Analog room correction for vinyl

You may want to look for ten or twelve band equalizers (or better yet parametric equalizers) from the 80's - 90's.  You can patch them into your system and equalize for the room without digital.  Not as versatile nor accurate as digital equalizing, but with no digital side effects.

DSP is great if you are domestically challenged. If you have flexibility the room acoustic treatment is better. 

It is not true that ALL soeakers are not well matched. My speakers are extremely close.

some need to stop gulping the kool-aide.

Excellent thread.
if you want a ‘room correction’ device try and find a Rives PARC it is all analogue but calculates in the digital I think - not just that but it works primarily in the bass where you get most room correction issues. Failing that consider subs by the likes of velodyn that do room correction. In the mid and treble room treatment is the way to go. If getting time alignment of drivers is what u need then go digital - you can do more with it. I am primarily analogue but I never dismiss digital

No acoustic treatment is going to solve bass issues in a room. For analog correction this is the ticket:
https://www.bhphotovideo.com/c/product/689907-REG/Millennia_NSEQ_2_NSEQ_2_Twin_Topology.html
Measure your room with REW and a calibrated mic and then correct the biggest peaks in the region below 200Hz with the NSEQ