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Hilton Phoenix Chandler Hotel, Chandler, Ariz.

Nov 24, 2009 12:00 PM

Getting in After Construction


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The Sound Image design called for strategically deploying 125 Martin Audio C8.1T, 6.8T, and C4.8T ceiling loudspeakers throughout the facility; a Crestron TPMC-8X wireless touchpanel and TPS-4LW and TPS-6L wall-mount touchpanels; Crown Audio CTS 600, 1200, and 2000 power amps; BSS London Blu processing; and Draper projection screens.

The Sound Image design called for strategically deploying 125 Martin Audio C8.1T, 6.8T, and C4.8T ceiling loudspeakers throughout the facility; a Crestron TPMC-8X wireless touchpanel and TPS-4LW and TPS-6L wall-mount touchpanels; Crown Audio CTS 600, 1200, and 2000 power amps; BSS London Blu processing; and Draper projection screens.

Complicating the issue was the AV team's late start. "If the project had been put together before ground was broken, I'm sure it would have gone a lot more smoothly," Johnson says.

Johnson led the team as sales liaison and design engineer working with Tim Smith on the original design team and Benjamin Davis as the original installer in the field.

The ceiling audio system flows through the hotel with ceiling loudspeakers in the restaurant with an attached bar that transitions fluidly into the lobby. "There is distributed audio in the porte-cochere, a vestibule which people walk through into the lobby, the restrooms off the lobby, an elevator lobby, a Starbucks location, and a corridor that leads to a pre-function area just outside the ballroom," he says.

"The ballroom is a square room that divides into three sections: a half and two quarters. Because it has to divide and combine, the speakers were placed strategically in those three sections. When the ballroom is fully open, and depending where the chairs might get placed for an audience, we added a fourth speaker zone that fills in the gaps in the original speaker coverage."

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As part of 21 technical zones in the Sound Image design, the team also had to accommodate an exercise room, a large meeting room, a smaller boardroom, a pool bar, and the pool with high-quality audio and control. Each of those zones is addressed with its own amplifier channel so the team can shade the volume or EQ those spaces separately, or apply different processing to them.

Different spaces in the hotel provided different challenges, such as the lobby, which is dominated by hard surfaces including Travertine tile, granite countertops at the reception desk, a stone wall behind the desk, glass windows, and a 16 ft. ceiling. For that reason, Johnson chose to use the larger 8.1T loudspeakers. He placed six over the bar and 11 in the restaurant.

Johnson and the crew determined the loudspeakers' positioning from a floor plan, focusing on areas where the public was likely to gather. "In addition, I opened up a space over the reception desk with the intent that when someone walked up to the desk, they wouldn't have to fight to hear the person they were talking to," he says.

"And the bar that has six speakers over it, and it is designed to flow right into the lobby. So we created a separate zone over the bar so the bartender could have independent volume control of that particular space so as it gets louder in the bar, he or she can adjust the volume accordingly and it doesn't affect the people in the lobby."

The ceiling loudspeakers in the meeting room also act as a reinforcement system with active mic inputs in the room to support a maximum of two microphones. There's an auto mixer and DSP that manages those microphone inputs with line inputs to plug in laptops, iPods, or a DVD player.

A Crestron system controls the audio, and there are drop-down electric screens in the ballroom and meeting room. There are four touchpanels in the ballroom, one for each quarter and one at each bar (front bar and pool bar) and one each in the manager's office, the meeting room, the boardroom, the fitness room, and the closet where a staff member can access the pre-function.

The installation took three weeks for the wiring and two and a half weeks of actual installation. "For us, the challenge was dealing with an existing structure and clearly delineated areas of responsibility for each trade with not a lot of communication between each of us," Johnson says. "We were basically operating autonomously from every other contractor. Ultimately, the system is up and functional and working, so we were able to overcome the communications issues and get the job done, regardless.

"A personal disappointment under the heading 'Best Laid Plans' would be the placement of the speakers because the ceilings of the spaces we were putting speakers into were so densely populated with other systems such as HVAC, fire alarm, and control, etc.," he says.

"But we knew we would have a lot of forgiveness if we had to move these speakers because the Martins have 180-degree and 90-degree coverage patterns. I was free to move them around in the field, within several feet in some cases. And we did very little in terms of output EQ because the speakers don't really need it."



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