TheGigRig elevates parallel effects mixing with Wetter Box
Amazon.com: NUX Loop Core Stereo Guitar Effects Looper Pedal, 6 hr Record Time, Stereo Audio, Drum Patterns, MIDI Control, Cab Simulation for Output to Mixer or Multiple Amps with Tonebird Power Supply
Radial EXTC Stereo Effects Loop Interface - Westlake Pro
Amazon.com: MOOER Looper X2 Stereo Electric Guitar Loop Pedal, Bass Guitar Looper Pedal, Acoustic Guitar Looper Pedal with 11 Banks, 300 Minutes, 77 save slots, Fade Out Function for practice and live
OBEL (On Board Effects Loop) TRS to RS and TS Signal Split For Jerry Garcia - PHRED - Eastwood Guitars
Buffer+ Stereo – Empress Effects Inc.
wiring diagrams
Lehle D-Loop Stereo Effects Looper/Switcher – Chicago Music Exchange
Stereo MIDI switcher of 4 guitar effects loops and 4 amplifier channels
Connecting Your UAFX Pedals – Universal Audio Support Home
Lehle D.Loop SGoS Effects Loop Switcher Pedal - Vintage King