That one would work! It is a two channel version of the one I use. The one I have has been in my rack for 16 years. The key is that it translates between unbalanced and true balanced signals, automatically, at either end.

https://www.bhphotovideo.com/c/product/161091-REG/Ebtech_HE_8_HE_8_Hum_Eliminator.html

I suspect even the cheap ones from Rolls and Behringer shpuld do the trick. here re some used ones on Reverb in the US

https://reverb.com/p/ebtech-he-2-dual-channel-hum-eliminator

sorry for so many replies, lol, the other issue (pasted from Joel Hamilton “…is that you really should’t be using the 1/4″ output, because you are actually going through an IC based buffer amp, rather than getting the actual tube goodness straight to tape (or DAW).

The 1/4” output is controlled by the knob on the right, and the pre itself is controlled with a single knob: the one on the left, for an all tube tape path… No IC’s, just great discrete tube goodness. The designer of this pre is really a creative, amazing designer, and this pre shows off his ability to make something at a price point, and have it actually rock! Even the “soft start” function for the phantom is unique, especially to this price point!”

i keep trying to answer here and the replies are not showing up

@gonguinguen I registered just to tell you this! I had the same issues and your post helped me understand what I needed to do. SO to get the benefit of having the 1/4 inch output with the level control, you dont have to go into a mixer or compressor, I have found that a Hum Eliminator, something like the EbTech hum eliminator that changes the balanced to unbalanced and vice versa works like a charm. They dont even have power, just transistors, super simple device, plug from the out of the 12ay7 to the in of the ebtech, and the out of the ebtech to the balanced/unbalanced, whatever you need of the interface or recorder.