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A 70 volt Sound PA Public Address ( PA System ) is comprised of Power Amp or Amplifier / Mixer, speakers (with in line transformers), volume controls or attenuators, and a telephone system interface, depending on your phone company set up. GIN Caries a full line of strait 70v Amps or Amplifiers/Mixer with features such as volume controls, bass and treble controls, etc., that are built into the unit to make it a one stop solution. Most of these have speaker outputs for 4/8/16 ohms, 25 & 70 volt. Drop Ceiling and Ceiling Tile Speakers are great for these Music/Voice Audio Sound Systems, as well as Horns and loudspeakers, which are great for an outdoor PA Public Address Paging System. Regular ceiling and wall speakers do not give you the targeted directional sound that is needed to carry audio long distance outdoors. Hence, we incorporate horns into our Commercial Distributed Audio Sound System and one can make announcements to the public in a loud outdoor setting.
In these systems, the speakers or horns must have in line transformers mounted on them to be used. We carry a full line of Horns and loudspeakers that already have a transformer mounted to them. Conversely, you can also buy in line transformers and connect them to regular 8 ohm speakers or Horns. The transformers that are used are step-down transformers that convert the high-voltage/low-current coming from the power amplifier/mixer to the low-voltage/high-current signal that makes the commercial loudspeaker work. Each transformer usually has multiple wattage taps so that each loudspeaker can be individually set as to how much wattage will enter, because of this, how loud each one will be.
With a set up as such, one does not have to worry about keeping the impedance matched throughout their music system as they would on an 8 ohm based system. Impedance is a measure of resistance and in a 8 ohm system if you hook up too many speakers to one amp the impedance will change to dangerous levels and potentially destroy the amplifier. However, with transformers, you can wire the system in parallel because they regulate the wattage going into each of the speakers. To calculate the wattage of the amp needed to run your system, simply take the total wattage of all the taps and include a 20% buffer, just to be safe. Moreover, all the taps do not need to be set at the same wattage output, hence, you can thereby set the volume for different speakers when the amp is at one constant volume. Thus, you can distribute Music or Voice Audio over a wide area and to multiple locations with a single, or maybe a couple amps. . .
Purchase
at the GIN Electronics Custom Install Store
