Detail 01
Passive design
No power is required; connect it and use it.
Product detailSKU #1427899477296
Radial EngineeringJDI Stereo Passive Direct Box
Independent shopping perspective
The Korena take
JDI Stereo is a passive two-channel direct box that uses a pair of Jensen audio transformers, so it needs no power to operate. It balances an unbalanced Hi-Z signal and lowers its impedance for long cable runs, while transformer isolation addresses stray DC voltage associated with noise and ground loops. Each channel has a -15 dB pad, with 1/4-inch input and thru-put connections. A ground-lift switch serves the two XLR outputs, and its steel enclosure is built around a 14-gauge I-beam inner frame.
Strong match
Who this is for
- Sending two unbalanced Hi-Z sources through long cables without requiring external power.
- Stage or studio signal routing where ground-loop hum and buzz need to be addressed.
- Handling high-level signals using the independent -15 dB input pad on each channel.
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
Dual Jensen transformers
They balance the signal, lower impedance, and isolate input from output.
Detail 03
Two -15 dB input pads
Each channel has its own pad for reducing input level.
Detail 04
Ground lift on two XLR outputs
It lifts pin 1 on both XLR outputs to reduce ground-loop hum and buzz.
Detail 05
1/4-inch input and thru-put connectors
Each channel provides input and thru-put connections.
Product questions
Before you decide
Straight answers to the questions shoppers most often ask about this product.
01Does the JDI Stereo need power?
No. It is a passive direct box and requires no power.
02How many channels does it provide?
It is a stereo direct box with two channels.
03Can it help with ground-loop noise?
Yes. Transformer isolation and the ground-lift switch are provided to address noise, hum, and buzz associated with ground loops.
04Are level pads included?
Yes. Each channel has a -15 dB input pad.
