Shure Handheld Vocal Mics Compared: SM58 vs. Beta 58A vs. Beta 87A vs. SM86 - YouTube
Troubleshooting Shure SM58 - iFixit
Shure Beta 58 A Set – Thomann United States
Amazon.com: Shure BETA 58A Supercardioid Dynamic Vocal Microphone with A25D Adjustable Stand Adapter, 5/8” to 3/8” (Euro) Thread Adapter and Storage Bag : Musical Instruments
Amazon.com: Shure SM58 Cardioid Dynamic Vocal Microphone with On/Off Switch, Pneumatic Shock Mount, Spherical Mesh Grille with Built-in Pop Filter, A25D Mic Clip, Storage Bag, 3-pin XLR Connector (SM58S) : Shure: Musical