I don't think it was hard to blend them, and not sure the human ear can tell the difference below 80hz. The 350's are up front and the 600 is in the back of the room. All the subs are calibrated to the same SPL 75dB seperately using a Radio Shack meter, and then all turned on. If I was to run them "hot" they would not be calibrated to the other speakers/sub. I can tell a huge difference if my 350's are turned off. The whole point is flatter freq response in all seats.


M80s VP180 4xM22ow 4xM3ic EP600 2xEP350
AnthemAVM60 Outlaw7700 EmoA500 Epson5040UB FluanceRT85