I completed the Blumenstein Depth of Field (DOF) modification on my 2.2 Mini-Max speakers (the minis prior to the Marlin and the MAX subwoofer).
Work of warning, be careful with the FOSTEX FF85WK drivers. I dented the dust cap on one and had to order a replacement. Actually, I replaced both of the drivers and now have one good spare.
I have been listening for about two weeks to the newly modded pair and feel the new drivers have gone through their breakin period and I am very please. These speakers were very good before the change but now I hear some improvement in clarity, quickness in response, and easiness with the music.
Last night I was listening at about half normal volume levels (using 300b Paramount amps with a passive preamp) to Fourplay, Robert Cray, and Joyce Cooling and was transfixed with the smooth sound and depth of each instrument and vocal. One of those late-night nirvana moments.