Okay, these are not fancy at all in terms of either the image quality or the shooting technique. But the subjects are not available at any retailers for different reasons and built by me. So, my post should fit here.
#1: a passive direct injection box.
#2: a 2-pole active low-pass filter good for the reggae sound and the simulated synth bass sound.
#3: an overdrive pedal based on the classic "Alembic Strato Blaster" circuit.
#4: an active preamp with a 2-band EQ whose circuit board was designed and built by a professional engineer, built into this small die-cast case by me.