Mesa Boogie Boogie 5-Band Graphic Equalizer - Used
Mesa Boogie 5 band EQ vs onboard GEQ comparo Mark IIC++ ESP Hanneman G12T-75 - YouTube
MESA/Boogie on Instagram: “Did you know the On Board Graphic Equalizer first appeared on a MESA/Boogie amp? The 5-Band Graphic EQ found on many of our Mark Series…”