The 4 ft separation is the best I can achieve given my room, I ran into space issues with my furniture and a fireplace on one side. The important things I did was to bring my speakers out far enough in front such that there is nothing barging into the sound (such as a sofa that partly impeded the sound cone, if you will - I am referring to the area the sound may emit into). I then angled them more towards each other (say roughly 35 degrees from the center line). If I stand roughly 4-5 feet from the speakers on the horizontal straight dividing them, or closer, I get outstanding soundstage, which varies as I walk close to the speakers in in interesting way. If I walk back further than 4-5 feet, there is a drop in soundstage. I am trying to adjust the angle now to bring the sweet spot closer to my sitting position, which is a good 9.5 feet away from where the speakers are at the moment. I am ordering a SPL meter to make this a little more scientific - saw a product named Galaxy Audio CM 140 on Amazon. This is cool stuff.
