Seeking more 3d imaging, deeper/wider soundstage

These days I only sell 3 dimensional sound.

Onkyo is the cheapest brand I know to date which can create a wide an deep stage.

The other brands I use are: Primare and Pass labs.

You can look for a used Primare A30.2 or A33.2

Most brands are 2 dimensional: Marantz, Cambridge, Denon, Yamaha, NAD, Harman Kardon are all 2 dimensional.

* You have to understand that all parts of a set need to be able to give depth. In my tests I have proven that a 2 dimensional brand always will F....up the 3 dimensional stage. For example: a 2 dimensional source will F...up Always a 3D stage.

I call 2 dimensional audio Standard Audio. Because a simple amp of 100 dollar will build the stage the same way.

Have you considered tubes? Something like a Rogue Cronus integrated or their Atlas amp. (Neither have XLR connections, which are rare on affordable tube gear.). Rogue's tube gear is easy to maintain.

Your speakers are not that easy to drive. Maybe you can make a combination with Primare poweramp and Tube pre amp.

It can give you the drive and controle and tube sound togheter with your speakers.

yes I have considered tubes in the pre. I don't think my speakers would work with a tube amp. I have been toying with the idea of picking up a set of Focals someday, the tube amp might follow that.
I updated my system pics to show the new location for the rack and speakers.

Read the article " Room with no boundaries" and if that peak your interests, Master Handbook of Room Acoustics.

Early reflection from nearby boundaries arrive early in time and high in intensity. Those are the clues that we are in a small space.

Use diffusors to spread out the 1st reflection over time and reduce the peak intensity. By having some component of the 1st reflection arriving later in time and lower in intensity, your ears are fooled into thinking that you are in a bigger space, where the reflections arrive later and softer in intensity.

Bass traps or absorption would not create a larger stage. It will create a more focused soundstage.

Using non absorptive diffusor to the side or behind the speakers can create sound source broadening but do this with care as soundstage can lose focus.

Use absorptive diffusor at the 1st reflection point of the contralateral speaker, this would cut your crosstalk (eg. reflection of the right speaker off the left wall into your left ear), and help with widening soundstage.

Cables, electronics, AC regeneration or conditioning may help but will not overcome the bottle neck in room acoustics.

Resonators may also help but but that would be a mean a second sound source and can alter spectral balance.