Sign up for ProSoundWeb newsletters
Subscribe today!

Predicting Array Performance: Hanging The PA Right The First Time
Taking the guesswork out of seeing where your sound is going
+- Print Email Share RSS RSS

Back in the good old days predicting the performance of a group of loudspeakers was a hit and miss proposition. We tried to hit all the people and miss the walls. We were happy if we had enough devices to point a transducer everywhere that needed coverage and enough power to make it good and loud.

Complex interactions between devices operating in the same bandwidth, fine level adjustments for individual devices and precise flying angles were the least of our worries. And even if we were worried about such things, we didn’t have the tools to deal with them.

Then came the digital revolution. With the advent of abundant computer horsepower, remote amplifier control and DSP, our capacity to exercise control over sound system parameters took quantum leaps. At the same time, improvements in test equipment allowed manufacturers to give us meaningful data on the performance of the loudspeakers we were driving.

This data combined with the processing power of the modern personal computer made it possible to actually (GASP!) predict the performance of an array before it was hung. Mark IV Audio (read: Electro-Voice, Klark Teknik, Midas and Altec Lansing) was one of the first companies to bring some of these tools to the masses—the AcoustaCADD program was an early example of sound system modeling software.

They also developed a program called Hang Ten to help Electro-Voice MT-4 owners figure out where to attach flying straps to get the boxes to array properly. And anyone who has herked MT-4s around knows that experimenting with different configurations in the real world just wasn’t that much fun.

Later EV produced a program called ArrayShow, which was extremely useful for demonstrating the summing and cancellation between adjacent cabinets hung or stacked in close proximity.

Bose also had its Modeler software. But these products were manufacturer specific, which limited their usefulness.

The next breakthrough came with the introduction of EASE. Although EASE has a distribution agreement with Renkus-Heinz, its loudspeaker database is an unrestricted club. Anyone can join by testing their loudspeakers in a specific manner and submitting the data in the proper form.

With Live Sound, You Can Make Anyone Sound Good

A free subscription to Live Sound International is your key to successful sound management on any scale — from a single microphone to a stadium concert. Written by professionals for professionals, each issue delivers essential information on the latest products specs, technologies, practices and theory.
Whether you’re a house monitor engineer, technical director, system technician, sound company owner, installer or consultant, Live Sound International is the best source to keep you tuned in to the latest pro audio world. Subscribe today…it’s FREE!!

Commenting is not available in this weblog entry.

Audio Central