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Whats the voltage in the wall? Whats the Freq?
What is ground hum?
The result of the leakage of AC into the audio circuit.
What are electrical breakers rated in?
Audio cables should be bundled with power cables,
Surge compressors cleans up incoming voltage and regulates it.
Electrons are negatively or positively charged?
What do resistors limit?
What are the three formulas for voltage?
- - E=IR
- - E=P/I
- - E= square root of (P*R)
What are three formulas for Current?
- - I=E/R
- - I=P/E
- - I=Square root of (P/R)
What are three formulas for Resistance?
- - R=E/I
- - R=E(squared)/P
- - R=P/(squared)
What are three formulas for power?
- - P=IE
- - P=E(squared)*R
- - P=I(squared)/R
To cut down electrical hum, all audio needs to be on the same circuit.
What is the formula for total resistance for a parallel circuit?
- 1 1 1
- --- + --- + ---
- R1 R2 R3
What is the definition of impedance?
Total opposition to current in an AC circuit.
Z - Impedance
- Z is measured in Ohms
- X is measured in Ohms
- L is measured in Henries
- C is measured in Farads
Name the resistor color codes.
For GREY, RED, BLUE
- 0 - Black 6- Blue 1- Brown 7- Violet
- 2- Red 8- Gray
- 3- Orange 9- white
- 4- Yellow
- 5- Green 52,000,000
Transformers have two windings called?
Primary and secondary.
Transformers are not used for what?
The AES standard for a 3 pin XLR audio cable?
- Pin 1= Ground
- Pin 2= Hot
- Pin 3= Cold
What is the acronym for electro-magnetic field?
Radio Freqency interferance is ?
Unwanted alterations of the waveform.
If you lift or disconnect the ground will pass signal?
Do Power amps get turned on first or last?
Since left and right is critical, Should walls of a controll room be Parallel?
3 way speaker system refers to what?
the # of speakers and/or frequency range devided into 3 groups.
The wattage or power rating of the amp should be less than the speaker?
False, should always be more.
Power amps at 100 watts through 4 ohms vs 80 watts?
SN Ratio =
signal to noise ratio
Which is larger, dynamic range, or SN?
How can balanced outputing device be interfaced to unbalanced input of another device?
Short cold to ground
The DI box serves what purpose?
The anwer will be all of the above
Whats the difference between active and passive?
- Active needs an outside power source.
- Passive does not require and outside power source.
Which has a hotter output? Professional or consummer grade?
10 K output impedance is an example of high or low?
The reflection of certain freq over others
What has higher destortion specifications, Active or Passive?
What is slew rate?
measurment of amps ability to respond to transients
What is clipping?
amplitude distortion, or peaking.
Identift decibel scale.
- DBV= consumer
- DBU= professional
What would you like to do?
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