Got this off of Ebay over a week ago, and finally got around to trying it out last night. WOW. I got this for a Warwick that I'll have soon, as it only has a 2-band eq.
My current, and soon-to-be backup bass, is an Ibanez Prestige BTB. It has a 3-band Bart circuit (the real US one), so no real need for it to need the BMC pedal, but I needed to test it out. My Ibanez sounds great, as is, so I plugged it into the pedal, and made the mid knob flat on the bass. I usually have the on-board mid cranked, so that's what I did on the pedal's level control, and then set the frequency.
Oh. My. God. THIS PEDAL WILL MAKE YOUR BASS GROWL AND ROAR LIKE NOTHING ELSE. HOLY CRAP. I have a tone now, that is a crisp, modern, and completely in-your-face monstrous. It sounds cliche, but it's like this thing took a blanket off of my sound! The frequency knob has such a wide range, and is VERY sensitive, so if you can't find your mid tone here, then you won't find it. I have mine set at around 2:00, and if you go all the way to the left, the mids go into serious low-mid mode, and combined with the bass band from your bass/amp, will rattle the f**king walls. I was impressed by how solidly this thing is built, too...got some weight for how small it is! Oh, and to get the most out of this pedal, use it with an 18-volt adaptor (more headroom).