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Specific for SPU Mono and 78 rpm
12 dB gain
Made in Japan
Manufacturer : ORTOFON
Shipped within 3 to 5 working days Available within 1 or 2 weeks
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Of course, the output level of Ortofon’s cartridges is too low for a MM input. It is often unsuitable for traditional MC cartridges, which offer too much gain. Indeed, the output level of these SPU is 1.5 mV, which makes them a little atypical.
The ST M25 is specially designed to increase the voltage by 12 dB and to match the inputs of phono preamplifiers with a gain between 38 dB and 44 dB.
As both cartridges are monophonic, they supply the same monaural signal from both L and R channels. Therefore, the L and R channels of the turntable must be connected via the Ortofon ST M25 to the preamplifier.
The Ortofon ST M25 is equipped with a mono coil, so the signal is fully neutral.
Associated to the SPU Mono CG 25 DI MKII and SPU Mono CG 65 DI MKII cartridges, the Ortofon ST M25 transformer provides a powerful and dynamic restitution, while remaining accurate to the sound quality of early monophonic recordings.Franck
Recommended cartridge impedance: 5-50 ohms
Gain: 12 dB at 1 kHz
Bandwidth: 10 Hz - 100 kHz (+/- 1 dB)
Output: 47 kOhm / 200 pF
Dimensions: 65 x 39 x 98 mm
Weight: 0.410 kg
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