Loudspeakers Quiz Questions And Answers
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How much do you know about loudspeakers? Take this loudspeakers quiz now to test your knowledge. The invention of loudspeakers has proved to be very useful in many areas. It has helped us and facilitated so much work for us. The quiz here does not only give you a chance to test your current knowledge about them, but you will surely learn even more when you answer these questions. Let's go for it!
- 1.
5.1 is a system that incorporates:
- A.
6 matrixed channels
- B.
L, C, R, S, with LFE
- C.
4:2:4 Matrix
- D.
Five discrete audio channels
- E.
LF, C, RF, LS, RS, and a subwoofer
Correct Answer
E. LF, C, RF, LS, RS, and a subwooferExplanation
The correct answer is LF, C, RF, LS, RS, and a subwoofer. This answer is correct because it includes all the mentioned channels in the system. The system incorporates 6 matrixed channels - L, C, R, S, with LFE, which means it includes a left front channel, center channel, right front channel, left surround channel, right surround channel, and a subwoofer. Therefore, LF, C, RF, LS, RS, and a subwoofer are the correct channels incorporated in the 5.1 system.Rate this question:
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- 2.
A part of a moving coil driver that fastens the cone to teh basket while allowing it to move is the
- A.
Voice coil
- B.
Pole piece
- C.
Transformer
- D.
Spider
- E.
Former
Correct Answer
D. SpiderExplanation
The spider is a part of a moving coil driver that fastens the cone to the basket while allowing it to move. It is a flexible and supportive structure made of a series of concentric corrugations. The spider helps to center the voice coil in the magnetic gap and provides stability and control to the movement of the cone, allowing it to vibrate and produce sound accurately.Rate this question:
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- 3.
The ease with which the cone of a driver moves is known as the driver's
- A.
Capacitance
- B.
Reluctance
- C.
Induction
- D.
Compliance
- E.
Damping factor
Correct Answer
D. ComplianceExplanation
Compliance refers to the ease with which the cone of a driver moves. It is a measure of the driver's flexibility and responsiveness to the electrical signals it receives. A driver with high compliance will be able to move more easily, resulting in better sound reproduction and accuracy. On the other hand, a driver with low compliance will be less flexible and may not accurately reproduce the sound signals.Rate this question:
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- 4.
You should always place subwoofers
- A.
At waist height
- B.
At head height
- C.
As high as possible
- D.
Behind the listener
- E.
On the floor
Correct Answer
E. On the floorExplanation
Subwoofers should be placed on the floor because they are designed to produce low-frequency sounds that are omnidirectional and non-localizable. Placing them on the floor allows for better bass distribution throughout the room and prevents the sound from being localized in one specific area. Additionally, placing subwoofers on the floor helps to minimize unwanted vibrations and resonances that can occur when they are placed at higher levels.Rate this question:
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- 5.
A measurement is made in the center of two identical loudspeakers, each powered by 100 watts. This measurement is 60 dB SPL. If one of the speakers is turned off, what would be the new measurement?
- A.
70 dBv
- B.
57 dB-SPL
- C.
54 dBu
- D.
66 dB
- E.
30 dB-SPL
Correct Answer
B. 57 dB-SPLExplanation
When two identical loudspeakers are powered by 100 watts each, the total power output is 200 watts. The measurement of 60 dB SPL indicates the sound pressure level produced by this setup. When one of the speakers is turned off, the total power output is reduced to 100 watts. This reduction in power will result in a decrease in the sound pressure level. Therefore, the new measurement would be 57 dB SPL, indicating a lower sound pressure level compared to the original measurement.Rate this question:
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- 6.
The impedance of a loudspeaker varies with it's input
- A.
Sensitivity
- B.
Power
- C.
Frequency
- D.
Connection
- E.
Wire gauge
Correct Answer
C. FrequencyExplanation
The impedance of a loudspeaker varies with frequency. Impedance is the opposition to the flow of alternating current, and it is affected by the characteristics of the loudspeaker. Different frequencies can cause variations in the impedance of the loudspeaker, which can impact the overall performance and sound quality. Therefore, frequency is an important factor to consider when dealing with the impedance of a loudspeaker.Rate this question:
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- 7.
Speaker wire runs that are more than 100 feet and are connected to an 8 ohm load should be
- A.
10 gauge
- B.
14 gauge
- C.
12 gauge
- D.
16 gauge
- E.
