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The Why and How of 70 Volt Audio Systems
http://erictraining.com/articles/AV/70-volt_cheat_sheet.pdf#:~:text=A%2070-volt%20system%20allows%20you%20to%20daisy%20chain,you%20can%20set%20the%20volume%20of%20each%20speaker.
All About 70-volt Speaker Systems - Belden
https://www.belden.com/blogs/broadcast/all-about-70-volt-speaker-systems/
So the 70-volt distributed speaker systems are mostly confined to low audio-quality applications such as background music or paging. Supermarkets, hotels, hospitals, airports are where you will find 70-volt distributed loudspeaker systems; anywhere you have more than a dozen speakers.
70 Volt Audio: Introduction to the Products and Principles ...
https://www.cepro.com/news/70_volt_audio_introduction_products/
Loudspeakers in 70-Volt Systems. Loudspeakers in 70-volt systems can be dreadful, brilliant, or lots of places in between. Every 70-volt loudspeaker essentially is a low-impedance speaker with a transformer on it; the transformer determines how much power, or how loud, the speaker will be in relation to its neighbors.
The Why and How of 70 Volt Audio Systems
http://erictraining.com/articles/AV/70-volt_cheat_sheet.pdf
1) A 70-volt system allows you to use multiple speakers without worrying about impedance issues, which can overload and damage an 8-ohm amplifier. 2) A 70-volt system allows you to run more speakers off a single amplifier.
WHAT IS 70-Volt? Everything you need to ... - Rockville Audio
https://www.rockvilleaudio.com/blog/what-is-70volt-everything-you-need-to-know-wiring-advantages-and-more/
70 volt systems are the number one choice for any application where you want to install multiple speakers. With 70 volt there are a lot of advantages over 8-ohm systems. One of the main advantages is the simplicity of the wiring as well as how easy it is to match up speakers with the amplifier. For example, with a 180 watt / 70 volt amplifier, you can install speakers that …
Common Questions Regarding 70-Volt Audio - AtlasIED
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.
70 V Sound System Myths - Prosoundtraining
https://www.prosoundtraining.com/2016/06/23/ten-70-v-system-myths/
The 70.7 volt system gets its name from the RMS (think average) voltage of a pure tone (a sine wave) whose peak voltage is 100 V, which is the highest voltage that, by code, can be present on the line. So, feed a sine wave into the system and turn it up until the “70 V” amplifier clips, and you will read 70 Vrms on the line, which is 100 Vpeak.
Demystifying 70 V “Constant Voltage” Systems - Church ...
https://www.churchproduction.com/education/demystifying-70-v-constant-voltage-systems/
The so-called 70-volt system is mis-named; it is more correctly called a constant impedance system and like Paul Johnson says, is sort of an audio equivalent of the power distribution in your home. The standard was first developed and adopted in the late 1940’s by radio broadcast engineers for several reasons, none of which had to do with low-power …
25V, 70V, & 100V Constant Voltage Speaker Systems
https://www.lowellmfg.com/wp-content/uploads/What-is-a-25V-70V-or-100V-Speaker-System.pdf
level is 70.7V, so for all calculations, 70.7V will be used. 70.7V was chosen by the system designers simply to make the calculations easier. Typing 70.7 is cumbersome, so very often 70V is used as an abreviation. Keep in mind though, that 70.7V is the actual voltage value used. 25V, 70V, & 100V Systems:
Basic Speaker Installation - 70 Volt Systems and Applications
https://www.proacousticsusa.com/media/wysiwyg/PDFs/pra-70v-speaker-installation-guide.pdf
Basic Speaker Installation - 70 Volt Systems and Applications. Basic Attenuator/Volume Control Installation. Full Remote Control Attenuation. Zone Remote Control Attenuation. Figure 1. Figure 3. Figure 2. Figure 4. Be careful not to cross wires when installing your speakers. Wiring should always be negative to negative and positive to positive
Need help understanding 70.7 Volt Line Audio | …
https://www.electronicspoint.com/forums/threads/need-help-understanding-70-7-volt-line-audio.292316/
Still trying to understand 70.7V systems: I have an amplifier with output labeled 70.7 V. 50 Watt, 100 ohm. I believe the 100 ohm, is the minimum impedance the amplifier can deliver full 50 Watts power. If this is correct, and: P=5000/Z: 5W=5000/1000, 10W= 5000/500, 25W=5000/200, 50W=5000/100 ohms If I connect different loads totaling 50 Watts;
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