Variable 20Hz...200Hz Hi Pass / Low Cut Filter - freestompboxes.org
Broughton (HPF) High Pass Filter Pedal | Reverb
Used Broughton Low + High Pass Filter Bass Effect Pedal | Musician's Friend
Genzler Amplification - INTRODUCING: The re/Q DUAL FUNCTION EQ PEDAL The re/Q™ DUAL FUNCTION EQ PEDAL is a low noise, ALL ANALOG multi-function HIGH PASS FILTER – LOW PASS FILTER and 5
High Pass Filter / HPF kit PRO GUITAR-ELECTRONICS.EU
SOLD - Broughton Audio HPF High Pass Filter | TalkBass.com