EQ for hifi stereo


Is there a product that can be use with a stereo system: amp Moon W5 LE/ preamp  LS 26/ CD Player Moon Supernova/ and turntable use as room correction and also EQ ?  Will it harm the music presentation as definition: stamp of instrument, holographique music scene presentation ?  Have you try some of these components ?
audiosens
Buy a vintage SAE multi-band equalizer! Excellent gear - I own a nice collection of SAE!
The Schiit LOKI is a high fidelity tone control that works very well and is some what inexpensive.
The Loki also has a bypass switch. I'm considering getting one to help try to correct some of the deficiencies I hear in newer CDs I've ripped and some download files. Not sure if it will help but the Loki is only $129 new.

My question is where in the chain to put it? Before or after the DAC?