What size screw thread is found on the bottom of the Yoyo (S)? April 11, 2024 10:10 The Yoyo (S) has an internal 1/4" 20 UNC screw thread. This is the standard for most speaker stands and mounts. Related articles There is no firmware information available for the Yoyo (S) as these cannot be updated. Why does my Yoyo (S) turn off whilst music is playing? How do I use the aux input on the Yoyo (S)? Can I replace the battery for the Yoyo S? What is the size of the screw thread on the Yoyo (M)'s?