The Feedback Resonator is an upgrade to the Sonic Resonator tool in Subnautica 2 that allows players to fire projectiles from a distance to destroy bloom cankers and viral flowers [1, 2]. To unlock the Feedback Resonator blueprint, players need to scan two Feedback Resonators located near the Alien Ruins area [1, 2].
One is found on the Therapy Room section of the Cicada wreckage about 300 meters east-northeast of Iso’s Blackbox [1]. Another is located in the glowing green abyssal pool area known as Metal Farms, roughly 870 meters east of the Alien Ruins Research Base at a depth between 420 to 450 meters [1, 2]. A third Feedback Resonator, usable as a backup scan location, sits 20 meters east of Zip’s Blackbox near Troilite nodes [1].
Players require the Tadpole Depth Module to safely reach these deep locations, especially those near Metal Farms [1, 2]. Crafting the Feedback Resonator requires 1 Sonic Resonator, 2 enameled glass, 2 conduit crystals, and 2 strontium ingots [1]. These materials must be combined at the modification station after unlocking the blueprint [1].
Some sources dispute the number and location of Feedback Resonators needed to scan. One account states three exist, including one on an abandoned research platform, while another claims only the two in Metal Farms are required [1, 2]. There is also minor disagreement about the depth at Metal Farms, ranging from about 420 meters to 450 meters, near the maximum range of the Tadpole Depth Module [1, 2].
Currently, players scan the Feedback Resonators near the Alien Ruins and gather the necessary materials to craft the upgrade, which enhances their ability to manage dangerous plant threats at range in the game world [1, 2].
