Hi Bruce,
I went through the spec numbers for your components, and I think that you will need a SUT. Without it, the numbers are marginal at best with respect to both having enough gain to drive your amp to full power, and having adequately low hiss levels.
Another way to look at it is that the 20XH listed in your system description is spec'd as having a 2.8 mv nominal output, which is 20 db higher than the 0.28 mv figure you cited. If with the 20XH you ever use your volume control above say the lower third of its range, I suspect that you will not be able to turn it up by 20 db (which is subjectively about 4 times as loud, for a given input level) without either running out of range or having excessive hiss levels.
I have no specific SUT recommendations to offer.
Best regards,
-- Al
I went through the spec numbers for your components, and I think that you will need a SUT. Without it, the numbers are marginal at best with respect to both having enough gain to drive your amp to full power, and having adequately low hiss levels.
Another way to look at it is that the 20XH listed in your system description is spec'd as having a 2.8 mv nominal output, which is 20 db higher than the 0.28 mv figure you cited. If with the 20XH you ever use your volume control above say the lower third of its range, I suspect that you will not be able to turn it up by 20 db (which is subjectively about 4 times as loud, for a given input level) without either running out of range or having excessive hiss levels.
I have no specific SUT recommendations to offer.
Best regards,
-- Al