Featuring a special line contact stylus on a 0.28 mm diameter solid boron cantilever the AT-ART9XI replaces the AT-ART9 as Audio-Technica’s flagship magnetic core MC cartridge.FeaturesFlagship Magnetic Core Moving Coil CartridgeSpecially Designed Magnetic Circuit PCOCC Coils Ensure High-Fidelity TransmissionDual Moving Coils Provide High Separation & Wide ResponseMachined Aluminum BaseSpecial Line Contact StylusEasy Installation to a Headshell or Integrated TonearmARTThe “ART” in the model number stands for Audio-Technica Reference Transducer a designation that they give only to their flagship phono cartridges. The specially designed magnetic circuit boasts an output voltage of 0.5 mV (1 kHz 5 cm/sec) making the cartridge easy to use and capable of reproducing even the most delicate expressions while also ensuring dynamic playback. The AT-ART9XI has also been designated an Audio-Technica Excellence Product a recognition that identifies products that meet their highest standards of high-fidelity performance.What's in the BoxAT-ART9XI Dual Moving Coil CartridgeNon-Magnetic Screwdriver(2) WashersCartridge Installation ScrewsSpecificationsFrequency Response: 20-50000 HzChannel Separation: 30 (dB at 1 kHz)Vertical Tracking Angle: 20°Vertical Tracking Force: 1.6-2.0 g (1.8 g standard)Stylus Construction: NudeRecommended Load Impedance: Min. 100 ohms (when head amplifier connected)Coil Impedance: 12 ohms (1 kHz)DC Resistance: 12 ohmsCoil Inductance: 25 µH (1 kHz)Output Voltage: 0.5 mV (1 kHz 5 cm/sec.)Output Channel Balance: 0.5 dB (1 kHz)Stylus Shape: Special line contactCantilever: 0.28 mm diameter solid boronStatic Compliance: 25 x 10-6 cm/dyneDynamic Compliance: 15 x 10-6 cm/dyne (100 Hz)Mounting: Half-inchCartridge Weight: 8.5 g (0.30 oz)Dimensions: 17.3 mm (0.68") H × 16.8 mm (0.66") W × 25.0 mm (0.98") DThreaded Hole: M2.6 x 2