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
Broughton Audio HPF/LPF with clean boost, new and boxed => 163GBP - Effects For Sale - Basschat
Other/unknown Broughton High Pass Filter - Pedal on ModularGrid
NPD Broughton High Pass Low Pass Filter : r/basspedals
Price Drops] Broughton Synth Voice Deluxe, Azure Drive & Proto DI - Effects For Sale - Basschat