|Warranty length||2 Years|
- Type: Moving coil (MC)
- Frequency response: 15 to 50,000 Hz
- Output voltage: 0.4mV (1 kHz, 5 cm/sec)
- Channel separation: 30 dB (1 kHz)
- Channel balance: 0.5 dB (1 kHz)
- Tracking force: 1.8 to 2.2 g (standard 2.0g)
- Coil impedance: 12Ω (1kHz)
- DC resistance: 12Ω
- Recommended load impedance: Min 100Ω
- Coil inductance: 25µH (1 kHz)
- Static compliance: 35 x 10 - 6 cm/dyne
- Dynamic: 18 x 10 - 6 cm/dyne (100 Hz)
- Stylus: Line contact stylus (40 x 7µm)
- Cantilever: 0.26 mm diameter solid boron
- Vertical tracking angle: 23 degrees
- Dimensions (HWL): 17.3 x 16.8 x 25.7mm
- Weight: 8.0 g
Audio Technica AT-OC9 III moving coil phono cartridge replaces the critically acclaimed AT-OC9 II model, a precision design that gives a highly detailed yet forgivingly smooth sound suitable for a wide range of music.
Special Line Stylus
AT-OC9/III features a special line contact stylus with a 40μm x 7μm curvature radius at the stylus tip, embedded into a low profile solid boron cantilever. This ensures the music signals engraved in the analogue records are read out completely and gives expression to the highest dynamic compliance of the series.
By firmly embedding this line contact stylus in a solid boron cantilever with its 0.26mm diameter and bonding it in place, the music signals read by the tip of the stylus are transmitted reliably to the power-generating coils.
The magnet is a neodymium magnet with a maximum energy product BHmax of 50[kJ/m3] while a permendur yoke is used with a high saturation flux density and excellent magnetic materials. Together, they further boost the magnetic field concentrated in the coil gap area.
PCOCC (Pure Copper by Ohno Continuous Casting) allows audiophiles to enjoy pure transmissions as it does not raise the crystalline interfacing in the transmission direction. PCOCC is a special copper with virtually no transverse crystal barriers to impede signal transmission. Using it in the coils and terminal pins perfects the performance of the advanced dual coil design.
Dual Moving Coil
This unique MC type cartridge has a basic structure where one cylindrical coil is used for the left channel and another is used for the right channel providing outstanding separation characteristics. AT OC9/III adopts a reverse V-shaped formation for the two left and right coils to reduce the vibration mass from the stylus tip and minimise unnecessary coil movements further diminishing distortion.
The leakage of signals from one channel into the other exerts a decisive influence on the stereo expanse and sound quality since leakage is tantamount to creating irregular cross modulation. The reason why the dual moving coil system delivers such a clear and finely delineated sound quality is no doubt due to the system’s naturally excellent separation.
The VC mould that holds the coils in place is made of a hard synthetic resin which is combined with potassium titanate for increased strength and rigidity and reduced vibration. This design ensures stability whilst the dual moving coil offers excellent stereo separation and improved frequency response for long lasting performance.
Using a precision-crafted sturdy aluminium alloy as the base, the structure is made of hard resin that maintains minimal resonance. Undesirable vibration is reduced while the bottom of the body is plated to achieve greater rigidity and an improved signal-to-noise ratio.
"Strong imaging, excellent treble detail, improved bass response." (Hi-Fi World Magazine, May 2012)
"New version of respected cartridge with a very defined sound." (Hi-Fi World Magazine, May 2012)