Detail 01
+4dB to -10dB conversion
Drops pro line level down to consumer level, so the receiving device stops clipping or distorting.
Product detailSKU #1274228072023
Radial EngineeringPRO ISO Stereo Line Isolator +4dB to -10dB with Radial Transformer
1/5
Independent shopping perspective
The Korena take
Stereo line isolator that converts +4dB balanced gear to -10dB unbalanced and kills ground-loop hum between two devices. For fixing buzz, not shaping tone.
Strong match
Who this is for
- Feeding a -10dB consumer input from +4dB studio gear
- Killing hum between a laptop and a powered speaker
- Two-channel line runs between rooms on separate circuits
Consider the trade-offs
When to look elsewhere
- Plugging in a guitar or bass directly — this is line level
- Anyone needing more than two channels
- Users chasing a tone change rather than a hum fix
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
Transformer isolation
Physically breaks the electrical path between devices, which is what stops ground-loop hum rather than masking it.
Detail 03
Stereo, two channels
Handles a left/right pair in one box. A mono source only uses half of it.
Detail 04
Line isolator, not a DI
Expects line-level signals from mixers, interfaces and players. Instrument pickups are far too weak for it.
Detail 05
Passive, no power
No wall wart or phantom power to find. It works anywhere the signal reaches it.
Final check
Know before you order
- 01No cables included — you supply both the input and output runs
- 02Confirm which end of your chain is +4dB and which is -10dB
- 03Two channels only; a wider stereo rig needs a second unit
Product questions
Before you decide
Straight answers to the questions shoppers most often ask about this product.
01Will this fix my buzzing sound system?
If the buzz is a ground loop between two connected devices, yes. Transformer isolation breaks the shared ground path. Buzz from lighting dimmers or bad cables needs a different fix.
02Can I plug my guitar into it?
No. It works at line level. A guitar needs a DI box to bring instrument level up first.
03Does it need power?
No. It is passive and runs entirely on the signal passing through it.
04How many channels does it handle?
Two, as a stereo pair. For more, you need additional units.
