Designed exclusively for the SPU Mono CG 25 Di mkII and SPU Mono CG 65 Di mkII models, the ST-M25 is a step-up transformer in which Ortofon engineers have concentrated their talent to achieve the most open sound reproduction possible during reading. of monophonic recordings with both 33 and 45 rpm microgroove records and the older 78 rpm Shellac records.
The motivation behind the ST-M25 lies in the low amplitude of the electrical signal delivered by the aforementioned pickup capsules, which makes its connection to the input for moving magnet (MM) capsules of the vast majority of amplifiers and inadvisable. phono equalizers, since in this case the result would be a volume level and dynamics that are not suitable for high-quality listening.
As a consequence, the STM25 is specially designed to increase the output voltage of the Mono CG 25 Di mkII SPU and the Mono CG 65 Di mkII SPU by 12 dB in order to achieve a perfect adaptation of them with the corresponding circuitry. to the MM input of conventional audio electronics.
Characteristics:
- High-performance step-up transformer for monophonic MC capsules.
- Designed for the Mono CG 25 Di mkII SPU and the Mono CG 65 Di mkII SPU.
- 12 dB gain at 1 kHz.
- Frequency response: 10 - 100,000 Hz, +/-1 dB.
- Recommended internal impedance of the capsule: 5 - 50 Ohm.
- Output signal loading: 47,000 Ohm/200 pF.
- Very high quality RCA connectors.
- Dimensions: 65 x 39 x 98 mm (W x H x D).
- Weight: 410g.
