XLR to RCA adaptors

I tried the Cardas a while back and eventually just had one end of the interconnects reterminated with RCA plugs.  If your system is significantly resolving and detail is important to you, then you will very likely notice a reduction in subtle inner detail and maybe more.   

rsf507 

... looking to use an existing RCA phono cable into a balanced Atmasphere pre that has a built-in phono

With that preamp you can use the RCA inputs and you'll enjoy all the benefits of a balanced connection.

Yup Ralph will tell you a MC cartridge with 0.25 mV or greater will work. Nope not even a 0.4 - 0.5 mV cartridge works with this phono. I've spoken to 3 other owners and all agree. 

Orchard Audio STEREO RCA TO XLR CONVERTER

https://orchardaudio.com/shop/stereo-rca-to-xlr-converter/?srsltid=AfmBOoprZDmh8_drDpMS2LvyQirwXmL42x-41ftsFWiZ-Q5rRYv8-X1o

awful expensive direct box that we use in the professional sound industry