Subnautica 2 Sonic Resonator Upgrade: How To Get Feedback Resonator

If you are searching for the Subnautica 2 Sonic Resonator upgrade, the item you want is the Feedback Resonator. The basic Sonic Resonator helps with close-range sonic interactions; the upgrade matters when the next route asks you to handle a target from farther away instead of swimming directly into the problem.

Quick Answer

Current Subnautica 2 guides point players toward scanning the Feedback Resonator upgrade fragments before crafting the upgrade at a Modification Station. Treat it as a route upgrade, not just a recipe unlock: prepare for the scan run first, confirm the crafting materials after the blueprint is available, and return with enough room to finish the upgrade cleanly.

What The Upgrade Changes

The normal Sonic Resonator asks you to get close. Feedback Resonator gives the tool a stronger reason to stay on your upgrade list because it adds a ranged option for sonic interactions. That can make a route feel less awkward when the obstacle or target is not something you want to hug at arm's length.

Do the upgrade when one of these is true:

• Your next exploration route keeps pointing back to a sonic tool check.
• You have already reached the upgrade-fragment area and can scan without forcing an underprepared dive.
• You want the ranged utility before committing to deeper or more exposed objectives.

Where To Scan The Upgrade Fragments

Start with the Feedback Resonator fragment route instead of wandering for generic tool fragments. Current guides describe the unlock as a two-fragment scan path and place it around a deeper Metal Farm-style route context, so use the map to check the approach, depth pressure, and nearby return landmarks before you leave.

If you are already preparing for rare material or farm-structure dives, pair the route planning with the Axum Bacterial Culture guide so you know whether one trip can cover more than one objective.

Before You Leave Base

The scan run is easier when you leave with a job list instead of a vague upgrade wish. Check oxygen margin, lighting, scan access, route landmarks, and the way back before chasing fragments in a deep structure-heavy area. If the map check already shows a long approach, give the run enough inventory and return space to avoid turning around for something obvious.

Open the world map before the dive if you still need to compare the route with nearby biomes, hazards, and resource stops.

Crafting Checklist

Once the Feedback Resonator blueprint is unlocked, move the question from "where is it?" to "can I finish it now?"

• Confirm the Sonic Resonator upgrade blueprint is available.
• Use the Modification Station rather than expecting a basic fabricator recipe.
• Check the current material list in your build before spending a long run on one missing component.
• Keep the finished upgrade in mind for the route that made you search for it in the first place.

Early Access Caution

Subnautica 2 is still changing. Fragment routes, crafting lists, and the best moment to make an upgrade can shift with Early Access updates. Use this guide to plan the upgrade chain, then recheck the current map and recipe screen before relying on an old fragment path or a fixed material count.