If you use ROON and want a pro to do the DSP for you remotely for your room (after you measure it). You use some free software and a decent mic for about $100 to measure the room via guided instructions.
Digital Room Calibration Services, Convolvers, Headphone Filtersets (accuratesound.ca)
The end result is called a Convolution Filter. This is a turbo charged DSP implementation for your room, your gear, and your seating position. The Convolution filter runs on your ROON Core. If you use JRiver it runs on that.
Since this filter runs on a computer there are no limitations on what it can do, unlike DSP built into some gear, such as a preamp.
Highly recommended by me.