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Upgraded audio system at Chase Field powered by Cohesion CO12

Chase Field, located in Phoenix, Arizona, and home of Major League Baseball’s Arizona Diamondbacks, raised another National League pennant this past year. The championship banner gained company with the completed integration of a new Cohesion system, featuring the first permanent installation of Cohesion CO12 loudspeakers.

Opened in 1998, the 48,330-seat retractable-roof stadium has, over subsequent decades, augmented its year-round entertainment offerings beyond baseball. The Chase Field executive team envisioned attracting a wider range of high-profile events with an upgraded PA at the venue.

“The goal of better sound included granular control”, says Steve Silvertooth, Manager of Broadcast Engineering for the Diamondbacks, who experienced the capabilities of Cohesion firsthand during a Billy Joel and Stevie Nicks concert at Chase Field in December 2023 and became convinced that it should be the preferred solution for their upcoming project. Ultimately, the Chase Field system integrated the very same CO12 featured in the arrays of that Billy Joel and Stevie Nicks concert they attended.

Clair Global Integration (CGI) installed the system in the span of a few weeks prior to the 2024 baseball season. The main PA, comprised of eighteen CO12 per side adjacent to the centerfield scoreboard, provided coverage for the bulk of the stadium seating. An additional integration of nine CO12 per side underneath and rotated relative to the main clusters provided further coverage of the outfield and side seating.

This alignment, in lieu of more traditional co-located arrays, reduced interference in the lower end of the spectrum and worked well for the physical characteristics and reflective surfaces within Chase Field. The system design accounted for those venue attributes, such as the nine-million-pound retractable steel roof and the large (20’ x 15’) doors that open by the north concourse when weather permits. The bandwidth of the CO12, with coverage down to 35 Hz, eliminated the need for subwoofers, which saved valuable space in an area with limited room for installation.

The system also included an upgrade to the control room reference monitors by integrating a pair of Cohesion CF10 point source loudspeakers. These fill speakers are voiced similarly to the CO12 and therefore extended the full-range response of the outfield arrays into the control room to improve mixing of gameday audio and live performances.

(Photos: Anna Carrington/Arizona Diamondbacks/Cohesion)

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