70 Volt Audio System Wiring Diagram

Hello i m new at this forum i recently took over a 70 volt installation i have been troubleshooting without any luck a section of speakers that are generating some weird noise almost static noise out of one channel of the amp on all sources the system has three sources a mixer and amplifier out of the amp i have volume controls at 35w and at the speaker taps is set to 10w the amp is.

70 volt audio system wiring diagram. The recommended speaker impedance ratings are usually listed above the speaker wire posts. Speakers that connect with a simple 2 wire installation because the audio power is supplied from the central ized amplifier. Determine the combined output in watts for all speakers on a line. 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.

Depending on the telephone system and amplifier an interface device may not be needed the aim of a paging system is to deliver. Generally speaking 70 volt systems are much more cost efficient than an 8 ohm speaker system when dealing with volume installation of speakers. Often used when wiring pa systems in buildings using hundreds of speakers. 70 volt speaker wiring limitations chart instructions.

70 volt systems are easier to design than 8 ohm speaker systems. So the 70 volt distributed speaker systems are mostly confined to low audio quality applications such as background music or paging. A home stereo for example may often list 6 16 ohms as being ok for use. How to wire a basic 70 volt system on episode 5 of pro acoustics tech talk duration.

Supermarkets hotels hospitals airports are where you will find 70 volt distributed loudspeaker systems. Sporting events sales areas car lots etc. Low power typically 10 watts or less per speaker. Configuration options for 70 volt 8 ohm and hybrid audio systems duration.

An interface devicethat connects the paging system to the telephone system. Some disadvantages of 70 volt systems. Follow the horizontal line nearest the intersection to the left. Often used when wiring outdoor pa systems using all weather horns.

Anywhere you have more than a dozen speakers. Image of the rear of a home stereo receiver amplifier. Also attempting to wire two 8 ohm speakers in parallel to an 8 ohm stereo would have the same effect. Follow the nearest vertical line up to its intersection with a diagonal wire size line.