dbx Di4 4-Channel Direct Box

Drowning in DI boxes? With the dbx Di4 you can put 4 DI points in one box to de-clutter your stage or studio, plus it doubles as a 4-channel line mixer.

The 4-channel Di4 is designed to be used as a standard tool for many audio applications. Offering four channels, the Di4 easily solves the problem of converting unbalanced signals into balanced output suitable for use with mixers, PAs, recording consoles and more. The Di4 also functions as multi-channel stereo line mixer. This feature allows you to connect all your keyboards, samplers and modules into just one rack unit on stage and supply independent XLR balanced outputs to the stage box for a front of house engineer and set your own independent mix for stage monitoring. The Di4 also offers a headphone output.

Using the dbx Di4 as a DI Box

Connect the signal you would like to convert from unbalanced to balanced to the Di4 via a 1/4-inch unbalanced jack to one of the channel inputs on the front panel of the unit. Connect an XLR balanced cable to the corresponding channel output on the rear of the Di4 and connect to your chosen destination. If the input signal strength is too high you can depress the 20dB pad. If there is an ground (earth) loop hum you can remove by depressing the earth lift switch.

Using the dbx Di4 as a Line Mixer

You can mix volume and pan of all input signals to a single stereo pair of RCA connections on the rear of the Di4. This enables use of the unit as a fully functional line mixer. Just connect the RCA stereo master outputs on the rear to your chosen destination and adjust the individual volume and pan controls for each individual channel on read more the front of the Di4 to suit your needs.


- Four totally independent DI box units in 1/2 RU package
- Independent 20dB pad switch per channel
- Independent ground (earth) lift switch per channel
- Independent volume control per channel for line mixer output
- Independent pan control per channel for line mixer output
- Master volume
- Headphone output
WARNING: Cancer and Reproductive Harm - www.p65Warnings.ca.gov.
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- Audio Input Connectors: 1/4" jack Type TRS balanced
- Input Impedance: 47k Ohms
- Min. Sensitivity: -20dB
- Peak Input Level: +16dB
- Headphone Connector: 1/4" jack
- Stereo Line Mixer Outputs: RCA Connectors
- Impedance: 600 Ohms
- Max Output Level: +2dB (peak level +18.5 dB)
- XLR Balanced Outputs: XLR Connectors
- Minimum Output Impedance: 600 Ohms
- Maximum Output Level: 0dB (peak level +18.5dB)
- Frequency Response: 20Hz~20kHz, 0dB~-2B
- Distortion: 0.02%
- Signal to Noise Ratio: better than 74dB
- Crosstalk: >80dB@1kHz;-20dB input
- Power Supply: ~ 100-120 V AC, ~ 200-240 V AC, 50-60 Hz
- Power Consumption: 11.5VA
- Fuse: 100-120 V AC: 630 mA (slow-blow) 200-220 V AC: 315 mA (slow-blow)
- Dimensions: 1 3/4" (44.5 mm) x 8" (230.6 mm) x 8 1/2" (217 mm)
- Weight: Net weight approx. 3.85 lbs. (1.75 kg)
Dimensions and Weight in Packaging
Base Item
Shipping Weight: 2.25 lbs
Shipping Dimensions: 9 x 9 x 3 in
Manufacturer Part Number (MPN): DI4
Warehouse Resealed, USED
Shipping Weight: 2.1 lbs
Shipping Dimensions: 9 x 9 x 3 in
Manufacturer Part Number (MPN): DI4

For support or warranty questions, please contact the manufacturer:
Phone: 844-776-4899

Reviewers gave this product an overall rating of 4.5 out of 5 stars. (1 ratings)
Submitted June 11, 2018 by Jason Maxfield in Yucca Valley, CA
"Great DI Box"
Overall: 4.5 out of 5 stars
(see rating details)
Verified Customer zZounds has verified that this reviewer made a purchase from us.
I got this because of a band that I know is coming in a couple months and they'll need 4 DI channels. Instead of messing around with a bunch of single channel units, I bought this instead.The picture shown isn't the same. It has black level knobs, but still has the same functions as the one pictured.One thing I noticed, and it's a minor gripe, is that the box has no on/off switch. So, at the end of the night I have to unplug the unit. Not a huge deal, just would of been nice to leave it plugged in and turn it on or off.Sound quality is great. I have plugged into aux inputs straight from the guitar to our Behringer X32 board and I think it sounds better through the DI box. I also have attenuation switches for hot sources, so it's easier to handle than straight to aux inputs. Also, I do not have any grounding hum going through the DI box since the single is taken from the box to the board via XLR.
Musical Background:
I'm a sound engineer and also played trumpet once upon a time.
Musical Style:
rock, metal, blues, classical.
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