A record-breaking silent concert: 13,500 headphones per night and 40,000 fans in San Sebastián
Three nights in a row, more than 40,000 fans in total and an arena turned into a sea of wireless headphones: “Mitoaroa II”, the show by Basque band ZETAK, set a new world record for headphone concerts. At the heart of it all was Silentsystem SX-839 V2 HiFi technology.
Three unforgettable nights with more than 40,000 fans on headphones
From September 5 to 7, 2025, the Illunbe Arena in Donostia–San Sebastián hosted the largest silent event ever produced, with 13,500 wireless headphones handed out every night. Three consecutive days, one artistic vision, and a record that rewrites live music history.
Outside, near silence. Inside, a crystal-clear, powerful concert that changes the way you experience live music. A shared experience that is also deeply personal, made possible only by wireless technology.
40,000+ fans
Across the three nights — the crowd of a major festival, with the listening quality of a professional studio.
13,500 headphones per night
Handed out and managed every night by a team of technicians and volunteers, with distribution, charging and sanitizing between shows.
3 consecutive days
Unprecedented logistics for a silent event: three runs of the same show, with the same technical quality every night.
Illunbe Arena, San Sebastián
One of the Basque Country’s leading arenas, transformed for three nights into the stage for the largest silent concert in history.
Silentsystem technology at the heart of the show
What made it possible was Silentsystem technology: we supplied and managed the fleet of SX-839 V2 HiFi headphones. Designed for high fidelity, signal stability and extended battery life, these models kept thousands of listeners in sync at the same time, with a consistent experience in every corner of the arena.
An unprecedented production
The event called for meticulous planning: handing out and collecting tens of thousands of headphones every night, managing radio frequencies inside an enclosed arena, and handling charging and sanitizing logistics between shows. A team effort involving dozens of technicians to deliver precision and smooth operations at a scale the industry had never seen.
A world record
No headphone concert had ever reached this size. With more than 40,000 attendees in total, ZETAK and Silentsystem made history, showing how wireless technology can expand what’s possible live, respect the urban soundscape and open new horizons for the entertainment industry.
“With ZETAK, we took live music to a new dimension: a concert that’s silent on the outside, yet incredibly powerful and shared on the inside. At Silentsystem España, we’re proud to have made this world record possible right here in the Basque Country.”
— Fabrizio Baraldo, CEO Silentsystem España S.L.
ZETAK Mitoaroa II by the numbers
| Metric | Value |
|---|---|
| Total attendance | More than 40,000 |
| Wireless headphones per night | 13,500 |
| Consecutive nights | 3 (September 5, 6, 7, 2025) |
| Venue | Illunbe Arena, Donostia–San Sebastián |
| Headphone technology | Silentsystem SX-839 V2 HiFi |
| Technical partner | Silentsystem España S.L. |
Coming up next: Mitoaroa III in Bilbao
After Pamplona and San Sebastián, ZETAK’s trilogy continues with “Mitoaroa III”, scheduled for June 20, 2026 at San Mamés Stadium in Bilbao, aiming once again to push the limits of what’s possible. Silentsystem will be at ZETAK’s side for this new challenge too.
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Plan a silent concert with Silentsystem
Silentsystem designs and manages RF wireless audio systems for concerts, festivals and live events of any size — from 100 to 13,500 headphones and beyond. Contact us for availability, setup details and a quote for your project. Or write to us: Headphones for silent concerts.
