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ST M25 MC transformer
5 690,00 kr
Inkl. moms
ST M25 MC transformer
Ortofon ST-M25 Moving Coil transformer
ST-M25 moving coil transformer is designed exclusively for the SPU Mono CG 25 Di MkII and SPU Mono CG 65 Di MkII.
The voltage output of these cartridges is too low to connect to the MM -INPUT terminal of amplifiers or phono-equalizers, resulting in inadequate sound volume. ST-M25 is specially designed to increase voltage by 12dB to match MM input of the ordinary amplifiers or phone-equalizers.
These cartridges supply the same monaural sound from both L/R channels, therefore L/R channels of the cartridges should be connected through ST-M25 and amplifier to the final output “speakers (L/R) ". You can enjoy robust sound of monaural sound coming from L/R speakers.
ST-M25 transformer Technical data
- Frequency：10-100 kHz (+/- 1 dB)
- Step up：12dB (1 kHz) CA/CG 65 D (i)
- Input impedance：5 Ω - 50 Ω
- Load impedance： > 47 kΩ // 200 pF
- Dimensions： 65mm(W) × 39mm(H) × 98mm(D)
- Weight： 410
Download ST-M25 Userguide here
Why use a transformer?
Read our Transformers brochure
Step-Up Transformers (SUT) are a serious option for anyone who owns a Moving Coil (MC) cartridge, one that can significantly improve both the sound quality and sonic character. Quite simply, a good transformer is the best way to audition an MC cartridge with the highest performance possible.
Since the output of MC cartridges is lower than that of a Moving Magnet (MM), higher gain is required to utilize them, such as that provided by SUTs or MC phono preamplifiers. Although both devices provide this requirement, both are fundamentally different in function and in sonic character. This is where SUTs are frequently seen as superior; they are completely passive and offer exceptional noise performance and sound quality.
This is due to the fact that the structure of harmonic and intermodulation distortion is fundamentally different between MC-preamps and SUTs. While an MC pre-amplifier has a constant resistive input impedance, an SUT has an input impedance that is frequency dependent. The harmonic distortion produced by SUTs is highest at the lowest frequencies and drops as the frequency rises, whereas in most MC preamps the distortion increases as the frequency rises. Combined with significantly lower Intermodulation Distortion (IMD), the sound produced with an SUT will be much more open, dynamic, spacious, and natural.
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