Wow!
Some of those amps would be overkill just for bass. Besides, the Pass's impedance and sensitivity are quite different than the VTL. You could also consider something like the Carver Pro series. For the frequencies your talking, watts count.
I can't offer advice on the crossover specs except that lower frequencies are less noticeable, particulary with hybrids, but that isn't the case here. I have never suggested biamping over 150 Hz but the Maggies may be the exception. The Marchands are top notch, except that they don't have the adjustable phase like sub xovers, such as the Paradigm X30. In my experience with Genesis 350's, which have their own bass amp/xover, phase can be important in less than 90 degrees at a turn. Sorry, if that just adds to the confusion.
You're doing something more advanced than most and you seem to have a good understanding. Ya, removing the passive parasites makes it more efficient but the speakers were designed with them. Perhaps the only people that know more would be Marchand and Magnepan.
I hate to say this, because they're great speakers and amps, but perhaps you're expecting more than they're designed to do. Have you considered adding a subwoofer, or two? Just separating the extreme lows (say 60 Hz) might help in your quest and avoid evisceration.
Some of those amps would be overkill just for bass. Besides, the Pass's impedance and sensitivity are quite different than the VTL. You could also consider something like the Carver Pro series. For the frequencies your talking, watts count.
I can't offer advice on the crossover specs except that lower frequencies are less noticeable, particulary with hybrids, but that isn't the case here. I have never suggested biamping over 150 Hz but the Maggies may be the exception. The Marchands are top notch, except that they don't have the adjustable phase like sub xovers, such as the Paradigm X30. In my experience with Genesis 350's, which have their own bass amp/xover, phase can be important in less than 90 degrees at a turn. Sorry, if that just adds to the confusion.
You're doing something more advanced than most and you seem to have a good understanding. Ya, removing the passive parasites makes it more efficient but the speakers were designed with them. Perhaps the only people that know more would be Marchand and Magnepan.
I hate to say this, because they're great speakers and amps, but perhaps you're expecting more than they're designed to do. Have you considered adding a subwoofer, or two? Just separating the extreme lows (say 60 Hz) might help in your quest and avoid evisceration.