Trust Schiit Loki

"...low level evening listening it just gives that little bit of extra bass in the evening."

This is an appealing usecase. Do you have it installed between your preamp and the power amp? Also, do you find boosting the 20Hz signal blend well with your main speakers? I'm just concerned it might stand out as a "single note" bass and the main reason I've been avoiding the use of a subwoofer. My "main" speakers can go as low as around 45Hz.  

And where to find technical specs.

This guy's given some good info
https://www.superbestaudiofriends.org/index.php?threads/schiit-loki-eq-measurements.5153/

I have one and found it great with a other pair of speakers that needed lower mid boost to give the vocals some more body. 

Cheers George

Love Schitt!  No experience with the Loki but after 9 years of this crazy hobby I have tone controls on my AnthemI-225.  I find that I do use them on occasion but it’s more mood dependent than recording.  
I also am aware that different tone implementations yield different results.  Someone here was mentioning that they had the AnthemI-225 and moved to the Yamaha s1000 then S2000 (S3000? can’t recall) and they also stated the Yamaha's tone controls being better.

Interesting side note is that my Anthem’s tone controls disrupt the “purists” sound, and sound less intrusive, for a lack of better term, with my over the top speaker cables.  For further explanation, the tone controls, especially treble, is more satisfying with $2k Analysis plus cables vs $300 Signal Audio cables.  Go figure.

But yeah, whatever sounds best, do it.  I think it’s slightly comical that we’ll elevate cables, have everything placed within an 1/8 of an inch, panels hanging on our walls, sit in exactly the right place, but tone controls?  Oh hell no.  

Dsp is the future folks... 

Thanks a lot for the link George. Loki seems to paint with a very wide brush. 2khz and 4khz are about the same with the upper mid knob. For more precise adjustments you have dsp.

For more precise adjustments you have dsp.

Yeah you could go that way and say good by to the treasured sound of your favorite dac you spent $$$$$ on. And then instead listen to whatever unknown cheap delta sigma dac is inside the digital room/speaker/equalizer processor.
Me I prefer to list to the sound of my treasured MSB discrete R2R dac and use the Loki when I need it.

Cheers George