SUT vs. Phono preamp


On what basis is  the decision to chose  a SUT vs. a phonostage made?
boofer
A SUT can ring etc. so is not without possible sonic artifact. On the other hand a SUT more or less can't pass rfi which may bring a benefit to your phono considering the MC ultra high hf bump...so like most things audio comes down to specific implementation and pairing.
None are Rega; They are Benz Micro Gold, AT 33ev, AT F2, and your favorite Denon103D.  Haven't  tried it yet.  I usually use the vintage MMs, but recently wanted to play MCs against each other, which the Aria lets me do easily. MM's: At 12sa, at 440ml, shure v153 and M92e, Micro acoustcs 2002e,, Stanton 881s, and Empire 2000z, also  Goldring 1042, and many more.l The Stanton and Empire come in as  champions for overall performance..
Chckster: Forgot to mention OrtofonCadeza red as one of my MC's.
''additional amplification stage...will add some noise" (mikelavigne).
I use a SUT for carts with less than 0,2 mV output. However I
will start  not with ''theory'' but with practice. I own two phono-
pres both with 4 amplification stages. Basis Exclusive and Klyne
7PX 3.5 . Both recommend the use of the lowest amplification
stage in relationship to carts output. The ''theoretical'' assumption 
being ''the bigger amplification the bigger distortion''. I also own 
Denon AU-S1 SUT but use only with my Ortofon MC 2000 with
0.0 5 mV output. For outputs above 0.2 mV I don't need an SUT. 


None are Rega; They are Benz Micro Gold, AT 33ev, AT F2, and your favorite Denon103D.


LOL :))

 Haven't tried it yet. I usually use the vintage MMs, but recently wanted to play MCs against each other, which the Aria lets me do easily. MM's: At 12sa, at 440ml, shure v153 and M92e, Micro acoustcs 2002e,,

Never tried those, but my AT20SLa was very nice. 

Stanton 881s, and Empire 2000z, also Goldring 1042, and many more. The Stanton and Empire come in as champions for overall performance.

I can imagine, i tried 881s mkII and 980, you can always upgrade to higher Stanton model, the absolute best is SC-100 WOS (my favorite). 

If you like Stanton do you know that both Stanton and Pickering also available as a low impedance versions with extremely low output (just like MC) ? Here is the manual with specs. 

The Stanton 980LZS and PICKERING XLZ 7500S (AND XLZ4500S) are "low impedance" and will work directly into the Moving Coil (MC) input instead of MM input. It provides extended frequency response well beyond 50kHz. The 980LZS patented moving stylus system featured a Stereohedron nude diamond and ultra-low mass samarium cobalt magnet which allows it to track the highest levels found on the most sophisticated high technology records