Ashidavox, a long-established Japanese audio equipment brand that has been producing a wide variety of professional audio products such as headsets for broadcasting stations and speakers for acoustic signals since its establishment in 1942, has developed the ST90-07, an even higher sound quality version of its very popular headphone ST90-05. The ST90-07 is an even better sounding model than the ST90-05 headphones, and it retains the same high quality of the ST90-05 headphones and uses high quality OFC (Oxygen-Free Copper) cables manufactured by Hisago Denzai Co. In addition, by optimizing the tuning, a natural and clear sound quality is achieved over the entire bandwidth. If you are looking for a clearer and higher quality headphone, this model is recommended.