What is the dbx Di4 and who is it for?

The dbx Di4 is a 4-channel active direct box and line mixer designed to convert unbalanced instrument or line-level signals into balanced XLR outputs. It's ideal for musicians, studios, and live sound engineers needing to connect multiple instruments (like keyboards, guitars, or bass) directly to a PA system or recording interface, ensuring a clean, hum-free signal over long cable runs.

How do I connect different signal levels to the Di4?

Each channel on the Di4 features a 20dB pad switch to accommodate various input levels. For low-level signals like passive guitar pickups, you typically won't engage the pad. For hotter signals from active instruments, keyboards, or line-level devices, engage the 20dB pad to prevent clipping and ensure optimal signal integrity.

What are the output options on the Di4?

The Di4 offers four individual XLR outputs for sending balanced signals to a mixer or audio interface. Additionally, it includes a dual stereo RCA auxiliary output for connecting to other devices, and a 1/4" headphone output for direct monitoring. This allows for flexible routing and convenient personal monitoring during performances or recording sessions.

Why does the Di4 need a power supply?

The dbx Di4 is an active direct box, meaning it uses internal electronics to buffer and convert your signal. This requires power, which is supplied by the included 9V DC power supply. Active DIs generally provide a stronger, more consistent output signal and better frequency response compared to passive DIs, especially with passive instruments.

What is the purpose of the ground lift switch?

The ground lift switch on the Di4 helps eliminate unwanted hum and buzz caused by ground loops. When you connect multiple pieces of audio equipment, differences in ground potential can create noise. Engaging the ground lift disconnects the ground path between the input and output, often resolving these annoying electrical interference issues for a cleaner sound.

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dbx Di4 4-channel Active Direct Box with Line Mixer

Name: Di4 4-channel Active Direct Box with Line Mixer
Brand: dbx

4-channel Active Direct Box with Line Mixer, 20dB Pads, Ground Lift, Per-channel Volume/Pan, Master Volume, and Headphone Out

Write your review Item ID: DBXDI4

dbx Di4 4-channel Active Direct Box with Line Mixer

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