switchable Pad / Attenuator design to more effectively reduce noise, hum, and ground-loop issues during long-distance transmission; compared with entry-level passive DIs in the same price range, the DI100 offers more complete power-supply flexibility, input tolerance, and stage adaptability.

Quick Facts Product Overview

Brand：Behringer
Model：Ultra-DI DI100
Form Factor：1-Channel Active DI Box
Power Source：Phantom Power or 9V Battery
Pad / Attenuator：Switchable, supports input levels up to +50dB
Use Cases：Direct instrument connection for live performance, keyboard miking in the studio, bass into PA systems, guitar amp signal splitting, signal balancing in rehearsal rooms

Who should buy the Behringer DI100?

User Recommendation Analysis (Click to expand)

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Who Should Buy

Live performers who need to send guitar, bass, or keyboard signals reliably into a mixer while reducing noise over long cable runs
Small studio users who want to convert unbalanced instrument signals into balanced output to improve recording stability and signal matching efficiency
Sound engineers or band techs who need a rugged, stackable active DI box that can handle stage transport and frequent plugging/unplugging

Who Should NOT Buy

Users who already have multiple high-end multifunction DIs or rackmount signal distribution systems and do not need another mono DI
People who only practice at home over short distances to an amp and do not need to connect to a PA or recording interface may not need this kind of balancing device

Behringer Ultra-DI DI100 core technologies and features

1-channel active DI design: Converts unbalanced, high-impedance signals from guitars, basses, keyboards, and more into balanced, low-impedance signals suitable for mixers, stage snakes, and recording systems.
OT-1 transformer architecture: Features an ultra-flat frequency response that helps preserve the original instrument tone and reduces unnecessary coloration and frequency loss.
Impedance and signal matching: Allows instruments to connect directly to mixers and amplification systems, improving volume stability, tone fullness, and noise performance compared with direct hard-wired connections.
Switchable pad / attenuator: Built-in input attenuation lets the DI100 handle input levels up to +50dB, making it easier to manage high-output sources.
Direct speaker-output connection: Supports direct connection to speaker outputs up to 3,000W, ideal for stage workflows that need to take a signal from a guitar amp or power amp.
Ground Lift switch: Effectively eliminates hum and noise caused by common ground loops, especially useful for live performance and complex power environments.
Dual power system: Supports phantom power and 9V battery operation; when phantom power is enabled, the internal battery is automatically disabled for added convenience.
TRS and gold-plated XLR connectors: Ensures stable connections on both the instrument side and balanced output side, suitable for standard stage and studio cabling setups.
Durable aluminum chassis: Uses a touring-friendly aluminum enclosure that balances weight and structural strength for daily transport and stage use.
Stackable large rubber corners: Improves placement stability and impact protection, making it more convenient for side-by-side DI setups, storage, and transport.

Active DI signal conversion architecture

The active design handles impedance matching between instruments and lines more effectively, resulting in more stable signal transmission.
Especially suitable for keyboards, active basses, post-effects outputs, and applications that require long-distance signal delivery to a PA.

High input tolerance and pad design

The switchable pad allows the DI100 to handle higher-level sources, not only standard instruments but also some amplifier output signals.
With support up to +50dB input level, it is very practical for live engineers and multi-source signal integration.

Ground Lift and low-noise balanced output

The Ground Lift switch quickly addresses ground-loop noise, making it a valuable practical feature for stage systems, rehearsal spaces, and multi-device setups.
The balanced output reduces electromagnetic interference during long cable runs, keeping the signal sent to the mixer cleaner and more stable.

Dual power system and stage practicality

Can be powered by phantom power or a 9V battery, offering flexibility across different mixers and venue conditions.
When phantom power is connected, the internal battery is automatically turned off, avoiding unnecessary power drain and simplifying live operation.

Technical Specs

Brand	Behringer
Model	Ultra-DI DI100
Form Factor	1-Channel Active DI Box
Circuit Type	Active
Frequency Response	Ultra-flat frequency response
Pad / Attenuator	Switchable, supports input levels up to +50dB
Maximum SPL	Can be connected directly to speaker outputs up to 3,000W
Connector	TRS, XLR
Power Source	Phantom Power or 9V Battery
Phantom Power	Supported
Other Features	Ground Lift switch, automatic battery shutoff, stackable rubber corners
Chassis Material	Aluminum body

Behringer Ultra-DI DI100 Pros and Cons

Pros & Notes (Click to expand)

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Pros

Active DI architecture, suitable for balancing most instrument and keyboard signals
Supports phantom power and battery power, offering high flexibility for stage and studio use
Includes Ground Lift to effectively handle common ground-loop noise
Switchable pad / attenuator can handle high-output signals and a wide range of source devices
Aluminum body with large rubber corners for good durability and touring practicality

Notes to Know

If phantom power is not used, a separate 9V battery is required to power the active circuit
This product is a mono DI box; multiple instruments require multiple units or a multichannel solution
When connecting to speaker outputs, it must still be used correctly to avoid exceeding system configuration limits

Behringer Ultra-DI DI100 FAQ

Q：What is the Behringer Ultra-DI DI100 used for?

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A：Yes. It converts an instrument’s unbalanced signal into a balanced signal, making it easy to connect to a mixer and PA system.

Q：Can the DI100 be connected to a guitar amp’s speaker output?

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A：Yes. The DI100 supports speaker outputs up to 3,000W, but it must be used with the correct wiring method.

Q：What is the difference between the DI100 and a typical passive DI?

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A：There is a difference. The DI100 uses an active design, and its impedance matching and high-input handling flexibility are generally more complete.

Q：Is the DI100 suitable for beginners or small bands?

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A：Yes. It is intuitive to use and has a clear purpose, especially for musicians and rehearsal bands that need to connect to PA systems.

Q：Does the DI100 require batteries to operate?

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A：Not necessarily. It can be used with phantom power; a 9V battery is only needed when phantom power is not available.

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