「Awesome Device」consist of 6 pins and 6 rings that put on the strings and under the pins. It can boost the mid-low-frequency, and stronger the sound, and we provide two types of material to choose which are 「ebony」and 「bone」.

 Ebony:

1.Fuller the mid-low-frequency.

2. The sound is powerful.

3. Increase the volume.

Bone:

1. Clear the mid-high freq.

2. Widen the sound 

3. The sound is brighter.