This is a picture of the listening room I built at our old office before we moved. It was done on the Golden Ratio and measured less than 12 x 14 feet.

pictured are my Acoustat full range electrostatics on either side of the turn table. I still have them and use them regularly.

A picture of the right speaker reveals the right wall where I had large diffusers built into the wall.

As we get to the other end of the room I have another set of speakers so I can listen to either end of the room.

My corner horns featuring a single 6 inch full range crossoverless driver. Sitting just to the right of the corner horn is one of my original Radial loudspeaker designs in rosewood.

Between the speakers is an opening to a small alcove giving tremendous depth to the sound stage.

And here is the right channel.

And finally the right wall treated with an area rug.
My primary source in this room was my turntable featuring a Fidelity Research Silver wired Arm and MC202FR cartridge.

You can see pictures and descriptions in detail of all the gear I used in that room at the following link:
https://www.decware.com/myroom/myroom.htm-Steve Deckert