2. analog
  3. 180879-41852

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 billstevenson

billstevenson
345 posts
 

An interesting discussion for sure.  I have to laugh concerning the argument that transformers insert distortions, whereas active circuits using transitors somehow do not.  We are talking about playing vinyl records people.  Everything has distortion.  If we really want to reduce "colorations/distortionns" to the maximum extent possible, we should all pull up stakes and move over to the digital realm completely.  I must reinforce the points made by mulveling as my experiences are very similar.  I have a Conrad-Johnson TEA1-series 3 with built in SUT and although it is very good, it is not as good as any of several external SUTs that I own.  I have a couple of different active phono stages that probably have lower distortion than even my best SUTs, but they don't satisfy my ear as well as the best of the transformers, which is a hideously expensive one made in Germany wound with silver wire.   I have a Bob's Devices one that sounds lush and warm, overly so for me.

My advice to anyone starting out?  Try them out, find what you like.  Satisfy your own self.  In spite of the admonitions to the contrary, the only truth in analog is your own taste.

billstevenson
345 posts
 

R,

If you are sincere, I commend DSD to your attention.  Otherwise, I think you are on a quest that is analogous to slaying windmills.

I will stand by my advice to make yourself happy, play what pleases your ears and when it comes to analog, especially analog, recognize that it is perfectly OK to prefer tubes and SUTs.  It is perfectly ok to prefer a matched pair of transistors too.  The only thing that matters is the music.

Bill

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