Improve the bass of earphones and headphones

This is a low frequency spartan improvement sound for earphones and headphones.
Try it on devices that don't have a smooth sound or bass that feels right.

*Volume setting
First, set the volume to low.
When the main program starts, turn up the volume to a slightly higher level.
After adjusting the volume, take the earphones or headphones out of your ears, as they will continue to play inaudible low frequencies.
Remove the earphones or headphones from your ears.

If the sound is distorted, be sure to turn it back up to an undistorted volume.
If the sound is distorted, be sure to return it to an undistorted volume.
If you continue to play with distorted sound, the balance may be lost or the equipment may be damaged.

The time it takes for changes to occur varies from device to device.
If you don't feel any change, please contact us.
If you do not feel any change, please try several times.

By concentrating on shaking the band that is rarely heard
It will bring out your sleeping potential.

Audio Content
Sine wave that continues to move up and down in the bass range
A kick sound that changes pitch.
The first half of the sound is EDM, and the second half is metal-like drums and bass.

Can also be used with speakers, but the ultra-low frequency range is very resonant through the walls.
Please be careful with the volume and time of day!