NORTHRIDGE,
California — Indiana University’s Assembly Hall, a 17,000-seat indoor arena is
the home to the Indiana Hoosiers—one of the most storied teams in college
basketball. The arena, which opened in 1971, was recently retrofitted with a
new audio system featuring HARMAN’s JBL loudspeakers and Crown amplifiers. Pensacola, Florida-based All Pro Sound in
conjunction with Sweetwater, Inc. of Ft Wayne, IN., handled the installation in
coordination with New York-based Acoustical Design and consulting firm SIA
Acoustics.
“Before
we were called in, Assembly Hall was still using its original sound system from
1971. The arena had a lot of existing acoustical treatment but the sound
quality in the lower frequencies was unbalanced and made it difficult for the
crowd to hear speech announcements clearly. Needless to say, we had to bring
the system up to today’s standards for performance, coverage and intelligibility,”
explained Sam Berkow, Principal at SIA Acoustics.
As
an older facility, Assembly Hall’s unique architecture caused some challenges
in the installation process. The logistical difficulties of mounting the
speakers to cover the arena’s unusual steeply raked seating proved to be
difficult. “Any big arena like this is going to present some acoustical issues,
but Assembly Hall is unique in that most of the seating is on two very steep
sides of the court and go up high, and there are also balconies that are even
higher,” added John Fuqua, Vice President, All Pro Sound.
“Because of the seating layout, we had to fly the speakers
at 80 feet above the floor. We installed a mix of JBL VERTEC®
VT4888DP midsize powered line array elements, PD5322/95 full-range speakers and
ASB6128 subwoofers specifically to provide the best coverage and performance to
all the seating areas,” stated Fuqua.
The PD5322/95 loudspeakers and ASB6128 subs are powered by eight
Crown Macro-Tech i Series MA9000i, six MA5000i and 10 CTs 1200 amplifiers. Five
BSS BLU-160 digital signal processors are also part of the system.
For the main arrays All Pro Sound installed six hangs of
nine VT4888DP line array elements each, spaced around the arena. The 10
PD5322/95 speakers are used for upper balcony fill and are flown from the
existing catwalk system. The ASB6128 subwoofers are hung in four arrays of four
boxes each, placed near the outer main arrays.
“Sam Berkow and the SIA Acoustics design team chose this
combination of HARMAN equipment because the JBL speakers are the right match in
size and coverage capability, especially considering the odd vertical layout of
the seats at the sides, and the electronics complement the speakers perfectly
to achieve the highest level of performance for the venue,” concluded Fuqua.
“For this system, the job was contracted, the equipment
procured and the installation completed in just 19 days from the receipt of the
notice to proceed. We coordinated with HARMAN representatives, All Pro Sound, retailer
Sweetwater and the Indiana University staff to streamline the process and
facilitate this quick turnaround. It was an impressive amount of work to be
completed and be up and running within such a tight schedule,” added Berkow.
“We are extremely happy with the results.”
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