Anyone tried the ACG Filter preamp? Looks pretty cool. I think I've tried almost all the preamps out there (Aguilar, Bart, Pope, Demeter...and many more). I think it's time to think outside the box. I like the Bart the best so far for the low Mids but I have to keep it flat (I have a passive switch on the bass and it sound very close to the bart pre set flat). Any preamp change just takes away from another frequency. From what ive seen on forums about the ACG is you can really fine tune all the frequencies with the filters. What do you guys think?