Detail 01
Passive (transformer) design
No battery and no phantom power required. Nothing to fail mid-set, and it works on any mixer input.
Product detailSKU #1274115049919
BehringerULTRA-DI DI400P Passive Direct Box
1/4
Independent shopping perspective
The Korena take
A passive direct box that converts an unbalanced 1/4" instrument signal to balanced XLR. For running bass, keys or acoustic pickups into a mixer.
Strong match
Who this is for
- Bass or keys going straight to a house mixer or snake
- Long cable runs where an unbalanced line would pick up hum
- Backup DI to keep in a gig bag or backline case
Consider the trade-offs
When to look elsewhere
- Passive instrument pickups needing a high-impedance active front end
- Anyone needing an amp-out or thru jack for onstage monitoring
- Line-level sources that will be over-padded by the 20dB drop
What matters in use
The specifications, translated
Catalog numbers tell only part of the story. These are the details most likely to change how this product feels, sounds, or fits into a setup.
Detail 02
110:1 impedance ratio
Drops a high-impedance instrument output to mic-level impedance, which is what a mixer's XLR preamp expects to see.
Detail 03
-20dB level change
Signal arrives 20dB quieter, so the engineer adds gain at the desk. Hot line sources stay in range instead of clipping.
Detail 04
40Hz to 20kHz frequency response
Full range for most sources, but the bottom octave of a 5-string bass sits at the edge of that window.
Detail 05
0.0007% THD at 1kHz
Distortion low enough to be inaudible. The box is not adding character, it's just changing the connection.
Detail 06
0.44 lb, 1.4" x 4.7" x 2.6"
Fits a gig-bag pocket. Light enough that a stiff XLR cable can drag it across the floor.
Final check
Know before you order
- 01No cables included. You need a 1/4" TS cable in and an XLR out.
- 02Passive, so leave phantom power off unless your desk needs it elsewhere.
- 03No parallel thru jack, so plan how you're feeding your stage amp.
Product questions
Before you decide
Straight answers to the questions shoppers most often ask about this product.
01Does it need phantom power or a battery?
Neither. It's a passive transformer DI, so it works with nothing plugged in but your two cables. Phantom power isn't required.
02Can I use this with an active bass or keyboard?
Yes. The -20dB level drop is there specifically to keep hot active outputs from overloading the mixer preamp.
03Why is the signal so much quieter at the board?
That's the 20dB pad doing its job. The engineer makes it up with preamp gain, which is normal for any DI.
04Can I run it backwards to feed an amp from a mixer?
A passive transformer will pass signal either direction, but the impedance ratio and 20dB drop are set up for instrument-to-mixer use.
Reference
Full specifications
The complete catalog record, organized around the decisions musicians make when comparing gear.
1 detailsSound
- Frequency Response
- 40Hz (-3) to 20Khz
4 detailsConnections & power
- Output
- Balanced XLR
- Input
- 1/4 inch TS (unbalanced)
- Impedance Ratio Input to Output
- 110:1
- Level Change Input to Output
- -20dB
2 detailsSize & weight
- Weight Approx
- .44 lb. (.02 kg)
- Dimensions Hxwxd
- 1.4 inch x 4.7 inch x 2.6 inch, (35 mm x 120 mm x 66 mm)
1 detailsOther
- Thd N Distortion
- 0.0007% @ 1kHz input level +dBu
