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How To Design A Basic Commercial Sound System
http://erictraining.com/articles/AV/how_to_design%2070%20volt.pdf
How To Design A Basic Commercial Sound System Commercial Sound System Basics Commercial sound systems are also referred to as 70-Volt Distributed Sound Systems. In a 70-Volt Distributed Sound System, a transformer is included with each speaker. This changes the system from low impedance (4 or 8 ohm) to high impedance and allows con-
Constant Voltage (70-Volt) Audio Systems For Beginners
https://www.parts-express.com/70-volt-systems-beginners
We can design and analyze a 70V audio system from the aspect of impedance (in ohms, for the experts), but using power (in watts, for the rest of us) to arrive at the same end result is definitely more straight forward. The wattage of any 70V power amplifier is always given by the manufacturer. Most are from 20W up to about 100W.
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.
All About 70-volt Speaker Systems - Belden
https://www.belden.com/blogs/broadcast/all-about-70-volt-speaker-systems/
First, you need to buy an amplifier that has a 70-volt output. These are commercial-grade products so you won't find one at a hi-fi or home theater store. The second thing is that you will need to buy a special transformer for every speaker running off this system. The picture below was provided by Parts Express.
The Why and How of 70 Volt Audio Systems
http://erictraining.com/articles/AV/70-volt_cheat_sheet.pdf
2) A 70-volt system allows you to run more speakers off a single amplifier. 3) A 70-volt system plays in mono, not stereo, so speaker placement is not as critical. 4) A 70-volt system allows you to daisy chain speakers together, running the wire from one speaker to the next as opposed to home runs back to the amplifier for each 8-ohm speaker.
What is a 70v sound system? – TIC
https://ticcorp.com/blogs/default-blog/what-is-a-70v-sound-system-preview-5c104335c7ee3
Posted by Henry Yeung on August 20, 2018. 70v system is a constant voltage distributed sound system, often used in commercial settings due to the ease of installation and design. Under the traditional loudspeaker system design, impedance load has to match the operable range of the amplifier. Since most loudspeakers are 8Ω and amplifiers can handle 4 …
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