There is a high pass filter built into the Zoom B3, BTW.
The Ac Bs Pre is a clone of the Fishman Acoustic Bass Preamp, which has a variable high pass filter built in. I don't have my pedal in front of me, but I think it's the 'depth' control that controls the cut off frequency.
Using that pedal you can cut out subsonics, have a flexible EQ in the same slot, a slot for a compressor, and still have another slot for an effect or cab sim. I've used it that way for a long time.