Hi Salavat,
your Phoenix has 0.4mV output, yes?
A 30 dB SUT has a 31.6:1 voltage ratio. Therefore 0.4mV*31.6 = 12.64mV output of SUT secondary to your phono-pre ---- and that will pretty surly OVERLOAD your phono-pre input stage, usually starting to overload already if the above calculation gets to ~ 8.5mV
So, before you want to work on the impedance side of things, the first thing is to make sure you will not get into OVERLOADING the phono-pre input --- all else comes next.
Mid spec for phono-pre input is actually 4.7mV. Check any MM/MI cart output and it will give you a pretty good idea what seems an acceptable range: 3mV - 6mV, so 12.6mV is too much by far.
Only if you consider SUT primary or secondary resistive loading will this value it come down somewhat, but not enough by far for the above example.
Greetings,
Axel
your Phoenix has 0.4mV output, yes?
A 30 dB SUT has a 31.6:1 voltage ratio. Therefore 0.4mV*31.6 = 12.64mV output of SUT secondary to your phono-pre ---- and that will pretty surly OVERLOAD your phono-pre input stage, usually starting to overload already if the above calculation gets to ~ 8.5mV
So, before you want to work on the impedance side of things, the first thing is to make sure you will not get into OVERLOADING the phono-pre input --- all else comes next.
Mid spec for phono-pre input is actually 4.7mV. Check any MM/MI cart output and it will give you a pretty good idea what seems an acceptable range: 3mV - 6mV, so 12.6mV is too much by far.
Only if you consider SUT primary or secondary resistive loading will this value it come down somewhat, but not enough by far for the above example.
Greetings,
Axel