Tech 21 Q-Strip EQ and Preamp Pedal Direct Box with 4-band EQ, LPF and HPF, XLR Output and 9V Phantom Power - Zorro Sounds
Bass Guitars And High Pass Filters – FuelRocks
Q\Strip – Tech 21 NYC
Other/unknown BROUGHTON Low + High Pass Filter - Pedal on ModularGrid
NPD - Broughton Low + High Pass Filter. Does a great job of cleaning up muddy low end and hissy high end frequencies I don't want. Just the creamy middle! : r/BassGuitar