School Public Address Installations
PA System (Public Address System) Designs and Installation
Torrence Sound designs PA systems for a variety of venues with Rauland Telecenter.
At Torrence Sound, we can advise you on:
- Distributed Loudspeaker Design
- IP Paging Systems
- Constant Voltage Systems
- Full range speaker
- Large Scale Loudspeaker Arrays
Even if your venue is a smaller, more intimate setting, Torrence Sound can provide you with the perfect solution for your PA system. School auditoriums, churches, small to medium-sized conference rooms and bars may need something on a smaller scale but we don’t want you to settle for anything less than the quality public address systems our sound professionals can design for you. We are confident we can provide you with the quality PA system you need at a price that fits your budget.
Distributed Sound Systems
Constant Voltage Systems
The most prevalent and cost effective form of distributed loudspeaker design is a constant voltage loudspeakers system. Constant voltage systems rely on a network of audio transformers or autoformers at each loudspeaker and at various stages on the transmission line to manage sound levels and to compensate for varying audio signal voltage across long distances. The audio transmission line is designed around a constant voltage determined by the cable lengths, number of loudspeakers in the sound system, the required sound pressure level of audio program and public address and application and any applicable codes and standards. The constant voltage configuration simplifies the design and management of large distributed loudspeaker systems in that it doesn’t require impedance calculations. Instead the designer will focus on the combined power draw or rating of each loudspeaker transformer assembly, as well as speaker sensitivity and directivity. Transformers designed for use in constant voltage public address systems are usually have multiple taps on the primary side labelled in Watts and secondary side labelled as load. If for instance a 70V. loudspeaker assembly has a transformer with a primary labelled 5W and a secondary labelled 8ohms, the loudspeaker will receive 5W of power when a 70V audio signal is applied to the primary. The sum total of the selected Wattage taps at each speaker assembly should not exceed the capacity of the amplifier. As with all audio systems headroom and capacity to grow should be factored into the design. Constant voltage system designed for public address have the following advantages: They allow systems to overcome loss through long transmission lines easily, they are easily added to and reconfigured.
Distributed PA System Powered Systems
Another form of the distributed loudspeaker design for public address, background and foreground music is the distributed powered loudspeakers system. The audio transmission line usually consists of two unshielded twisted pairs, one for a very low source impedance line level signal and the other pair is a DC voltage for powering a small amplifier mounted on or in the loudspeaker enclosure. Distributed powered systems where popular with phone system service providers installing “plain old telephone service” (pots) because the two pair transmission line is the same cable construction used for the on premises wire (red/green, black/yellow) and the DC voltage for powering the distributed amplifiers could be furnished from spare battery capacity used for the telephone exchanges. The transmission line used by the these systems are specified at (0 dBu, approximately 0.7746 VRMS), the AC voltage required to produce 1 mW of power across a 600 Ω load is a standard in legacy phone systems. Distributed powered systems for public address and background music have many of the same advantages of the traditional constant voltage design and lend themselves well to small office environments. The systems use less central equipment consisting of smaller wall mounted appliances that integrate well to key systems or pbx’s.
IP Paging Systems
An newer alternative to public address is similar to the distributed powered loudspeaker design, but uses IP based media converters and PoE amplifiers at each distributed loudspeaker. An IP speaker system shares the design advantages of the distributed powered system but with a higher level of route-ability because they leverage Ethernet transport infrastructure. The Rauland Telecenter U is IP public address and intercom designed specifically to meet the needs of K-12 schools, the new Telecenter U® system offers a complete network-based system to connect an entire school district in a single unified solution. The system integrates and manages emergency coordination, daily events such as bell scheduling, and everyday needs including morning announcements and classroom to front office communications.
Critical Communications With PA Systems with Rauland Telecenter
The communication needs of school districts are changing dramatically. Planning for safety and preparedness is a critical issue. Telecenter U delivers the technology necessary for schools to communicate emergency information district-wide as needed, and respond quickly. With an advanced system like the Rauland Telecenter U, district-wide notifications and announcements are far easier to deliver. This new system also enables more flexibility in terms of programming and capabilities, live or recorded, for multi-building campuses. Integrated IP-Based Communications
Telecenter U takes advantage of a district’s data network to connect all of the facilities together, allowing communications to flow to and from the right people and places to deliver a seamless, unified solution. The system includes an integrated IP-based internal communications solution for school-based intercom and paging, and interfaces with clock systems, security and access systems, and other public address equipment. Schools today may have many different systems across many different locations. Telecenter U leverages a school’s investment in their existing infrastructure. Raualnd’s Telecenter U delivers a complete, flexible communications solution for districts, campuses and schools in managing emergencies, events and every day:
- Emergencies Telecenter U’s smart response during an emergency helps schools take a proactive approach by allowing pre-recorded messages for different crisis scenarios as well as live announcements. For a lock out, lockdown, evacuation, or weather-related emergency, Telecenter systems enable a school to take action quickly and confidently, with emergency sequences triggered from a phone, web browser or panic button for immediate customized response.
- Event Management Smart schedules using Telecenter U make managing schedules virtually effortless – from ringing bells to synchronizing clocks – from anywhere on the network. Calendars can be easily managed, school by school or centrally.
- Everyday Communications With Telecenter U, live communication is simple and targeted – to a single location, a group of facilities or the entire school district. The fully integrated system covers live paging, intercom, bells, clocks and classroom sound, all day and every day.
Integrated IP-based communications. Telecenter U from Rauland-Borg deliver district-wide critical communications management, from the District to the Campus to the Classroom. Using Telecenter, a school system can integrate and manage communications involving Emergencies, Scheduling and Events, and Everyday use. Telecenter is a complete network-based solution that administrators can access anytime, from anywhere, using a phone or web browser.