Subnautica 2 Feedback Resonator Guide: How To Get Both Fragments
The Feedback Resonator in Subnautica 2 is the upgraded Sonic Resonator needed to break hardened Bloom Cankers and progress the Axum Vision Adaptation path. The normal Sonic Resonator works earlier, but once Bloom Cankers become shielded or hardened, the game expects both Feedback Resonator fragments to be scanned first.
For more Subnautica 2 tool unlocks, material routes, and progression help, use the full Subnautica 2 guide collection.
Jump To
How To Get Feedback Resonator In Subnautica 2
To get the Feedback Resonator in Subnautica 2, scan 2 Feedback Resonator fragments, with one found in the Cicada Wreck Therapy Room and the other near wreckage in the Metal Farms area.
The Feedback Resonator is not a basic early tool. It is a modified Sonic Resonator connected to Axum technology and later story progression. The tool becomes important when the game introduces hardened Bloom Cankers that the standard Sonic Resonator cannot destroy.
This is where a lot of players get stuck. The Sonic Resonator already teaches the player to blast Bloom Cankers, then the Axum Vision path changes the rule by adding hardened or shielded cankers. If the old tool is not working, the answer is not to keep firing at the same target until the ocean feels bad for the player. The answer is to find both Feedback Resonator fragments.
| Unlock Step | What To Do |
|---|---|
| 1 | Progress until the Singh blackbox signal appears from the NOA Terminal. |
| 2 | Scan the first Feedback Resonator fragment inside the Cicada Wreck Therapy Room. |
| 3 | Scan the second Feedback Resonator fragment near wreckage in the Metal Farms area. |
| 4 | Use the Feedback Resonator to destroy hardened Bloom Cankers for the Axum Vision path. |
The unlock is simple once the route is clear, but the second fragment is far enough away that preparation matters. The Metal Farms area is not a quick early swim from the Lifepod.
Both Feedback Resonator Fragment Locations
There are 2 Feedback Resonator fragments in Subnautica 2. Fragment 1 is inside the Cicada Wreck Therapy Room, and Fragment 2 is near wreckage in the Metal Farms area around 2,100 meters east southeast of the Lifepod.
The first fragment is easier to follow because the Singh blackbox signal points toward the right wreck route. The second fragment is harder because the Metal Farms area is much farther away and tied to later exploration.
| Fragment | Location | Route Note |
|---|---|---|
| Feedback Resonator Fragment 1 | Cicada Wreck, Therapy Room | Follow the Singh blackbox signal from the NOA Terminal. |
| Feedback Resonator Fragment 2 | Metal Farms area | Search near wreckage about 2,100 meters east southeast of the Lifepod. |
Both fragments need to be scanned before the Feedback Resonator becomes available. Finding one fragment only starts the unlock. The second one is what finishes the path and lets the tool replace the basic Sonic Resonator for hardened obstacles.
Feedback Resonator Fragment 1 Location
The first Feedback Resonator fragment is found inside the Cicada Wreck Therapy Room after following the Singh blackbox signal from the NOA Terminal.
This is the cleaner fragment to grab first because the game gives a more direct route through the Singh blackbox ping. Follow the signal to the Cicada Wreck, then search inside the Therapy Room for the fragment. Scan it once found.
The important detail is the room. Reaching the Cicada Wreck is not enough by itself. The fragment is specifically inside the Therapy Room, so the player needs to explore the wreck interior instead of only checking the outside or grabbing obvious scans near the entrance.
| Fragment 1 Detail | Info |
|---|---|
| Area | Cicada Wreck |
| Room | Therapy Room |
| Signal | Singh blackbox signal from the NOA Terminal |
| Action | Scan the Feedback Resonator fragment |
If the Singh blackbox signal is not active yet, continue the current story and objective chain until the NOA Terminal gives the ping. The route is much easier once the marker is available.
Feedback Resonator Fragment 2 Location
The second Feedback Resonator fragment is near wreckage in the Metal Farms area, roughly 2,100 meters east southeast of the Lifepod.
