Equalizer in a Hi Fi system


Just curious to hear everyone’s opinions on using an equalizer in a high end hi fi system. Was at work tonight and killing time and came across a Schitt Loki max $1500 Equalizer with some very good reviews. What are some of the pros / Benefits and cons in using one. Just curious. BTW. I’m talking about a top of the line. Hi end equalizer. Mostly to calm some high frequencies and some bad recordings. 

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XLR side, we short pins 1 and 3 to tie to shield of a 75 ohm coax cable to the RCA. Pin 2 on the XLR ties directly to the center pin of the RCA. 

That’s from Phil Tennison at Mogami. Regarding the Mogami Gold XLR to RCA 

The cables are ready to go. Full unity gain without any box in between. You don’t want ANY other box in the circuit. If had done all that in the beginning. When I discovered the Mogami Gold and that I didn’t need a box, SQ took a huge leap forward. 
how exciting!!  Which piece? Price range? New or used?