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Princess Yachts |
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Princess YachtsOur design brief was to provide Princess Yacht's four sites in and around Plymouth with new PA systems. The main site at Newport Street in Plymouth comprises of a number of manufacturing buildings known on site as 'Units'. Most units originally had their own independent PA system for broadcasting background music and also the broadcast of announcements and shift time signals derived from a central amplifier. Over the years many problems occurred with this set up. Because the amplifiers were accessible to all members of staff the radios kept being re-tuned or the level was turned up too high or down too low, sometimes the amplifiers were even found to be switched off. To overcome this Princess Yacht's IT manager specified that the control of any new system was to be strictly limited to the unit supervisors only and that all adjustments should be made from the supervisors PC's. Our solution was to design a new system with all the control equipment and amplifiers centrally located in the IT Server Room. To provide control via Princess Yachts IT network we chose to base the new PA system around QSC Audio's DSP322ua digital signal processor. The DSP322ua can be connected to an Ethernet network to allow real time control from any PC on the same network. The diagram below shows the network set up.
This indicates that a networked PC on one site could control the PA systems on any of the sites. This is indeed the case for the system administrator, but access for a unit supervisor needs to be limited to controls that have an effect in their own area only. The QSControl software allows bespoke user control panels to be created. A total of twenty six such user panels were produced, one for each unit supervisor. Each panel requiring a username and password to be entered to gain access, therefore, each area supervisor has access to his area controls only. An example of a user screen is shown below, this one is for Unit 10's supervisor.
It can be seen that the user only has control over the background music, being able to select a radio station and to adjust the level of the background music only. Four additional panels were created, one per site, to allow maintenance engineers to access all system controls. Again access to these panels is restricted requiring entry of a username and password. The Newport Street engineering panel is shown below:
The amplification for all of the sites, with the exception of Coypool, is provided by QSC Audio CX404 amplifiers which feed the loudspeaker load through Accent 100V line transformers. The decision to use the CX amplifiers was purely one of packaging, four 400W amplifiers in a 2U high unit (4U including transformers), rather than our normal choice of QSC's ISA range which provide two channels in a 3U package. This provided a saving of 8U in the required rack height. At Coypool the original amplifiers were retained, but have been adapted to allow the system to provide control of their output level only.
For more information on our DSP solutions see our DSP Systems pages
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Featured Projects |
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St. Paul's Church
No... not the Cathedral but St. Paul's Church in Irton, who now have a new PA system. |
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