Tech 21 Q-Strip EQ and Preamp Pedal Direct Box With 4-band EQ, LPF And HPF | Full Compass Systems
Other/unknown Broughton High Pass Filter - Pedal on ModularGrid
High-pass and low-pass filter on bass in the mix - YouTube
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
The Different Sounds You Can Create With A Step Filter Guitar Effect – FuelRocks
Maestro | Titan Boost
SOLD Broughton HPF variable High Pass Filter - Effects For Sale - Basschat