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Music Prod. > Interconnect Basics > Flashcards

Interconnect Basics Flashcards

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1
Q

What are the four types of audio signals?

A

Microphone Lvl.; Line lvl.; Instrument lvl.; Speaker lvl.

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2
Q

Mic Level Stand

A

Describes the voltage generated by a microphone when it picks up sound, typically just a few thousandths of a volt.

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3
Q

Line Lvl. Signal

A

About one volt, signal traveling from pre-amp to the amplifier.

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4
Q

Instrument lvl. Signal

A

Any lvl. put out by an instrument, commonly from an electric guitar or bass.

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5
Q

What is required to bring an instrument signal up to a line level?>

A

Preamplifier

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6
Q

Speaker lvl. Signal

A

Post amplification signals, much higher in voltage

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7
Q

What do speaker lvl signals require for a safe signal trasner?

A

Speaker Cables

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8
Q

Which Audio signal is the weakest?

A

Mic level

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9
Q

Where is a mic-level input typically on?

A

XLR connector

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10
Q

What are the two types of line levels?

A

consumer and professional

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11
Q

What is a typical line-level?

A

RCA jack; 1/4 inch jack;or 3.5mm phone jack

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12
Q

Impedance

A

The resistance of a circuit to the flow of an electrical current (AC)

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13
Q

Z

A

the abbrev. and symbol used in place of impedance

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14
Q

Lo Z

A

Low Impedance

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15
Q

High Z

A

High Impedance

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16
Q

Hot Lead

A

The wire carrying the desired signal or sound

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17
Q

Cold Lead

A

The wire carrying the desire sound/signal flipped out of phase

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18
Q

Braided Shield

A

Surrounds the hot and cold lead so no electrostatic noise enters the signal

19
Q

Ohm

A

A unit of resistance to the flow of alternating electrical current

20
Q

Output Impedacne

A

measures the source impedance that drives the next unit

21
Q

Input Impedance

A

Measures the load that the unit represents to the driving source

22
Q

When is a D.I. Box used?

A

When a nonstandard unbalanced output needs to interfere w/equipment w/the standard balanced input of the mixer

23
Q

D.I. Box

A

Helps match impedances between different connections

24
Q

Microphone Cables

A

Carry the audio signal to its destination either balanced or unbalanced

25
Q

Unbalanced Line

A

Audio cable carrying an unbalanced signal using two wires: signal and ground

26
Q

How long are Unbalanced Lines typically?

A

no longer than 20-30ft. because of RF interference

27
Q

List some examples of unbalanced lines?

A

Guitar Cables; Keyboard Cables; Pin connectors; “Tip Sleeve Cable”; RCA connectors (DJ’s)

28
Q

RCA Cable

A

unbalanced analog audio connection that sends stereo audio over a right channel

29
Q

TS 1/4”

A

Most commonly used w/electric guitars, which often output to an amplifier

30
Q

Balanced Line

A

Has a ground wire, but also carries two copies of the same incoming audio signal.

31
Q

What is a balanced line often referred to as?

A

A “Hot” and “cold” signal

32
Q

What’s the difference between the hot and cold signal?

A

The two signals are reversed in polarity/phase, so as they travel down the cable, they cancel each other out

33
Q

List Examples of Balanced Lines

A

Microphone Cable; Powered Speaker Cables; Stereo Guitar Cables; “Mixer Out”; “Tip Ring Sleeve”

34
Q

TRS 1/4”

A

(Tip Ring Sleeve) Used to send either mono(balanced) or stereo(unbalance) signals.

35
Q

XLR Connector

A

Designed to keep you from being electrocuted. Sometimes referred to as “earth”

36
Q

What’s the difference between a speaker cable and a guitar cable?

A

1) Speaker cable doesn’t require a braided shield

2) The 2 wires in the speaker cable are usually composed of many thin strands of copper wire and identical

37
Q

What happens when a speaker cable is used for a guitar cable or vice versa?

A

1) Instruments are susceptible to RF interference, etc.

2) The 2 wires in the speaker cable are identical, therefore would cause an impedance problem

38
Q

How to tell the difference between a speaker cable and an instrument cable?

A

Speaker cable- has equalized sized conductors

Instrument Cable- Has a braided shield together and a larger center conductor

39
Q

What is a thicker speaker cabling recommended for?

A
  • Long wire runs
  • Higher Power Amplification
  • Low Impedance Speakers(4-6 ohms)
40
Q

What is a thinner speaker cabling recommended for?

A
  • Short wire runs
  • High-impedance speakers(16-18 ohms)
  • cost effective
41
Q

What are some connector types?

A
  • RCA
  • Dual Banana
  • 1/4”
  • SPEAKON
  • XLR
42
Q

What is a dual banana typically used for?

A

Connecting the amp to the speaker enclosure

43
Q

What are 1/4” typically used for?

A

Instrument or speaker cables

44
Q

What are XLR typically used for?

A

Mic cables and DMX lighting cables

Music Prod. (6 decks)

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