How to get the Feedback Resonator
Answer first
At a Modification Station, upgrade a Sonic Resonator after scanning two Feedback fragments. Against creatures, Feedback stuns instead of making them flee; it also clears the Alien Ruins Angel Comb's viral blooms. Search the Cicada Wreck Therapy Room and Metal Farm area; use the fragment landmarks in the steps below.
Fragment bearings and the third landmark can differ; use the named wreck/cave landmarks and confirm the station recipe before spending materials.
Field notes
| Materials | Sonic Resonator, Enameled Glass ×2, Conduit Crystal ×2, Strontium ×2 |
|---|---|
| Tools | Sonic Resonator, Modification Station |
| Depth / zone | Karakorum / Alien Ruins |
Steps
- Own a working Sonic Resonator and can reach Alien Ruins / Karakorum depths (Tadpole + Depth Module).
- Scan two Feedback Resonator fragments from these reported locations: Cicada Wreck Therapy Room; the glowing cave near Metal Farm; or another fragment within Metal Farm. The listed bearings conflict, so use these landmarks instead.
- Bring your existing Sonic Resonator, 2 Enameled Glass, 2 Conduit Crystals, and 2 Strontium to a Modification Station. If the ingredient list differs in your build, follow the station UI before spending materials.
Image: Original site diagram based on the listed recipe sources; no game asset - Use the upgraded Resonator to destroy / clear the viral blooms around the second Angel Comb; its creature interaction is a stun, not a flee effect.

Version differences and limitations
- The recipe is cross-listed by GamesRadar, GameSpot, GameWith, and other independent guides; exact fragment bearings and one additional fragment landmark still differ between builds.
Sources
- GamesRadar — Sonic and Feedback Resonators
- PC Gamer — Second Angel Comb needs Feedback Resonator
- PC Gamer — Conduit Crystal uses include Feedback Resonator
- GameSpot — Sonic and Feedback Resonator materials — Lists the Modification Station recipe as 1 Sonic Resonator, 2 Enameled Glass, 2 Conduit Crystal, and 2 Strontium.
- GameWith — Feedback Resonator recipe — Independent cross-check of the four material requirements; fragment route remains version-sensitive.
- Unknown Worlds — Subnautica 2 Buddy System Update — Official update: against creatures, Feedback stuns rather than making them flee. The same page still describes Feedback destroying Bloom Canker; verify both behaviors in your build.