DBX DBXDI4

The dbx Di4 is a versatile 4-channel active direct box and stereo line mixer designed to streamline complex stage or studio setups. Built into a compact half-rack unit, the Di4 converts unbalanced signals to balanced XLR outputs, making it ideal for interfacing keyboards, samplers, and other line-level instruments with professional audio systems. It's perfect for musicians and engineers who need a simple, reliable way to manage multiple input sources while maintaining clean, balanced output to front-of-house or recording consoles.

In addition to its DI functionality, the Di4 also acts as a 4-channel stereo line mixer, allowing users to control volume and panning for each input, mix them down to stereo via RCA outputs, and even monitor the mix through the built-in headphone output. Each channel features individual 20dB pad and ground lift switches, offering flexible signal handling and noise control. Whether you're on stage or in the studio, the Di4 offers an efficient and intuitive way to manage multiple audio sources with professional-grade results.

• Four Independent DI Channels: Converts unbalanced signals to balanced XLR outputs for clean integration into pro audio systems.

• Built-In 4-Channel Line Mixer: Mix and pan each input channel to stereo RCA outputs-ideal for keyboard rigs and stage setups.

• Per-Channel Volume & Pan Controls: Customize each input's mix with front-panel level and pan adjustments.

• Independent 20dB Pad & Ground Lift per Channel: Control hot signals and eliminate ground loop noise with dedicated switches.

• Stereo Master Volume & Headphone Output: Monitor the mix directly with onboard headphone jack and control the overall level.

• Rack-Friendly Half-RU Design: Compact and versatile, fits easily into performance and studio rigs.

General Specifications:

• Active 4-channel DI box with built-in line mixer

• 1/2 rack unit (RU) form factor

• Converts unbalanced signals to balanced XLR outputs

• Integrated stereo line mixer functionality

• Designed for keyboards, samplers, modules, and stage integration

Inputs:

• 4x 1/4" TS unbalanced inputs

• Input impedance: 320k Ohms

• Peak input level: +15 dBu

Outputs:

• 4x XLR balanced outputs

• Output impedance: 600 Ohms

• Max output level: +16 dBu

• Stereo line mixer output via RCA connectors

• 1/4" headphone output jack

Mixer Controls:

• Independent volume control per channel

• Independent pan control per channel

• Master volume control for mixer output

Switches:

• Independent 20 dB pad switch per channel

• Independent ground (earth) lift switch per channel

Audio Performance:

• Frequency response: 20 Hz - 20 kHz, 0 dB to -2 dB

• THD+Noise: 0.0008% typical at +4 dBu, 1 kHz

• Interchannel crosstalk: < -90 dB, 20 Hz - 20 kHz

Power:

• Universal power supply: ~100-120 V AC / ~200-240 V AC, 50-60 Hz

• Power consumption: 775 mW

Dimensions & Weight:

• Height: 1.75" (44.5 mm)

• Width: 8" (230.6 mm)

• Depth: 8.5" (217 mm)

• Weight: approx. 3.85 lbs (1.75 kg)