AT-OC9/III

Overview

AT-OC9/III

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.

Features

Flagship model with extremely high-quality sound
Builds on the characteristics of the critically acclaimed AT-OC9ML/II
Special line contact stylus and solid boron cantilever with a 0.26 mm diameter
Neodymium magnet and permendur yoke significantly increase magnetic energy
PCOCC used for coils and terminal pins
Dual moving coil with high separation and wide response
VC mold for minimizing unnecessary vibration
Rugged body dedicated to achieving a design with increased rigidity

Specifications

Cartridge & Stylus
Frequency Response	15-50,000 Hz
Channel Separation	30 dB (at 1 kHz)
Vertical Tracking Angle	23°
Vertical Tracking Force	1.88-2.2 grams (standard: 2.0 grams)
Stylus Construction	Nude Square Shank
Recommended Load Impedance	Min. 100 ohms (when head amplifier is connected)
Coil Impedance	12Ω (1kHz)
DC Resistance	12Ω
Coil Inductance	25 µm (1kHz)
Output Voltage	0.4 mV (at 1 kHz, 5 cm/sec)
Output Channel Balance	0.5 dB (at 1 kHz)
Stylus Shape	Line contact
Cantilever	0.26 mm diameter solid boron
Static Compliance	35×10-6cm/dyne
Dynamic Compliance	18×10-6cm/dyne (100Hz)
Mounting	Half-inch
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
Mounting Feature	Half-inch mount
Stylus Curvature Radius	40 x 7µm
Type	Dual Moving Coil
Weight	8.0g
Notes	Note: moving coil cartridges require receivers or preamps with compatible inputs; their stylus assemblies are not field-replaceable.

Downloads

AT-OC9/III Manual