The empty core MC type cartridge which followed the basic design of 50th anniversary model AT50ANV, and polished up details. Armature adoption made from a liquid crystal polymer equipped with the characteristic outstanding as composition material of a vibration system. By adoption of an establishment meter magnetic circuit, while being called the empty core MC type weak point, low-pass regenerative capacity power and zone balance are improved. The special line contact needle and phi0.26-mm solid boron cantilever which read a music signal with high precision. carrying out aluminum shaving appearance -- it is adoption about a base. The hybrid body which suppresses unnecessary parasitism resonance.