Let's start with your credential's. Playing the guitar and owning about 5-tube amps does not make you an authority on speaker design and sound propagation. Neither do taking college level courses in physics and calculus. Being a loudspeaker design engineer or a professional sound engineer might. As for your "humility", going around, without any real world qualifications and telling people the they are incorrect doesn't say much for your "humility", which is something else that, I don't know why it would enter into the discussion at hand. You did make it a point to quote me and then proceeded to go into into making suggestions as you do again about me "learning about audio", when I asked you one simple question. I did not attack you, I merely asked you this one simple question. I asked this question, because I had no ideal what your point is. I asked for a simple explanation, nothing more. You then, without explanation posted FIVE illustrations, without any captioning or explanation as to what each one of them represent and their relevance to this thread. Again, I asked another simple question. An answer such as something simple as "I was referring to four speaker's in the guitar cabinet" would have been sufficient. Now, I will answer. People have been putting four speakers in a single box, for many years before there were phased array speakers, such are used at most every major concert's today. The simple act of placing four direct radiating driver's in a single box, is NOT created a phased array or even anything close to resembling a phased array. With regard to the four speaker's in a single box thing was: I continue to stand by the above statement. If I had a 16' wide stage and I had four direct radiating speaker's each in an individual square enclosure and I were to place them across the front of the stage, at 4' intervals, it would disperse their sound fairly evenly out over the audience. If I took these same speakers and arranged them into a cube directly in the center of the stage, combined, they would create a sound pressure wave that would be +6 dB higher directly in front of this cube of speakers (than was in front of each individually separated enclosure). Being that we now have a SPL of an additional +6 dB directly in front of this cube of speakers, on axis, there will now be more sound being projected in one specific centralized area. That would raise the SLP of someone who is seated directly in the center of the cube stack of speakers, further back in the audience. However, for those who are sitting farther over in the audience, more to the right and left side of the stage, they will now be hearing sounds that are radiating from the stage, at a far lower SPL, than when these same speakers were lined up across the front of the stake, dispersing their sound more evenly throughout the audience. Sorry... But all this information that you have graciously provided with regard to phased array's is simply NOT applicable here. BTW, I am familiar with Meyer Sound and their products in general, that you quote here. I find that a simple guitar cabinet with four 10" speakers's "missing" from their line of phased array's of pro-sound speaker array's. Perhaps there is a reason for that? Well, I think I prefer to be not "fully informed", with regard to why there is four speaker's inside of one cabinet. All this time, here I was figuring that it was because it was easier to move and set up one single cabinet, than setting up multiple cabinet's.. OK Sherlock. I think that this will conclude any further discussion on my part. Have a Happy New Year!