If I understand your question correctly you will still need to add an external phono preamp stage to your line level input with the SUT.
This may indeed give you the results you are looking for depending on the phono preamp you choose and its synergy with the rest of your set up. Worth a try if you have the money and space for another component.
This may indeed give you the results you are looking for depending on the phono preamp you choose and its synergy with the rest of your set up. Worth a try if you have the money and space for another component.