rstt

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Author:
gregjohnson
ID:
121419
Filename:
rstt
Updated:
2011-12-06 23:10:45
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rstt notes
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rstt review notes
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  1. whats the voltage in the wall? what freq
    120;60
  2. what is ground hum?
    the result of the leakage of ac into the audio ciruit
  3. what are elebtrical breakers rated in
    amps
  4. audio cables should be bundled with power cables
    false
  5. surge compressors clean up incoming voltage and regulate it
    false
  6. electrons are negatively or positively charged
    negative
  7. what do resistors limit
    current
  8. what are the 3 formula's for voltage
    • E=IR
    • E=P/I
    • E=square root of (PR)
  9. 3 formula's for current
    • I=E/R
    • I=P/E
    • I=SQ ROOT OF (P/R)
  10. 3 formula's for resistance
    • R=E/I
    • R=E(SQ)/P
    • R=P/I(SQ)
  11. 3 formula's
    • P=IE
    • P=E(SQ)/R
    • P=I(SQ)*R
  12. to cut down electrical hum, all audio needs to be on the same circuit
    false
  13. what's the formula for total resistance for a parallel circuit
    1/1(1/r1+r2+etc...)
  14. what is the definition of impedance
    total opposition to crrent in a AC circuit
  15. what does each letter represent Z,X,L & C
    • Z-impedance-mesured in ohms
    • X-reactance-mesured in ohms
    • L-inductance-mesured in henries
    • C-capacitance-mesured in farads
  16. tranformers have 2 windings called
    primary and secondary
  17. transformers are not used for
    power gain
  18. the aes for 3 pin xlr audio cable
    • 1=ground
    • 2=hot
    • 3=cold
  19. what is the acronym for electromagnetic field
    emf
  20. radio frequecy interferance is
    rfi
  21. define distortion
    unwanted alteration of a waveform
  22. if you lift or disconnect a ground will a signal pass
    yes
  23. power amps get turned on last
    true
  24. since left and right is critical... they should be parallel
    false
  25. 3 way speaker system refers to
    # of speakers and/or frequency range devided into 3 groups
  26. the wattage or power rating of an amp should be less than the speaker
    false
  27. s/n ratio is what
    signal to noise ratio
  28. which is larger dynamic range or s/n
    dynamic range
  29. how can balanced outputting device be interfaced to unbalanced input of another device
    short cold to ground
  30. the DI box serves what purpose
    all the above
  31. what is the difference between active and passive
    active needs power while passive requires no outside power source
  32. which has a hotter output
    professional grade
  33. 10k output impedance is an example of a high or low
    high
  34. diffusion is
    the reflection of certain frequencies over other
  35. what has higher distortion specification active or passive
    passive
  36. what is slew rate
    measurments of amps ability to respond to transient
  37. what is clipping
    peaking, amplitude distortion
  38. identify decible scale
    • dbu-pro
    • dbv-consumer

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