# rstt

Home > Preview

The flashcards below were created by user gregjohnson on FreezingBlue Flashcards.

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
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
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
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

### Card Set Information

 Author: gregjohnson ID: 121419 Filename: rstt Updated: 2011-12-07 04:10:45 Tags: rstt notes Folders: Description: rstt review notes Show Answers:

What would you like to do?

Home > Flashcards > Print Preview