Detail 01
Passive design
No phantom, no battery, no adapter. Plug it in and it works on any console, powered or not.
Product detailSKU #1274228072074
Radial EngineeringProDI Passive Direct Box
1/5
Independent shopping perspective
The Korena take
A passive direct box that needs no power at all. For keyboards, active basses and amp DI outs going into a mixer over long cable.
Strong match
Who this is for
- Keyboards and active basses feeding a live console
- Backline gigs where phantom power isn't guaranteed
- Splitting an amp's line out to front of house
Consider the trade-offs
When to look elsewhere
- Weak piezo acoustic pickups that need an active buffer
- Anyone wanting the widest low-end extension from a DI
- Passive guitars run straight in without a pedal or preamp
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
What a passive DI likes
Sources with their own output stage — keyboards, active basses, amp line outs — drive it properly and sound full.
Detail 03
Direct box function
Turns an unbalanced 1/4" output into a balanced XLR, so long runs to the board don't pick up hum or hiss.
Detail 04
$134.99
Costs less than the active boxes in the line because there's no powered circuit to build or supply.
Final check
Know before you order
- 01Cables not included — bring your own instrument cable and XLR
- 02Passive boxes prefer stronger sources; weak piezo pickups may sound thin
- 03Nothing to power, but also nothing to switch on if signal disappears
Product questions
Before you decide
Straight answers to the questions shoppers most often ask about this product.
01Does it need phantom power?
No. It's passive, so it needs no phantom power, no battery and no adapter. It works on any mixer input, including ones with no phantom at all.
02Passive or active — which should I get?
Passive works well with keyboards, active basses and amp line outs. Choose an active box if you're running a weak, high-impedance source like a piezo acoustic pickup.
03Can I use it with a keyboard?
Yes. Keyboards have their own output stage, which is exactly the kind of source a passive direct box handles well.
04Will it work with long cable runs?
Yes. Converting to a balanced XLR output is the whole point — that's what lets the signal travel across a stage without picking up noise.
