IGS Audio Tubecore 500 Series Vari-Mu Compressor - Vintage King
Manley Labs Stereo Variable MU Limiter Compressor MSLCHP B&H
File:Vintage Grebe MU-1 Synchrophase With Gold-Plated Escutcheons, Battery Operation, Circa 1925 (9120006960).jpg - Wikimedia Commons
Michelin 16" Standard Inner Tube w/PV/PRV-78 Center Metal 90 Bend Tall Valve Stem (MT/MU/120-140/90, 150-160/80) - 55944 Harley Motorcycle - Dennis Kirk
xDuoo MU-603 Bluetooth DAC/Tube Preamplifier – Apos Audio