Multiple Nexo Line Arrays For One 360° Stage In Mexico

This paper is available in French too

September 15 is one of the most important dates in the Mexican calendar; this year, it marked the 205th Independence Day for the country, with celebrations in the ZĂłcalo public square in Mexico City.
Multiple NEXO line array systems were deployed around a special 4-sided concert stage, with the full sound reinforcement specification running to 436 NEXO cabinets in total.

A large view of the Greek cross shaped stage. The need for additional speakers, the AlphaE-F, AlphaE B1-18 and GEO S8 is obvious seeing the distance existing between the main hangs of each stage and the distance between the stage and the area of overlap.

A large view of the Greek cross shaped stage. The need for additional speakers, the AlphaE-F, AlphaE B1-18 and GEO S8 is obvious seeing the distance existing between the main hangs of each stage and the distance between the stage and the area of overlap.

ZĂłcalo is one of the largest public plazas in the world. With live music, mass singing and fireworks, the event is attended by 40,000 spectators.

The main stage taking advantage of the longest hangs,16 M46/B112 + 2 M28 and 32 S118 on the ground.

The legacy stage with 2 arrays of GEO-D

The demanding job of providing sound reinforcement for the event was shared between five audio rental companies with a strong tradition of cooperation.

Sound designer Sergio Zenteno coordinated the pooling of equipment inventories from Tecnoson Espectaculos, ROA, Star, Backline and Concepto 3, to create a unique system that used 12x NEXO line arrays around the four-sided main stage to deliver 360° coverage.

Three sides of the stage used NEXO’s modular line array, the STM Series, as the main PA. The fourth, the Catedral side, deployed a NEXO GEO D system.

  • 18x STM M46/B112 per side + 2x M28 per side, with 36x S118
  • 12x STM M46/B112 per side + 2x M28 per side, with 24x S118
  • 12x STM M46/B112 per side + 2x M28 per side, with 24x S118
  • 16x GEO D per side, with 8x CD18 per side

Below the STM arrays of main and bass cabinets were NEXO’s latest addition to the STM Series, the M28 omnipurpose module, here used as a downfill. STM subs were groundstacked 3 high.

Two M28 used as downfills and aligned with the top M46, thus aside of the system M46/B112.

Two M28 used as downfills and aligned with the top M46, thus aside of the system M46/B112.

Nexo’s wall of sound, at least if we like the first two octaves, and made thanks to 38 S118 subs

Nexo’s wall of sound, at least if we like the first two octaves, and made thanks to 38 S118 subs


One out the four Geo S8 hangs used to fill the gap existing between the main hangs of each stage.

One out the four Geo S8 hangs used to fill the gap existing between the main hangs of each stage.

Additionally, there were four arrays of 12 x GEO S8 for frontfill at the corners of the stage, serving as front coverage 45° outside of the main arrays.
With the main arrays set at 17.5° off the horizontal axis, the systems achieved full 360° coverage.

The stage monitoring system used 52 pieces of NEXO PS15, with additional PS15s for for frontfill. Even the classic Alpha eF and eM/B1-18 cabinets were in action for sidefill.


Ready to roll and to yell, the AlphaE-F and AlphaE B1-18 help filling the audio gap close to the stage.

Ready to roll and to yell, the AlphaE-F and AlphaE B1-18 help filling the audio gap close to the stage.

A red shoot. Very dark of the forecasted SPL on ZĂłcalo plaza

A red shoot. Very dark of the forecasted SPL on ZĂłcalo plaza


STM’s modular design, teamed with NEXO’s standardised Universal Amp Racks (NUAR), makes it easy for PA rental companies to share hardware resources and collaborate on very large-scale concerts and events.

The huge stage built around the flag pole and the Mexican flag

The huge stage built around the flag pole and the Mexican flag

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