This is the fragment that turns the unlock into a real expedition. The Metal Farms area is far from the early starting loop, so heading there without better oxygen, a clear route, and enough tool energy can turn a simple scan into a long swim of regret.
Once in the Metal Farms area, search the wreckage for the second Feedback Resonator fragment and scan it. After both fragments are scanned, the upgraded tool path opens and the hardened Bloom Cankers on the Axum Vision route can be cleared.
| Fragment 2 Detail | Info |
|---|---|
| Area | Metal Farms |
| Distance clue | About 2,100 meters east southeast of the Lifepod |
| Search target | Wreckage in the Metal Farms area |
| Action | Scan the second Feedback Resonator fragment |
The Metal Farms area also connects to later resource progression. If the route starts asking for advanced materials, the Subnautica 2 Troilite guide covers another important reason to learn this region.
The video below shows the Feedback Resonator location route if the Metal Farms fragment or Cicada Wreck route is easier to follow visually.
What The Feedback Resonator Does
The Feedback Resonator is a modified Sonic Resonator that can crack hardened Bloom Cankers and materials formed by bacterial action.
The tool uses a bioelectric feedback system based on Axum technology. In normal guide terms, it is the upgraded version of the Sonic Resonator for later progression barriers. It is not just louder. It is tuned to break things the original tool cannot handle.
The Feedback Resonator also emits a vortex ring, which behaves like a projectile blast. That makes it feel more like a fired resonance shot than the simpler Sonic Resonator function. The tool is still a resonator, but now with extra alien science and a strong “should this be legal” energy.
| Feedback Resonator Use | Why It Matters |
|---|---|
| Breaks hardened Bloom Cankers | Required for the later Angel Comb connected to Axum Vision. |
| Works on bacterial material deposits | Lets the player crack materials formed by bacterial action. |
| Fires a vortex ring | Gives the tool a projectile style blast. |
| Upgrades Sonic Resonator utility | Solves obstacles the normal Sonic Resonator cannot break. |
The short version is simple: if the Sonic Resonator is not damaging the hardened Bloom Cankers, the Feedback Resonator is the missing tool.
Feedback Resonator Vs Sonic Resonator
The Sonic Resonator destroys normal Bloom Cankers and earlier large deposits, while the Feedback Resonator destroys hardened Bloom Cankers and later bacterial material obstacles.
This tool split is the main reason the upgrade exists. Subnautica 2 first teaches the player to solve Bloom Cankers with the Sonic Resonator, then later changes the cankers into a harder version. The player is not doing the mechanic wrong. The mechanic has moved up a tier.
| Tool | Main Use | Limit |
|---|---|---|
| Sonic Resonator | Breaks normal Bloom Cankers and mines earlier large resource deposits. | Does not solve hardened or shielded Bloom Cankers. |
| Feedback Resonator | Breaks hardened Bloom Cankers and later bacterial material deposits. | Requires both Feedback Resonator fragments first. |
That is why the Feedback Resonator guide matters. Without it, the Axum Vision Angel Comb can look bugged or unclear. It is not bugged in that case. It is asking for the upgraded resonator.
How Feedback Resonator Connects To Axum Vision
The Feedback Resonator is required to destroy the hardened Bloom Cankers blocking the Axum Vision Adaptation.
Axum Vision is found much later than the first Adaptations. The route goes far beyond the early Lifepod area, past major progression steps like the Alien Base and Tadpole Pens. When the player reaches the Axum Vision Angel Comb, the Bloom Cankers are shielded or hardened and close up as the player approaches.
The normal Sonic Resonator cannot finish this cleanse. The Feedback Resonator is needed because it can crack hardened Bloom Cankers formed through bacterial action.
| Axum Vision Step | What Happens |
|---|---|
| Find the Angel Comb | The Axum Vision Angel Comb appears far east after major progression. |
| Try to cleanse it | The Bloom Cankers are shielded or hardened. |
| Normal Sonic Resonator fails | The cankers need the upgraded tool. |
| Scan both Feedback Resonator fragments | One is in the Cicada Wreck Therapy Room, and one is in Metal Farms. |
| Destroy the hardened cankers | Use the Feedback Resonator to finish the cleanse. |
Once the hardened Bloom Cankers are destroyed, the Angel Comb can be cleansed and the Axum Vision Adaptation path can continue. It is one of the clearest examples of Subnautica 2 using a tool upgrade as a story gate.
