Amazon.com: Simplurfi Stereo Array Spacing Bar Microphone Mount with Ruled Markings - Holds Up to 4 Mics - X-Y and ORTF Mic T-Bar Bracket, Fits 3/8" and 5/8" Mic Stands with Included
ORTF Stereo Microphone Technique - Microphones - Harmony Central
The Musician's Cheat Sheet for Stereo Mic'ing Patterns