Detail 01
RF choke
Blocks high-frequency radio energy while passing audio, so broadcast signal stops demodulating in your gear.
Product detailSKU #1274034477446
Rapco HorizonRFBLOX RF Choke Device
Independent shopping perspective
The Korena take
An inline RF choke that suppresses radio interference picked up by audio lines. For players and engineers chasing buzz, hiss, or radio bleed in a rig.
Strong match
Who this is for
- Stages near radio towers where amps pick up broadcast audio
- Studios with recurring RF buzz on a specific input
- Troubleshooting noise after cables and grounding have been ruled out
Consider the trade-offs
When to look elsewhere
- Hum from a ground loop, which needs an isolation transformer
- Noise coming from single-coil pickups near lights or screens
- Anyone without a diagnosed radio frequency problem
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
Inline device
Sits in the signal path between two connections rather than mounting in a rack or on a pedalboard.
Detail 03
Passive
No power supply, no battery, nothing to switch on. It works whenever it is patched in.
Detail 04
Single unit
Treats one line. A rig with RF entering at several points may need more than one.
Final check
Know before you order
- 01Confirm the noise is radio interference, not a ground loop or bad cable
- 02Nothing bundled: no cables, no adapters, no mounting hardware
- 03Placement matters — try it at different points to find where RF enters
Product questions
Before you decide
Straight answers to the questions shoppers most often ask about this product.
01Will this fix my amp's hum?
Only if the hum is radio interference. A steady 60-cycle hum usually points to a ground loop or a power problem, which this does not address.
02Do I need power for it?
No. It is passive and works as soon as it is in the signal path.
03Where in the chain does it go?
In the line carrying the interference. Try it close to the input that is picking up noise, then move it if the buzz persists.
04Does it change my tone?
It targets frequencies well above the audio band, so audible tone should be unaffected.
