DJ's all over the world claim very high demands to their professional equipment, among which the cartridges ``plays" their decisive part by realizing the scratching, back-cueing, and live artistic performance, as a big part of the show. Reliability and robustness is vital, when the cartridges night after night will have to withstand these demands in environments with extreme sound pressure and vibration.
Scratching and back-cueing impose heavy mechanical stress on the cantilever and its rubber bearing. Therefore, the Ortofon disco cartridges are equipped with cantilevers made from aluminum tube with increased wall thickness. Special attention has also been paid to the attachment of the bearing and the design of the bearing itself. This means that rough treatment will neither damage the cartridge nor degrade its stability.
The OrtofonPro cartridges were the first to combine the unrivaled Ortofon sound quality with the ruggedness that is a must for professional use.
Output voltage at 1000 Hz, 5cm/sec.: 6 mV
Channel balance at 1 kHz: 1.5 dB
Channel separation at 1 kHz: 23 dB
Channel separation at 15 kHz: 15 dB
Frequency range at - 3dB: 20-22,000 Hz
Frequency response: 20-20,000 Hz ± 2 dB
FIM distortion at recommended tracking force, DIN 45.542: < 1%
Tracking ability at 315Hz at recommended tracking force: 80 µm
Compliance, dynamic, lateral: 7 µm/mN
Stylus type: Special elliptical
Stylus tip radius: r/R 13/25 µm
Equivalent stylus tip mass: 0.5 mg
Tracking force range: 2.0-5.0 g (20-50 mN)
Tracking force, recommended: 3.0 g (30 mN)
Tracking angle: 20 degrees
Internal impedance, DC resistance: 750 Ohm
Internal inductance: 450 mH
Recommended load resistance: 47 kOhm
Recommended load capacitance: 200-600 pF
Cartridge color, body/stylus: Gold/Gold
Cartridge weight: 18.5 g
Replacement stylus unit: Gold.