USA - San Francisco-based JK Sound provided three large-scale concert sound reinforcement systems - all featuring EAW UX8800 digital processors with Gunness Focusing technology as well as EAW line arrays and concert loudspeakers - for a recent sold-out concert by DJ Tiƫsto at San Francisco's Bill Graham Civic Auditorium, with several other DJ performances held simultaneously in adjacent rooms.

JK Sound, headed by owner Michael Lacina, assembled the three concert systems within a very tight timeframe. The auditorium system included left and right hangs of EAW KF760 Series line arrays flanking the large stage, with additional KF761 modules on the bottom of each array to supply wider dispersion.

A large VIP area at one side of the stage received additional reinforcement from four EAW KF650 three-way loudspeakers on top of dual EAW Avalon DC2 subwoofers. Meanwhile, the systems devised for the two adjacent performance rooms were each headed by a dozen EAW KF750 three-way concert loudspeakers atop another dozen EAW SB750 18-inch-loaded subwoofers.

All three systems also incorporated new EAW UX8800 dual-mode digital processors for both loudspeaker and system processing. The 4-input by 8-output UX8800 is highlighted by the company's Gunness Focusing technology that eliminates the time smear, horn "honk" and low-frequency cone resonances that can plague conventional reinforcement system designs.

A primary concern was the Graham Auditorium's well-known and rather notorious reputation as a reverb generator, making it imperative to keep output focused as tightly as possible on the audience without letting it stray to the room's numerous reflective wall and ceiling surfaces. "Also, we needed for the source to be as true and accurate as possible, and then at least what is propagated by the room reverb is also true and accurate," Lacina adds. "With the UX8800 and EAW KF760 line arrays, we achieved both objectives."

(Jim Evans)


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