Address System
why is the public address system output set to 70 volts?
In a public address system, the output is set to 70 volts no matter what the power rating is on the amplifier. Why is this done and why is it relevant.
public address systems need to be able to have multiple speakers and extend over a large distance as each situation needs. A higher line voltage means less current for the same power and therefore thinner wires required, and signal drop over distance is less problematic. 70volts was selected because higher voltages are considered potentially fatal to humans and 70 and below considered “safe”. As more line transformers, each driving a speaker, are added to the line the amplifer works harder to maintain the line voltage.
How to set up a PA System Public Address System Live Show
|
|
Toa Electronics A906 Amplifier PA Public Address System $69.56 |
|
|
Solar Powered Address Number Lighting System $21.56 |
|
|
Vintage Kustom PA 10 Professional Model Public Address System $49.95 |
|
|
NICE! 100 Watt Mobile Speaker for a Public Address PA System GOOD CONDITION $0.99 |
|
|
Amplivox S222 Portable Buddy Public Address System $439.95 |
|
|
MEGAPHONE- 25 WATT+siren PA system personal address $34.95 |
|
|
Solar Address System Sundigits 3 Tile BRAND NEW $25.00 |
|
|
J.B. Irwin,Western Electric public address system,N.Y. $8.99 |
|
|
Digital Video Recording Surveillance Systems – Remote Access through IP address $99.00 |
|
|
Webster Model WTA – 150 public address system $125.00 |
|
|
Portable Loud Speaker Amplifier Public Address System BARRETT INTERCOMP No Res $19.99 |
|
|
1948 INSTALLATION & SERVICING OF LOW POWER PUBLIC ADDRESS SYSTEMS $12.00 |
|
|
PAM PORTABLE ADDRESS SYSTEMS BROCHURE 1930 BROCHURE 4 PAGES ARTSY COLOR $5.94 |
|
|
NEW PYLE PLMR20PA MARINE BOAT CAR PUBLIC ADDRESS PA LOUDSPEAKER SPEAKER SYSTEM $103.90 |
|
|
LECTROSONICS LONG RANGER III PUBLIC ADDRESS SYSTEM, PREOWNED, NO RESERVE $218.52 |
|
|
The Metric System of Weights and Measures; An Address D $45.74 |
|
|
Apollo PA-5000 Portable Wireless Public Address System / Amplifier Used $24.95 |
|
|
Fender Passport P-10W Public Address System – 27 W Amplifier – 5″ Speaker - $499.99 |
|
|
VEHICLE PUBLIC ADDRESS SYSTEM $239.95 |
|
|
Fender Passport Systems P10 Public Address System – 27W Amplifier – 1 x 5″ $199.99 |
|
|
Amplivox S222 Portable Buddy Public Address System $439.95 |
|
|
JW Davis Amplifier – Model DA-30 (Public Address System)!!! $85.00 |
|
|
TEACHERS VHF 25W CLASSROOM PUPLIC ADDRESS SYSTEM PA + 3 WIRELESS MICROPHONES $109.95 |
|
|
lecternette model L56B public address system cover latch plastic sound craft new $12.00 |
|
|
Oklahoma Sound Pra-6000 Pro Audio Wired Public Address System – 50w Amplifier - $620.79 |
|
|
Oklahoma Sound Pro Audio Pra-7000 Wireless Public Address System – 100w $711.05 |
|
|
Amplivox S222 Portable Buddy Public Address System $439.95 |
|
|
NEW PYLE PLMR20PA MARINE PUBLIC ADDRESS SYSTEM CONTROLLER $95.35 |
|
|
MEGAPHONE- 25 WATT+siren PA system personal address $34.95 |
|
|
MEGAPHONE- 25 WATT+siren PA system personal address $34.95 |
|
|
Lot of 2 Bogen Model C 10 amp mixer pa system public address amplifer $25.00 |
|
|
Recoton Wireless Portable Public Address System W610 $350.00 |
|
|
HISONIC DUAL 240 WATT PA PUBLIC ADDRESS SYSTEM + STANDS + WIRELESS MICROPHONES $499.95 |
|
|
HISONIC 160 WATT PUBLIC ADDRESS PA SYSTEM + 6 COMBINATION WIRELESS MICROPHONES $199.95 |
|
|
INS IPControl Sapphire EX Appliance IP Address Management System BT Diamond IP $99.00 |
|
|
HISONIC 160 WATT PUBLIC ADDRESS PA SYSTEM + TRIPOD/STAND + WIRELESS MICROPHONES $249.95 |
|
|
Valcom V-1030C Megaphone Public Address (pa) System $87.73 |
|
|
Realistic FM Wireless Public Address System $100.00 |
|
|
Shure Public Address PA System Planning 1962 print Ad $9.99 |
|
|
Velleman Portable Public Address System 7W / 8 Ohm $63.99 |
|
|
PYLE 4 Chanel Marine PWR Amplifier Public Address System PLMR440PA $147.99 |
|
|
1934 Western Electric Public Address System Ad Stadium $9.95 |
|
|
Fender Passport 150 Pro PA System Speaker Mixer Amp NEW Portable Public Address $368.88 |
|
|
