MicroCoil™ Cartridge


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15-50,000 Hz


Audio-Technica’s AT-OC9/III MicroCoil™ Cartridge features a special line contact stylus embedded into a low-profile solid boron cantilever, ensuring the music signals read by the tip of the stylus are transmitted reliably to the coils. The cartridge’s “VC mold” design ensures stability and rigidity while the dual moving coil offers excellent stereo separation and improved frequency response for long-lasting performance. The use of PCOCC wire (Pure Copper by Ohno Continuous Casting), a special copper with virtually no transverse crystal barriers to impede signal transmission, perfects the performance of the advanced dual coil design.


Cartridge & Stylus
Frequency Response 15 - 50,000Hz
Channel Separation 30dB (1kHz)
Vertical Tracking Angle 23°
Stylus Construction Nude Square Shank
Recommended Load Impedance Min 100Ω
Coil Impedance 12Ω (1kHz)
DC Resistance 12Ω
Coil Inductance 25 µm (1kHz)
Output Voltage 0.4mV (1kHz and 5cm/sec.)
Output Channel Balance 0.5dB (1kHz)
Stylus Shape Special Line contact stylus (curvature radius: )
Cantilever 0.26 mm diameter solid boron
Static Compliance 35×10-6cm/dyne
Dynamic Compliance 18×10-6cm/dyne (100Hz)
Dimensions 17.3 (H) x 16.8 (W) x 25.7 (L) mm
Accessories Included One non-magnetic screwdriver; one brush; two washers; two 12mm mounting screws; two nuts; two 18mm mounting screws; one plastic protector; one set of PCOCC Lead Wires (AT6101)
Body Material Aluminium
Stylus Curvature Radius 40 x 7µm
Type Dual Moving Coil
Weight 8.0g



AT-OC9/III User Manual
Declaration of Conformity