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What is a 70v transformer speaker? - AskingLot.com
https://askinglot.com/what-is-a-70v-transformer-speaker#:~:text=The%2070V%20system%20works%20by%20using%20a%20transformer,are%20placed%20directly%20before%20a%20speaker%27s%20step-down%20transformer.
The Why and How of 70 Volt Audio Systems
http://erictraining.com/articles/AV/70-volt_cheat_sheet.pdf
The Why and How of 70 Volt Audio Systems The basic components of a 70-volt system are (1) an audio source, (2) a 70 volt amplifier, (Never hook up 70 volt speakers to a residential 8 ohm amplifier. Stuff could blow up!) (3) speaker wire (usually 16/2 gauge for runs up to 1,000 feet) and (4) speakers with
70 V Sound System Myths - Professional Audio Training
https://www.prosoundtraining.com/2016/06/23/ten-70-v-system-myths/
The 70 V system is just a means of signal distribution. It has nothing to do with the type of loudspeaker used. While 70 V distribution works well for ceiling loudspeakers, the amplifier doesn’t know or care about “what” or “where” with regard to loudspeakers. Do you have separate circuits in your house for toasters, TVs, and lamps?
Demystifying 70 V “Constant Voltage” Systems - Church ...
https://www.churchproduction.com/education/demystifying-70-v-constant-voltage-systems/
The idea was to raise the amplifier's output voltage (at the amplifier) to a nominal 70V and then reduce the voltage at the loudspeaker to provide a proper level that the driver (s) can handle. This is the exactly the same idea that the power company uses to minimize wire size (wire is expensive, you know).
Wiring a 70-Volt Audio System - YouTube
https://www.youtube.com/watch?v=4rcSd3Ql88Q
Follow these wiring guidelines to ensure you configure your 70V audio system properly. For more information, visit http://bit.ly/2bCnjPl.
Common Questions Regarding 70-Volt Audio
https://www.atlasied.com/blog-constant-voltage-speaker-systems
70-volt systems have lots of phase interference and comb filtering. High density ceiling loudspeakers do indeed exhibit significant phase interference and comb filtering. This is one of the reasons why they can produce even sound coverage. In general, the more loudspeakers, the more interference, the more even the coverage.
Understanding 70v / 100v line Loudspeaker Tappings
https://cie-group.com/how-to-av/videos-and-blogs/tappings
70v or 100v line loudspeakers feature a line transformer which steps up the audio outout sugnal 100 volts (or 70 volts!) so that the transmission line current for the chosen power output is relatively low. This reduces signal loss and allows lower grade / …
25V, 70V, & 100V Constant Voltage Speaker Systems
https://www.lowellmfg.com/wp-content/uploads/What-is-a-25V-70V-or-100V-Speaker-System.pdf
when it is at full output. Normally a 70V amplifier is turned down some so the output voltage is less than 70V. The maximum output voltage of a normal 8Ω amplifier is different depending on the power rating of the amplifier. All 70V amplifiers, however, have a 70.7V maximum voltage
What Tap Setting Should I use on my 70V Speakers?
https://avdesignguide.com/70v-tap-settings/
Select the correct tap setting for 25V, 70V or 100V speakers, based on the wattage required to produce the desired sound pressure level for your application allowing for some additional power headroom. Sum all of these power taps and ensure the amplifier’s wattage rating is not exceeded; otherwise increase the size of the power amplifier to match or exceed your sum.
Understanding the Basics of Distributed Audio Systems | …
https://www.bhphotovideo.com/explora/pro-audio/tips-and-solutions/understanding-the-basics-of-distributed-audio-systems
Other names are used to refer to these systems as well, including “70-Volt Systems” and “Constant Power Systems.”. What truly differentiates a distributed audio system from a standard PA system is that transformers are built into the speakers and special amplifiers are used to power the speakers properly.
Understanding 100V Line Distributed ... - Redback Audio
https://www.redbackaudio.com.au/understanding-100v-line-distributed-speaker-systems/
These systems often called “100V line” or less common in Australia “70V line” are found in most large buildings including shopping centres, schools, offices etc. These audio systems are typically used for general announcing, public address, background music and vitally important fire/evacuation messaging.
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