Pyle Audio – PWM-A600 Public Address System $147.41 |
|
|
New Marine 4CH Boat Public Address System w/Microphone $89.99 |
|
|
Western Electric public address music systems 1929 ad $9.99 |
|
|
PYLE PLMR20PA MARINE PUBLIC ADDRESS SYSTEM CONTROLLER $84.60 |
|
|
Amplivox Public Address System PA Wireless Microphone $1,049.95 |
|
|
NEW Pyle Plmr20pa Marine Public Address System Controll $72.24 |
|
|
NEW The Taxpayer and the Township System. an Address De $9.52 |
|
|
NEW The American System of Trial by Jury: An Address – $10.81 |
|
|
Speedcall Public Address PA System Horn Relay GE Ericsson MVS Radio 412TR $19.95 |
|
|
PYLE PLMR20PA MARINE PUBLIC ADDRESS SYSTEM CONTROLLER $84.60 |
|
|
NEW Metric System of Weights and Measures an Address De $15.32 |
|
|
NEW Metric System of Weights and Measures an Address De $29.99 |
|
|
NEW Metric System of Weights and Measures an Address De $26.12 |
|
|
NEW Metric System of Weights and Measures an Address De $15.97 |
|
|
SOUND-CRAFT LECTERNETTE PORT PUBLIC ADDRESS SYSTEM $194.95 |
|
|
NEW Metric System of Weights and Measures: An Address D $15.97 |
|
|
HISONIC DUAL 360 WATT PA PUBLIC ADDRESS SYSTEM + STANDS + WIRELESS MICROPHONES $699.95 |
|
|
HISONIC 360 WATT PUBLIC ADDRESS PA SYSTEM + TRIPOD/STAND + WIRELESS MICROPHONES $399.95 |
|
|
HISONIC 240 WATT PUBLIC ADDRESS PA SYSTEM + TRIPOD/STAND + WIRELESS MICROPHONES $299.95 |
|
|
Rena 313-4 Barcode Direct Address Printer Envelope Image Mail System 500W 110V $399.99 |
|
|
Bryce BOS 10K Digital Address Printer Envelope Feeder Mail System FOR PARTS $799.99 |
|
|
1968 Vice President Humphrey Public Address System Repaired Press Photo $28.88 |
|
|
Pyle PMP10 Megaphone Public Address (pa) System $19.30 |
|
|
PYLE PLMR20PA Marine Public Address System Controller $92.99 |
|
|
Amplivox Compact Public Address Portable PA System $639.95 |
|
|
Amplivox Wireless Portable PA Public Address System $529.95 |
|
|
Amplivox Wireless Public Address System Half Mile Haile $369.95 |
|
|
OSP CX6000 Ceiling Speaker PA Public Address System – variable wattage 30w 100v $65.00 |
|
|
1938 Print Ad Silvertone Public Address Systems Battery and Electric Hearing Aid $6.99 |
|
|
New PA500 Voyager Universal Public Address PA System Vehicle Radio Police Fire $79.99 |
|
|
Apollo PA5000 Portable Public Address System With Wired Mike, 117 V or 6 C Cells $169.99 |
|
|
Pyle 4 Ch Marine Boat Amp / PA Public Address System $164.95 |
|
|
ALLEN BRADLEY 1734-ARM SERIES C ADDRESS RESERVE MODULE FOR POINT I/O SYSTEMS NEW $19.75 |
|
|
Half Mile Hailer PA System Public Address $379.95 |
|
|
Wireless PA Public Address System $499.95 |
|
|
Wireless Portable PA Public Address System $524.95 |
|
|
Pyle Marine Boat PA Public Address System Controller $99.95 |
|
|
Boss MR20PA Marine Public Address System Controller $104.99 |
|
|
Boss Audio Marine Plublic Address System Controller $128.57 |
|
|
PylePro PWM-A600 Public Address System 100 W Amplifier – 1 x 6.50″ Speaker $143.74 |
|
|
PylePro PWMA3600 Public Address System 200 W Amplifier- 1 x 8″ Woofer, 1 x 2.50″ $161.24 |
|
|
Peavey 00573540 Messenger M100 Public Address System $278.42 |
|
|
Amplivox Sw720 Public Address System 30 W Amplifier – 1 X 8″ Speaker $861.24 |
|
|
Fender 069-4403-000 Passport Pro 300-Watt Portable Public Address PA System New $509.95 |
|
|
4 CHANNEL MARINE POWER AMPLIFIER/PUBLIC ADDRESS SYSTEM $155.50 |
|
|
Yamaha STAGEPAS 500 Portable Public Address PA Speaker + Mixer System *USED* $769.00 |
|
|
The Metric System of Weights and Measures; An Address D $23.95 |
|
|
Signal Corps Chief & New PA Public Address System photo $4.25 |
|
|
Peavey 00573540 Messenger M100 Public Address System $278.42 |
|
|
Amplivox SW227 Public Address System $1,113.55 |
|
|
Amplivox SW915 Public Address System $2,162.21 |
|
|
Amplivox SW720 Public Address System $1,048.58 |
|
|
PYLE PLMR440PA 4-CHANNEL MARINE POWER AMPLIFIER/PUBLIC ADDRESS SYSTEM $151.88 |
|
|
Peavey 00573540 Messenger M100 Public Address System $278.42 |
|
|
Peavey 00573540 Messenger M100 Public Address System $278.42 |
|
|
Amplivox S222 Public Address System Dj Equipment $393.66 |
|
|
Pyle Plmr20pa Marine Public Address System Controller $76.75 |