EDIT: for some reason Gearslutz won't display my images, so I just put the links to imgur underneath.
EDIT 2: Here's a link to the actual .mdat files: https://www.dropbox.com/sh/i3gvgex8o...TFa34KT4a?dl=0

Hi there,

I've been trying to get my room to sound better, but so far it doesn't look good, I suppose.

I have bass traps by GIK (Tri-Traps) and Hofa in all corners, and DIY basotect absorbers on the reflections points left and right of the listening position, and a few of those on the back of the room.

It still doesn't sound much better than before the treatment, and I think the measurements confirm that.

My room is 5.1m x 4.6m, ceiling height is 3.7m.
Unfortunately I'm facing the wide side of the room, for reasons.
the right side of my listening position has two huge windows.

Additional information:
My speakers are passive ATC SCM 20, and I used the Sonarworks measurement mic with REW (with the calibration file from Sonarworks). I had the mic at my listening position.

Here are the REW Screenshots:

Waterfall left:

https://imgur.com/awEMS5e

Waterfall right:

https://imgur.com/9OBBrtp

All SPL left:

https://imgur.com/Kyto6YW

All SPL right:

https://imgur.com/TmKiIkC

I'm willing to buy more products from either GIK or Hofa (or anyone else who's selling in Europe).
But what do I need? Is it as simple as More Bass Traps?

Thanks in advance!