The Ocharaku Flat4-Kaede The name Flat4 is derived from the description "Full-range 2-Element 4-Way Effect." According to the company website this 4-way effect is as follows: 1st effect Placement of opposed elements reduces mechanical vibration due to anti-resonance. 2nd effect Twin element parallel drive improves sound pressure sensitivity of low to middle frequency sound. 3rd...
● Thousand Sound TS842 The low range: Knowles 29689: 8mm in the original dynamic range to high range driver developed in-house Impedance: 55Ω Sensitivity: 102DB/1mw -Frequency band: 20Hz - 18kHz