How do i use this on monitors

i got two jbl 305 monitors
1 scalret 18i8
two cales with xrl to trs
how do i connect this ting on with the other things

http://www.music-group.com/Categories/Behringer/Signal-Processors/DI-Boxes/HD400/p/P0387

It’s pretty self-explanatory, if you’re fluent in English. Connect your interface output to “in” on the box. Connect your monitors to “out”. Left in ch1, right in ch2.

It may add noise, though. It’s behringer, which is generally bad.

Just don’t run your line cables too close to power. Run everything into a single power conditioner, not a power strip.