Audio-Technica AT-OC9/III phono cartridge

Audio-Technica AT-OC9/III phono cartridge

"These cartridges are so competent and so well priced that they can't be ignored by their peers, and that includes some which cost several times as much."1

"The OC9/III is a clear step up from the 2M Bronze and a Concorde with a 40 stylus (basically an om40). More detail then either of those, wider/deeper soundstage, and less surface noise. It's also the best tracking cart I've ever had."2

"The perfect cartridge with which to enter the world of moving coils."3


Audio-Technica AT-OC9/III phono cartridge


Discontinued—Superseded by AT-OC9XML. Please refer to Related Products below.

Product Info


The Audio-Technica AT-OC9/III is the latest evolution of the Audio-Technica AT-OC9 cartridge originally launched in 1987. Over the years the Audio-Technica AT-OC series has undergone a number of model changes both inside and outside Japan, and it has continued to be a best seller for over 20 years. While drawing on the basic design of the Audio-Technica AT-OC9ML/II which has been available exclusively in overseas markets and which has received critical acclaim all these years, the Audio-Technica AT-OC9/III is the result of a fresh approach based on a thorough review of the stylus tip, cantilever, magnetic circuit parts, damper and other aspects designed to track and reproduce the highest sound quality. With the new Audio-Technica AT-OC9 III cartridge you will experience musical opulence and expressiveness of sound layered on depths of silence.

Customer feedback indicates the AT-OC9III offers exceptional musicality and performance comparable to the best cartridge regardless of price.

Special Features
- Special line contact stylus with solid boron cantilever
- Neodymium magnet and permendur yoke for increased magnetic concentration and energy
- PCOCC used for coils and terminal pins for pure electrical transmission
- Dual moving coil for high separation and wide response
- Especially strong and rigid VC mold holds the coils in place for minimized vibration
- Precision-crafted aluminum alloy body and hard resin structure designed for high rigidity, minimized vibration and improved signal to noise ratio
- Brass mounting screws designed to optimally produce high sound quality for the cartridge

Audio-Technica AT-OC9/III Phono Cartridge Specifications
- Tonearm mount: ½ inch
- Type: Moving coil
- Frequency response: 15Hz-50kHz
- Output voltage @ 1kHz,5cm/sec: 0.4mV
- Tracking force: 1.8-2.2 g (2.0 g standard)
- Recommended load impedance: Minimum 100 ohms
- Coil impedance: 12 ohms
- DC resistance: 12 ohms
- Channel separation @ 1kHz: 30dB
- Channel balance @ 1kHz: >0.5dB
- Dynamic compliance: 18.0 x 10-6cm/dyne (100Hz)
- Static compliance: 35 x 10-6cm/dyne
- Stylus type: Contact line diamond 0.0016 × 0.00028 inch
- Cantilever: 0.26 solid boron
- Vertical tracking angle: 23°
- Dimensions (mm): L25.7 x W16.8 x H17.3
- Weight: 8 g
- Accessories included: Nonmagnetic Screwdriver, washers, stylus protector, screws, nuts, stylus brush, PCOCC lead wire set

Please note: Moving coil cartridges require receivers and pre amps with special compatible inputs. Their stylus assemblies are not user-replaceable.


Footnote 1: This Stereophile review compares the OC9/III to the van den Hul MC-One and the Krell cartridges. Alvin Gold's review of the AT-OC9 is likewise provided. See both at Audio-Technica AT-OC9 Phono Cartridge.
Footnote 2: One of many quotes from forum discussion at
Footnote 3: See ToneAudio review at Audio Technica AT-OC9/III Phono Cartridge.

Customer Reviews