Designed to commemorate the release of the limited edition Technics SL-1200LTD and SL-1200GLD, the Ortofon Concorde Gold was made to compliment the attractive stylings of these limited edition turntables and to provide the best possible sound quality available in a DJ cartridge. These are extremely rare to obtain, especially as twin pack. Both Concorde cartridges had very limited operating hours, and are supplied as complete units. Two brand new, unused, detachable Concorde Gold stylus tips are supplied to fit onto the cartridges. The units have been tested and are operating perfectly. This Twin Pack comes complete with a metal flight case for easy portability (there is no needle brush part of the delivery). Specifications: • Output Voltage (@ 1kHz, 5cm/sec): 6mV • Channel Balance (@ 1kHz): 1.5dB • Channel Separation (@ 1kHz): 23dB • Channel Separation (@ 15kHz): 15dB • Frequency Response (@ -3dB): 20 - 22,000Hz • Frequency Response: 20 - 20,000Hz (± 2dB) • Tracking Ability (@ 315Hz): 80µm • Compliance (Dynamic Lateral): 7µm / mN • Stylus Type: Special Elliptical • Stylus Tip Radius (R): 13 / 25µm • Tracking Force Range: 2 - 5.0g (20 - 50mN) • Recommended Tracking Force: 3.0g (30mN) • Internal Impedance (DC Resistance): 750 ohms • Internal Inductance: 450mH • Recommended Load Resistance: 47kohms • Recommended Load Capacitance: 200 - 600pF • Cartridge Weight: 18.5g • Replacement Stylus Unit: Gold