The AT-ART7 keeps the basic design of non-magnetic core MC type cartridge AT50ANV & changes the coil winding frame from a pure titanium armature to a newly developed liquid crystal polymer armature by an injection moulding. This product also succeeds in reducing the weight of the vibration system compared to AT50ANV & provides the extremely natural & clear sound quality with the ability to express three-dimensional sound fields inherent to non-magnetic core types. In addition this product enables an output voltage of 0.12m V a relatively high output level for a non-magnetic core system.