Summary: The RABOS system allows you to smooth out your most offending room mode. My studio is nearly square and I had a brutal 45Hz mode that rang like a bell. 10 min after plugging in the Cascade 12, mode is gone, in room bass goes to 20Hz before starting to drop of and it's tight and mean. I was just going to buy another one and noticed that the Harman store was all sold out. :( I don't need another, but I like have more than I need--call it greed.