I use my SF-2 with the same goal as Michael D., but with an almost opposite approach. I run my SF-2 in series mono--i.e., in stereo, with a jumper from the A output to the B input. I set channel A as a high pass filter, frequency usually around 40, but sometimes as high as 100 depending on the room. The low frequency rolloff this introduces works very nicely with the low B string of my Rogue 6's, and I can use the damping control to add low end boost as necessary. I set channel B as a low pass filter, with the frequency at 5K. Back when I was playing Epics and Orions, I would turn the resonance control up all the way to get the sounds I now get from the onboard filter and Q switch in my Rogues. These days I rarely turn up the channel B resonace control.
This approach allows me to filter out muddy, power hungry subsonics. If I wanted to add them back in, all I'd have to do is turn up the channel A direct knob, and there they are. This, BTW,is why I run the SF-2 in series mono instead of the standard mono mode. In standard mono, the B channel lowpass signal would still contain the subsonics I'm filtering out with channel A, regardless of the direct level setting. Being able to fine tune the frequency range of my system in this manner really works for me--YMMV.
Kent
Oh yeah--here's my signal path
Demeter VTBP-2 preamp
SF-2 in Demeter loop
BBE 461 Sonic Maximizer (the 30 HZ shelving low countour control comes in handy sometimes)
Rane DC24 crossover/compressor/limiter
Crown Power Base 2
Pacific 15 w/ Fane Colossus for lows
Ampeg 810 (early 70's) for highs, sometimes replaced by Pacific 210 w/ Fanes. One of these days I'm going to have a 410 built that's basically half the Ampeg--no ports, no tweeters.
