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I guess I just wanted a definitive LPF on that thing.
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OK, I'm thinkin' that you're just looking for a new toy (not that there's anything wrong with that).
The BFD with about 6 filters makes a 'definitive real' LPF. That leaves 6 filters to play around with for eq. Unless you buy an analog crossover, the new toy will employ the exact same DSP math that the BFD uses to create a filter set.
I use this LPF trick on my second system. It's an old analog processor that has a full range mains and sub out that I require a very low LPF on the sub to integrate properly with the sub. The sub LPF on its own amplifier doesn't go anywhere near low enough for my liking. I load the LPF filters in the upper 7 to 12 BFD slots and then don't touch them after that. Any eq is done using the lower filters from 1-6....
brucek