Feedback Resonator Tool Details
The Feedback Resonator is classified as a tool and works as a modified Sonic Resonator with an Axum based bioelectric feedback system.
The tool description explains that the upgrade replaces the original phased array with a living feedback system. Bacteria inside the emitter array respond to vibrations, listen to incoming and outgoing sound, and adjust the signal in real time.
That lore sounds wild, but it explains the gameplay. The tool is tuned to break hardened Bloom Cankers and bacterial material deposits because its signal is being modified through Axum biology.
| Tool Detail | Value |
|---|---|
| Category | Tools |
| Type | Sonic Resonator |
| Equipment slot | Tool |
| Energy per second | 0.1 |
| Energy cost | 2 |
| Charge up time | 1 |
| Projectile speed | 1000 |
| Projectile AOE radius | 300 |
The main gameplay takeaway is that the Feedback Resonator has energy use and charge behavior. Before taking it deep into a long route, make sure the tool is powered and the return path is clear.
Why The Feedback Resonator Is Not Working
If the Feedback Resonator path is not working, the most common issue is missing a fragment, using the Sonic Resonator on hardened cankers, or searching the wrong wreck area.
| Problem | Likely Cause | Fix |
|---|---|---|
| Sonic Resonator does not damage the cankers | The Bloom Cankers are hardened or shielded. | Unlock and use the Feedback Resonator instead. |
| Feedback Resonator is not unlocked | Only 1 fragment has been scanned. | Scan both fragments, one in the Cicada Wreck Therapy Room and one in Metal Farms. |
| Cannot find Fragment 1 | The wrong wreck room is being searched. | Follow the Singh blackbox signal and check the Therapy Room. |
| Cannot find Fragment 2 | The Metal Farms wreckage has not been reached. | Search near wreckage around 2,100 meters east southeast of the Lifepod. |
| The trip feels too far or dangerous | The route is later progression content. | Upgrade oxygen, tools, and vehicle support before pushing to Metal Farms. |
The biggest confusion is the Sonic Resonator itself. It still has a use, but it is no longer enough for the hardened version of the problem. That is the exact point where the Feedback Resonator matters.
Tips Before Searching For Feedback Resonator Fragments
The best way to search for Feedback Resonator fragments is to follow the Singh blackbox signal first, then prepare properly before heading out to Metal Farms.
The first fragment is more guided. The second is more of a real journey. The Metal Farms area is far enough away that oxygen, batteries, route awareness, and inventory space all matter.
| Tip | Why It Helps |
|---|---|
| Follow the Singh blackbox signal first | It makes the Cicada Wreck Therapy Room fragment easier to route. |
| Prepare before going to Metal Farms | The second fragment is far from the Lifepod. |
| Bring enough oxygen support | Long routes are much safer when oxygen is not the real boss fight. |
| Check tool energy | The Feedback Resonator uses energy and should not be treated like a free shot forever. |
| Do not force Axum Vision too early | The route is built around later progression and stronger tools. |
If Titanium Ingots are still blocking tool or vehicle upgrades, the Subnautica 2 Titanium Ingots guide covers the Processor setup and crafting chain needed for stronger mid game progression.
Final Blurb
The Feedback Resonator in Subnautica 2 is the upgraded Sonic Resonator needed to break hardened Bloom Cankers and progress the Axum Vision Adaptation route. To unlock it, scan 2 fragments: one inside the Cicada Wreck Therapy Room through the Singh blackbox route, and one near wreckage in the Metal Farms area about 2,100 meters east southeast of the Lifepod.
The normal Sonic Resonator is still useful, but it cannot solve every Bloom Canker problem forever. When the cankers become hardened, the Feedback Resonator is the answer. Find both fragments, upgrade the tool, crack the hardened cankers, and continue the Axum path. Very advanced. Very bacterial. Very much a tool that sounds like it should come with a safety waiver.
