Compact and stylish, the ST-7 transformer features a solid housing supported by four rubber feet, which help to reduce unwanted vibrations in the unit.

The 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.

The ST-7 transformer is a perfect match for, among other MC cartridges, the MC Quintet Series and SPU Classic models.
 
Compact and stylish
Sandwich winding structure
Permalloy shielding housing for the left and right channels separately

Ortofon ST-7 transformer    ​    ​
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Technical data:
• Frequency response: 15-45 Hz (+0dB -2,5dB)
• Gain: 24dB at 1kHz
• Recommended cartridge impedance： 2Ω - 60Ω
• Recommended load： 47kΩ//200pF
• Dimensions： 122mm(W) × 43,5mm(H) × 102mm(D)
• Weight： 790g

What do these do?

SUT    These transformers are used for connecting a moving coil cartridge MC (on a turntable) to a MM phono preamplifier, MM phono input of a receiver, or your systems MM preamp.to boost output  from a MC Moving Coil Cartridge