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One Systems Natatorium Loudspeakers Installed in Williams College

The Carl R. Samuelson and Robert B. Muir pool, part of the Chandler Athletic Centre at Williams College recently upgraded their sound reinforcement system with One Systems Direct Weather loudspeakers.

The college, located in Williamstown, Massachusetts, built the natatorium in 1988 and since then has hosted several New England and NCAA Division III Championship meets in the facility.

Unfortunately, the effects of time, moisture, and chlorine related byproducts have taken their toll on the original sound system. Recently the school administrators tapped Berkshire Professional Audio to design a new sound reinforcement system. Sonix Pro Audio provided systems integration for the project.

“The big issue was intelligibility,” explained Richard Jansen, owner of Berkshire Pro Audio. “It’s a large, narrow, cavernous space that needed a system which would keep reflections off the walls to minimise reverberation.”

The facility features a 50-metre Olympic-sized swimming pool with two removable bulk heads that allow for a warm-up area, competition pool, and separate diving well. The Bob Muir Gallery offers seating for 400 fans.

Jansen specified two One Systems 112/NAT loudspeakers to cover the pool area – one to provide focus to the diving area with the other covering the longer portion of the pool. A pair of One Systems 108/NAT loudspeakers, splayed from a centre array, covers the entire gallery seating area.

“The speakers in the gallery have a different control system then those covering the pool area,” said Richard. “This allows the school to tailor the levels individually, while a ducking system cuts music when announcements are played.”

Both the 112/NAT and 108/NAT are designed for indoor pool environments and feature sealed enclosure designs. This acoustic configuration allows for simple low frequency equalisation using mixer strip EQ or other shelving style filters.

What is especially notable is that One Systems NAT speakers are made using highly specialised AL6XN stainless steel in its grilles, screws, and U-Brackets.  This makes the speakers significantly more resistant to the effects of chloramides.

Sodium chlorides and potassium chlorides rise above splash zones of indoor pools and aggressively attack 304-grade and marine-grade stainless steels that are used in outdoor speakers. The use of AL6XN stainless ensures that NAT speakers are more protected against Stress Corrosion Cracking, often found in indoor pools using typical stainless steel.

The 108/NAT and 112/NAT Series loudspeakers also offer fully rotatable and interchangeable high-frequency horns. The 108/NAT model is factory supplied with the ETS-60/40 horn which provides a 60º x 40º pattern.

The ETS-105/60 horn, with a 105º x 60º coverage pattern, is included in the carton.  The 112/Nat model includes the ET-60/40 horn and offers the ET-105/60 horn at no extra cost as an available option from the factory.

The 112/NAT features a 12-inch subwoofer and a large format high frequency driver with peak power handling of 3.2kW. The 108/NAT is loaded with an 8-inch LF subwoofer and a medium format compression driver with peak power handling of 800 watts. Both loudspeakers are only available in an 8-ohm configuration.

“The school was extremely pleased with the end result,” concluded Richard. “The two systems provide seamless coverage, but provide the flexibility of two different systems. Whether you are an athlete or a fan – there isn’t a bad seat in the house – even if you have water in your ears.”





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