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39 Cards in this Set
- Front
- Back
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Signal path |
source - Mic - preamp(mixer) - processor(EQ) - amp - speaker |
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What can affect the sound of a system? |
Humidity elevation distance
but also reverb, the proper equipment selection, positioning, proper eq-ing |
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What is this? |
XLR, balanced, used for audio |
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What are these? |
1/4" tip sleeve mono unbalanced. |
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What are these-hint they are not the same so there are 2 answers |
NL4-amp outputs, speaker inputs NL8-large speaker output The number is how many conductors they have |
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EP4 EP6 EP8 What do the numbers stand for? |
how many pins in the loudspeaker cable EP4-1 or 2 way EP6-3 way EP8-4 way speakers |
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What is this called? What's it do? |
Di-direct input Converts unbalanced to balanced line. Mono. |
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What is this? |
sterio direct one box with 2 channels. |
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Balanced signal? |
Positive, Negative AND ground Can travel long distances Can stop electrical interfearance Louder
Positive (+) and negative (-) Are usually 180° Out of phase from each other Travels long, if you need to run 15 feet or more, you should be using a balanced cable
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Unbalanced signal is?
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2 wires 1-hot aka (signal) 2-Ground
Only short distances Can't block unwanted electric interference
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Types of mics? |
Dynamic Condenser Ribbon |
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Mic pickup patterns? |
Hyper cardioid Bi directional Cartioid shotgun Omni
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Types of eq devices? |
Parametric Graphic |
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Speaker transducer types |
Dynamic, condensor, ribbon, compression, driver/horn, piston |
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Name 2 types of mic transducers? |
dynamic and condensor |
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What does a loudspeaker do |
converts electrical signal to vibrations/soundwaves |
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1/8" Tip sleeve used for? balanced or unbalanced? |
unbalanced mono Consumer video cameras and computers |
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What Is this and describe function |
1/4 inch tip ring sleeve sterio
can be used for single balanced connection or two unbalanced ones |
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Describe name and where used? |
Rca-unbalanced cd players, dvd, consumer standard |
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qualities of an active crossover |
Requires power Cuts out unwanted frequencies before the amp wastes energy boosting them |
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whats the semi professional dbv for line level |
-10dbv |
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whats line level and how is it different from mic level? |
Strong Signal provided by certain electrical equipment stronger than mic |
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Average voltage, amps and watts of an American outlet? |
120v 20amps 2400 watts |
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How to boost mic to line? |
Device like mixer which contains a mic preamp, mic to line adapter
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whats the dbv range for mic level? |
-60 to -40dbv |
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how to calculate for watts? |
WestVirginA W=VxA |
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whats the proffesional dbv for line level |
+4dbv |
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whats RTotal? |
The calculation for speakers in parallel with different impedances 1/ 1/R1 + 1/R2 |
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how do you calculate the total ohms value of speakers in parallel |
impedance of speakers÷#of speakers |
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how much voltage does a level need to have to be line level? |
over 25mV |
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describe qualities of passive crossover? |
doesnt require power usually built into speaker |
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whts is mic level and how is it different from line level? |
voltage level of signal generated by a mic weaker than line level |
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difference between consumer line level and proff line level? |
voltage consumer line isnt usually balanced |
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signal path from source to projector |
source -->output connectors-->input connectors-->proccessing-->output-->input-->projector |
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in female xlr from left to right then down what are the pins? |
positive ground negative |
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if male xlr what are the pins left to right then down |
ground positive negative |
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What's aircraft db? |
140 |
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When do you get ear damage db? |
130 |
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Orchestra db |
90 |
