Mix Speaker's, Inc. were a Japanese visual kei rock band formed in early 2006.

Among their distinguishing marks were the two lead singers, Miki and Yuki, and elaborate monster and fantasy themed costumes.

Mix Speaker's, Inc. began preparing to debut on December 1, 2006, from the members of Isabelle and Egurigori (エグリゴリ).

Their first single, "Mix Speaker's, Box", was released prior to the band's official start, in December 2006.

Lemon Hall on Shibuya, Tokyo, on December 22. in 2009 and was titled "2nd Story Grand Finale [Big Bang Music!