Lehle D-Loop Stereo Effects Looper/Switcher – Chicago Music Exchange
Radial EXTC Stereo Effects Loop Interface - Westlake Pro
Twinline - Radial Engineering
BOSS IR-2 Stereo Effects Loop - YouTube
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
Minimal Series MIDI Dual Stereo Loop (OC-M-MDSL) – One Control USA
Stereo MIDI switcher of 4 guitar effects loops and 4 amplifier channels