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Mansfield ISD installs largest Electro-Voice X2 system in North America
Located in suburban Fort Worth, the Mansfield Independent School District (ISD) facilities include the Dr. Jim Vaszauskas Center for the Performing Arts, a freestanding 142,000 square-foot facility used for live music and theater events. It also functions as a professional development center, with a conference/banquet area, breakout rooms and computer labs, creating a profit center for the school district while serving its students, staff and community.
During the pandemic, the facility began experiencing end-of-life issues with some of the technology installed there, necessitating a full refurbishment. Mansfield ISD engaged Crux Technology & Security Solutions (Fort Worth) to make an in-depth assessment of the situation, then make recommendations on how best to bring the facility back to the desired standards, in line with the district’s needs and vision.
The PA solution Crux recommended was designed around Electro-Voice X2 line-array loudspeakers in combination with Dynacord’s IPX series amplifiers. DSP, time delays, speaker optimization, and system control were programmed into the amplifiers via Dynacord Sonicue Sound System Software. The physical installation was executed by another area company, Electro Acoustics.
The ability to deliver a large system in a timely manner was critical, as the Crux design created the largest permanent installation of EV X-Line Advance in North America, with a total of 67 full-range cabinets plus ten subwoofers for the 5500-seat auditorium’s PA system. In addition, both the left and right sides of the semicircular room can be walled off to create smaller dedicated spaces, each with its own sound system and seating for 640.
The main auditorium PA consists of twin 13-box X2-212 arrays, each with eleven X2-212 90° boxes above two 120° models to ensure full coverage across the front. The low end is amply supplied by a center hang of ten X12-125F dual-15’’ flying subwoofers. To ensure full coverage to the back of the capacious auditorium, three delay arrays of seven X2-212/120 enclosures are evenly spaced to cover the back of the room.
Audio for the two side rooms is provided by independent 10-box line arrays, utilizing the 90° dispersion X2-212 to achieve full coverage in those narrower spaces. These side room hangs were optimized via Sonicue to deliver sufficient low end without requiring additional subwoofers.
The entire PA system is powered by sixteen Dynacord IPX20:4 amplifiers. With 20,000 watts in two RU of space, these Dante-enabled smart amplifiers are part of the Sonicue ecosystem. Sonicue was thus used to implement key system design elements, including loudspeaker optimization, room EQ, time delay and subwoofer directionality. Additionally, IPX amps employ Eco-Rail technology to reduce power consumption by up to 50%, which was a big selling point for the school district.
Another function of IPX’s feature set is Ghost Power, a problem-solving technology that ensures the amplifer and processing will instantaneosly recover from mains power glitches. It eliminates reboot issues that might occur during a short-term outage or a transition to a secondary power source by ensuring the amplifiers have sufficient power in reserve to maintain DSP through generator startup.
With only sixteen amps needed to accommodate 320,000 watts of power, the existing catwalk in the main auditorium could handle the equipment racks without additional structural support. “In upgrading the facility, our flexibility was limited in terms of conduit runs”, explains Ryan Walker, Senior Account Manager at Electro Acoustics. “Fortunately, the catwalk made a pretty good midway point. We have about 300 feet of CAT cable to bring the Dante network up to the amps. From there, we had manageable runs of about 300 to 400 feet of copper out to the various speaker positions.”
Walker also notes that installation of the line arrays was remarkably easy. “We were fortunate that the auditorium had a motorized hoist system in place for the massive self-powered system we were replacing”, he says. “The positive pin-locking system on the EV arrays made it easy to stack the speakers and build the arrays in place.”
The equipment list for this installation comprises forty-two X2-212/90 line-array loudspeakers (90° dispersion), twenty-five X2-212/120 line-array loudspeakers (120° dispersion), ten X12-125F dual 15’’ flying subwoofers, seven X12TE-Grid rigging kits for X2 line arrays, and one X12-125F-Grid rigging kit for flying subwoofers, all from Electro-Voice, plus sixteen IPX20:4 DSP power amplifiers (four channels x 5000 W) and the Sonicue Sound System Software from Dynacord.
(Photos: Bosch)
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