PA Systems Flashcards
MPATC
Main Public Address Telecommunications Cabinet
PATC
Public Address Telecommunications Cabinet
Power or Active Speaker
A speaker that has no power, has a built in AMP
Passive Speaker
A speaker that receives power from AMP
XLR
Most common mic input
Rack Unit
U space — 1.75 inches
Zone
Is a single speakers
LAUSD USE SPEAKER SYSTEM “VOLTS”
Use 25 Volts easy to install
What kind of power does a speaker draw
WATTAGE
INDOOR CABLE
22-4 solid cable
OUTDOOR CABLE
18-2 stranded shielded grounded cable “LOUD SPEAK”
ATONOMUS SYSTEM
Small stand alone system used in MPR or field
MIC IN
Accepts lower level audio from mic. Mic only
LINE IN
Accepts higher level audio signals from external sources like “keyboards”
LINE OUT
Used to output audio from device to external speakers amp or recording device
