ST-7 | Step-Up Transformer
A Step-Up Transformer is a serious option for someone who owns a Moving Coil (MC) cartridge. Since the output of MC cartridges is lower than that of a Moving Magnet (MM) they require higher gain to profit from their sensitivity and wide frequency response. This can be achieved either by pairing the system with a MC phono preamplifier of more efficiently by integrating a SUT to the system. The SUT offers a completely passive design and exceptional noise performance and sound quality as well as an input dependent impedance. 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. The sound produced with an SUT will be much more open, dynamic, spacious, and natural, making it the best way to audition an MC cartridge with the highest performance possible.
Compact and stylish, the ST-7 features a solid housing supported by four rubber feet, which help to reduce unwanted vibrations in the unit. Dual mono design, including individual shielding of the two channels, improves the imaging of the transformer and reduces the influence of environmental noise. High quality internal wires combined with gold plated terminals provide optimum signal transmission. Additionally, the sandwich winding structure used in the ST-7 significantly improves the high frequency response and provides exceptionally clear and open sound throughout the entire frequency range.
Recommended cartridge impedance: 2 – 60 Ohm
Gain: 24 dB at 1 kHz
Frequency response: 15-45 kHz (+0dB, -2.5dB)
Recommended load: 47 kOhm // 200 pF