C-type
Standard feature model : SONOROUS X, VIII
A three-layer filter is installed; an aperture has also been created on the inner aspect of the ear pad so that sound quality can be adjusted.

Combination with models other than the standard feature model >
SONOROUS VI, IV
Overall a soft, calm sound. In particular, low frequencies have a relaxed, soft sense of sound. A combination with which you can encounter new SONOROUS VI and SONOROUS IV sound.

SONOROUS III
The low frequency core is clear, making for solid heavy sound.
SONOROUS II
Low frequencies are increased, and sound has a thickness to it. Since high frequencies are also softened, overall sound is soft and calm.