The Chesapeake Energy Arena, Oklahoma City’s premier venue for large events and
entertainment, is primarily known as the home of the NBA’s Oklahoma City
Thunder. The Arena modernized its sound system prior to the Thunder’s 2016-17
season with the first large scale deployment of Fulcrum’s CS121 passive cardioid
subwoofers and the NBA’s first permanent installation of EAW’s Anya adaptive-array
system. Designed by Marsh/PMK’s Jerrold Stevens and installed by Ford AV, the
advanced technology audio solution gives the Oklahoma City Thunder a sound to
match their name.

“The sound system needed excellent intelligibility, fidelity, output and bandwidth to
enhance the overall fan experience and become more competitive with other NBA
arenas,’ Stevens explains.

“Cardioid was a huge factor in the arena design,” Stevens says. “Vertical subwoofer
arrays are ideal for providing smooth coverage to the seating bowl and keeping
sound energy off the floor. However, the large centrally located scoreboard
precluded any loudspeakers directly over centre court. Forced to hang subwoofer
arrays around the scoreboard’s perimeter, I knew cardioid patterns were necessary
to minimize interference between arrays.”

Stevens was familiar with Fulcrum’s passive cardioid line array modules and their
ability to eliminate excessive rear low frequency radiation without requiring
additional drivers, amplifiers or signal processing channels. “When Fulcrum co-
owner Dave Gunness told me about their new line of passive cardioid subwoofers,
the timing couldn’t have been better.”

Stevens’ design includes four vertical arrays of six Fulcrum CS121 21 inch
subcardioid subwoofers above the scoreboard’s four corners to complement the
Anya columns above its four sides. Stevens also deployed two pairs of delayed fill
CS121 subwoofers for low frequency coverage in the upper corners of the arena.

“I’m so glad Fulcrum figured out passive cardioid subwoofers in time for this
amazing project,” exclaims Stevens. “They eliminated the need for an additional
ring of active cardioid cancellation subs above the scoreboard, and helped deliver
system cost and performance benefits that made for one very happy customer.”