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70v amp, 8-Ohm speakers | AVS Forum
https://www.avsforum.com/threads/70v-amp-8-ohm-speakers.1394557/#:~:text=The%20point%20of%2070-volt%20systems%20is%20that%20you,the%20power%20delivered%20to%20each%20speaker%20remains%20unchanged.
Constant Voltage (70-Volt) Audio Systems For Beginners
https://www.parts-express.com/70-volt-systems-beginners
The transformer in the 70V amplifier is designed such that the voltage from the amplifier is greatly increased in the secondary, usually 70.7 volts at maximum, but the current is greatly reduced. So the power output of the amplifier is the same, just transformed from a lower voltage/higher current to higher voltage/lower current.
Demystifying 70 V “Constant Voltage” Systems - Church ...
https://www.churchproduction.com/education/demystifying-70-v-constant-voltage-systems/
Its basic theory is that the nominal impedance of the speaker line for one watt of power is 5,000 ohms (70.7v squared – sound familiar?). When all of the speakers are connected across the amplifier output up to the total wattage of the amplifier, the load will equal the rated output wattage of the amplifier, sort of.
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 70.7 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.
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.
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