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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.
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.
70 Volt Audio: Introduction to the Products and Principles ...
https://www.cepro.com/news/70_volt_audio_introduction_products/
70-volt audio was a runner-up for CE Pro's Top 5 Home Technology Trends for 2019. Not that it's anything new, per se, but the category really heated up in 2018, and all signs point to a thriving future in the residential space — after years of popularity in commercial venues. 70v systems have gained popularity over the years for backyard tunes, but they're making their …
Constant Voltage (70-Volt) Audio Systems For Beginners
https://www.parts-express.com/70-volt-systems-beginners
Constant Voltage (70-Volt) Audio Systems For Beginners High-Impedance Loudspeaker Distribution Audio distribution systems, especially those commonly used in department stores, warehouses, around race tracks, etc., require that many loudspeakers be driven from a single audio amplifier over long runs of speaker wire.
70 Volt Distributed Audio Systems - Terra Speakers
http://terraspeakers.com/70-volt-distributed-audio-systems/
Amplifiers If you’re not already using an amplifier that has 70 volt outputs (like our Crown CDi 1000), you’re going to have to either get one or use a standard low impedance amplifier and purchase and install a transformer at the amplifier’s speaker outputs. These types of transformers have wattage ratings, so be sure you get one that can handle the total wattage …
70 V Sound System Myths - Professional Audio Training
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.
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