I have an old Sony STR-945 with three adjustable equalizer bands. I fooled around with it pretty extensively prior to being fitted with aids. I could adjust bass, mid, and treble, for frequency. I cannot remember what the range in frequency was for each band. Also, there is a level adjustment for each band of +/-10dBl. With my loss, I adjusted the bass to (if I remember correctly)250Hz, and level to -10dBl, the mid to 2.2KHz, -3dBl, and treble to 7.1KHz at +10dBl. Using headphones, fairly good Denon circumaural, I was able to listen to TV very comfortably in 2ch stereo at a much lower volume level than I could otherwise. I am sure with a little time and effort I could have tweaked further, but I got the aids and am still fooling with those. It appears that from your specs on your player that you have a range of +/-12dB or about 24 dBl total. That may not be enough to fully compensate your loss, but adjustments are a step in the right direction.
I have Phonak Audeo S IX and I find that listening in 5.1 surround, I seem to pick up some artifacts. I have boosted the center channel to try and clear up speech. So/so as yet. I am still debating as to whether I enjoy more with headphones and 2 ch. versus the aids. Of course, the headphones are a bit of inconvenience.
I have not fooled too much with music, but it is on the list. I hope I will not have to use completely different settings for TV versus music.