The AT-MONO3/SP is a high-output (1.2 mV) moving coil cartridge designed specifically for use with 78 RPM mono shellac records.* Due to the horizontal configuration of its PCOCC (Pure Copper by Ohno Continuous Casting) voice coils, the AT-MONO3/SP cartridge only generates electrical signal with horizontal movement, yet it also has appropriate compliance in the vertical direction to keep groove wear to a minimum. The voice coils are wired in series, resulting in one mono signal that is transmitted to the cartridge’s white-blue terminals and red-green terminals in order to feed both inputs of a stereo phono preamp.
The cartridge’s low-mass 2.5 mil conical stylus is mounted on an aluminum cantilever for excellent tracking of the wider 78 RPM shellac grooves. The cartridge features a strong, rigid body of die-cast aluminum alloy and synthetic resin to eliminate unnecessary vibrations.
* This cartridge with 2.5 mil conical stylus is not compatible with microgroove 33-1/3 and 45 RPM vinyl records. It is designed to play 78 RPM SP (standard play) shellac records.
|Frequency Response||20-15,000 Hz|
|Vertical Tracking Angle||23°|
|Vertical Tracking Force||3.0-7.0 g (5.0 g standard)|
|Recommended Load Impedance||400-47,000 ohms*|
|Coil Impedance||40 ohms (1 kHz)|
|DC Resistance||40 ohms|
|Coil Inductance||190 µH (1 kHz)|
|Output||1.2 mV (at 1 kHz, 12 cm/sec)|
|Stylus Shape||2.5 mil conical|
|Stylus Type||Bonded round shank|
|Static Compliance||10 x 10-6 cm/dyne|
|Dynamic Compliance||3.5 x 10-6 cm/dyne (100 Hz)|
|Weight||6.8 g (0.24 oz)|
|Dimensions||16.0 mm (0.63″) H × 16.6 mm (0.65″) W × 26.5 mm (1.04″) D|
|Accessories Included||Non-magnetic screwdriver; 2 washers; 2 nuts; cartridge installation screws (13 mm × 2, 20 mm × 2); plastic protector; brush; PCOCC lead wire set|
Note: Stylus assembly is not field-replaceable.
* When connected to the MC input of a transformer-less phono pre-amp, choose a lower gain position due to the high output voltage (1.2 mV).