I found this Thread several days back and this is my first Post after catching up on all the posts.
I have owned 12 Orbs for about a year now. Five Mod2's and a pair of Mod1's. I have tried every configuration including the Mod4's. I find the Mod4's interesting! They add more presence but overall, I like the sound of the Mod2's the best. Maybe, because they have more power at 4 ohms versus 8. I went from a 5.1 channel setup to a 7.1 back down to 5.1 most recently. The reason for this is that I own the Trends 10.1 T-amps and found the sound most incredible when running only 1-channel off the 2-channel amp. I have five now and plan on adding two more in the not too distant future so I can enjoy 7.1 channels again. I run straight out of my OPPO DV-983H Universal Player into the amps using the OPPO's volume control for a purer sound. Also, I use a Sunfire True Subwoofer for the low end instead of the Uber's.
There's something that I notice when using the Orbs. Like many have stated already, there seems to be a bit of midrange suckout when using a 3 inch driver especially when choosing to use a crossover in the setup. I chose not to use a crossover recently because I find that it adds back a bit of the lost midrange suckout. These Orbs will play lower than many assume with the right amplification.
The main reason why I like the Orb satellites is that they use no crossover and one driver (as opposed to many other loudspeakers) to color the sound. Hence, no crossover equals no phase issues, better timing and minimum listening fatigue. Plus, round speakers generally have a wider dispersion pattern. Speaking of phase issues, I have found it best when the Orbs (especially the center channel) are mounted vertically (up & Down) as opposed to horizontally (left to right). Give it a try, you might be surprised at the difference.
What I'd like to see Orb Audio release in the future are a bigger satellite (possibly 5 to 6 inches in diameter but at least 4.5 inch) and a subwoofer in a metal enclosure with a passive radiator (10 to 12 inches in diameter).