Corn - i took a quick look at your diagram and from what i could tell, your listening couch backs up to the kitchen/counter/bar object? And, is a bit higher than your ears, sitting down, so in effect, it is like sitting very close to the back wall? If you tried speaker placement on the long (or side) wall, that may still put you in the same place, in that your seat will be against the wall behind you (the other side wall). So, I'm not sure you have many alternatives on that, other than to have a small chair that can be easily moved closer to the center of the room, and closer to the speakers and further away from the kitchen as back wall, at least for solo/critical listening.
You could do some sort of drop down acoustic blind to 'block' the kitchen if the backsplash is highly reflective, but you might want to see how the room sounds first. My biggest concern, frankly, is that your listening area is close to noisy appliances, refrigerator compressor hum, maybe some noisy low voltage lighting, etc. As long as you are ok with semi-nearfield listening, having a smallish room isn't so bad, and you could use your furniture, selectively, to absorb. Diffusers are pretty effective, but i think you'll need to wait until you get in there and experiment a little. You may be pleasantly surprised (and if in an apartment building, you will have limits placed on how loud you can play, based on whether you want your neighbors to hate you.
Good luck, not sure I helped.
You could do some sort of drop down acoustic blind to 'block' the kitchen if the backsplash is highly reflective, but you might want to see how the room sounds first. My biggest concern, frankly, is that your listening area is close to noisy appliances, refrigerator compressor hum, maybe some noisy low voltage lighting, etc. As long as you are ok with semi-nearfield listening, having a smallish room isn't so bad, and you could use your furniture, selectively, to absorb. Diffusers are pretty effective, but i think you'll need to wait until you get in there and experiment a little. You may be pleasantly surprised (and if in an apartment building, you will have limits placed on how loud you can play, based on whether you want your neighbors to hate you.
Good luck, not sure I helped.