ZETAK and Silentsystem create the largest headphone concert in history ZETAK and Silentsystem create the largest headphone concert in history ZETAK and Silentsystem create the largest headphone concert in history By Silentsystem Audio|September 11th, 2025|Categories: Events, News, Silentsystem|Tags: 40000 headphones, Illunbe Arena, Mitoaroa, Mitoaroa II, San Sebastián, silent concert, silentsystem, Silentsystem audio, Silentsystem España, SX-839, ZETAK|
