Placing them face to face with one speaker hooked up in reverse polarity will result in the acoustic cancellation of most of the sound. The blanket just takes it a step further. When implemented you can turn the volume up real loud, have the drivers pumping and have very little acoustic output. A tried and true way to break-in a pair of loudspeakers.
Focal Diablo / Utopia III breakin really long?
I've purchased a new pair of Focal Diablos. When the speakers were first installed for a day or so they were good though the midland and up had a pretty coherent image. After the first few days they really lost some life, weird. I was warned that this would occur and the magic would reappear after break in but I didnt really expect this. This pair now has around 300 hrs on them. I don't know how many music hours it will take for them to break in and open up. Any Diablo or other Utopia series III owners out there that have experienced this?