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SUT - electrical theory and practical experience

Some vinyl users use a SUT to enhance the signal of the MC cartridge so that it can be used in the MM input of a phono stage.  Although I don't understand the theory behind it, I realize that a SUT should be matched individually to a particular cartridge, depending on the internal impedance of the MC, among other things.  

Assuming an appropriately / ideally matched SUT and MC, What are the inherent advantages or disadvantages of inserting a SUT after the MC in the audio chain?  Does the SUT theoretically enhance or degrade the sound quality?  What does the SUT actually do to the sound quality? 

Thanks. 

drbond

Showing 2 responses by erik_squires

erik_squires
15,803 posts
 

 

erik_squires
15,803 posts
 

I can only speak a little to the theory.  A step up transformer works on the same principle of voltage transformation used for AC power products.  For instance, when you buy gear designed for US voltages but want to use it in Japan.  Transformers can convert one voltage to another, but the power on either side of the transformer is roughly the same (minus losses). 

That is, a 100V to 120V transformer will still have the same power (current x voltage) on either side, 

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