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Orange orbs

Phonic Gain produced by Hibiki's friends singing

Phonic gain (フォニック ゲイン Fonikku Gein?) is the most basic principle of the Symphogear system. By using the power of song, a potential candidate provides power to their Symphogear.

However, this principle has also been used by non-natural candidates, and it is when that happens that abilities like the X-Drive can be unlocked.

Major Occurrences

In Episode 1, the phonic gain produced by Zwei Wing and the people at the concert hall was enough to activate the Nehushtan Armor.

In Episode 5, Hibiki Tachibana was able to produce enough phonic gain to activate and restore the Durandal.

Hibiki hears the anthem

Hibiki's strength is restored by hearing her friends singing

In Episode 12, the phonic gain produced by all of Hibiki's friends singing Shiritsu Lydian Ongakuin Kōka was enough to permit Hibiki, as well as Tsubasa and Chris, despite the damages taken after their attempt to stop and destroy the Kadingir, to unlock their X-Drive.

In the last episode of G season, the phonic gain produced by the whole world was used to reactivate the Lunar Ruins, thereby preventing the Moon from crashing into the Earth, as well as allowing all six Symphogear users to unlock their X-Drive.

In the Episode 12 of GX season, the phonic gain produced by Carol Malus Dienheim song, which had the same power as 7,000,000,000 Superb Songs, was exploited with the S2CA Hexa-Conversion to once again allow all six Symphogear user to unlock their X-Drive.

Trivia

  • Some fans have theorized that a user can feed off phonic gain while another is singing in battle.
  • Phonic gain normally looks like yellow orbs of light. But when powerful, it looks like a large yellow cone.