24 gauge
Correct Answer
C. 12 gaugeExplanation
Speaker wire runs that are more than 100 feet and are connected to an 8 ohm load should be 12 gauge. This is because longer wire runs result in higher resistance, and using a thicker wire (lower gauge number) helps to minimize this resistance. The 12 gauge wire has a larger cross-sectional area compared to the other options, allowing for better conductivity and reduced voltage drop over longer distances. This ensures that the speakers receive an adequate amount of power and prevents signal loss or degradation.Rate this question:
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- 8.
Which amplifier would be best suited for a driver with a continuous power rating of 100 watts?
- A.
25 watts peak, per channel
- B.
100 watts program, per channel
- C.
10 watts per channel, bridged
- D.
75 watts continuous, per channel
- E.
150 watts continuous, per channel
Correct Answer
E. 150 watts continuous, per channelExplanation
The best-suited amplifier for a driver with a continuous power rating of 100 watts would be an amplifier that can provide at least the same amount of power or more. Among the options given, the amplifier that offers the highest continuous power rating is 150 watts continuous, per channel. This amplifier would be able to handle the power requirements of the driver and provide sufficient power for optimal performance.Rate this question:
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- 9.
Bridging an amplifier increases its
- A.
Damping factor
- B.
Power output
- C.
Input sensitivity
- D.
RMS rating
- E.
None of the above
Correct Answer
B. Power outputExplanation
Bridging an amplifier increases its power output because it allows the amplifier to combine the power from two channels and deliver it to a single speaker. By bridging the amplifier, the power output is effectively doubled, resulting in a higher wattage and increased sound volume. This is a common technique used to maximize the power output of amplifiers in audio systems.Rate this question:
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- 10.
An amplifier's damping factor reduces or eliminates a driver's
- A.
Compliance
- B.
Back-emf
- C.
Thermal failure risks
- D.
Warranty period
- E.
Gap tolerance
Correct Answer
B. Back-emfExplanation
The damping factor of an amplifier refers to its ability to control the movement of a speaker driver. Back-emf, or back electromotive force, is the voltage generated by the speaker driver when it moves. It is important to reduce or eliminate back-emf because it can interfere with the amplifier's performance and cause distortion. By reducing back-emf, the amplifier can better control the movement of the driver and produce cleaner and more accurate sound reproduction.Rate this question:
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- 11.
In a moving coil driver, the voice coil interacts with the __________ to create cone movement
- A.
Spider
- B.
Permanent magnet
- C.
Surround
- D.
Basket
- E.
Phasing plug
Correct Answer
B. Permanent magnetExplanation
In a moving coil driver, the voice coil interacts with the permanent magnet to create cone movement. The permanent magnet provides a constant magnetic field, and when an electric current passes through the voice coil, it creates a magnetic field that interacts with the permanent magnet. This interaction causes the voice coil to move back and forth, which in turn moves the cone of the speaker, producing sound.Rate this question:
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- 12.
The specification: 20hz-20khz +/- 3dB means
- A.
Output of these frequencies will vary by a minimum of +/- 3db
- B.
Output of these frequencies depends on being within 3 dB of maximum output
- C.
There will be no output at all above 20 kHz or below 20 Hz
- D.
Output of these frequencies will vary by a maximum of +/- 3dB
- E.
Frequency response will be flat between 20Hz and 20kHz and vary +/- 3db above and below
Correct Answer
D. Output of these frequencies will vary by a maximum of +/- 3dBExplanation
The correct answer is "output of these frequencies will vary by a maximum of +/- 3dB." This means that the output level of frequencies within the range of 20Hz to 20kHz will not deviate more than +/- 3dB from the reference level. In other words, the sound produced at these frequencies may be slightly louder or softer, but the difference will not exceed 3dB. This specification provides information about the frequency response of a device or system, indicating its ability to accurately reproduce audio within this range.Rate this question:
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- 13.
Quarter space loading results in
- A.
Inpedance mismatches
- B.
+3dB boost in omnidirectional frequencies
- C.
+6dB boost in omnidirectional frequencies
- D.
+3dB boost in all frequencies
- E.
+6dB boost in all frequencies
Correct Answer
C. +6dB boost in omnidirectional frequenciesExplanation
Quarter space loading refers to placing a loudspeaker in a corner of a room, which creates a boundary effect that boosts the low-frequency response. This positioning results in a +6dB boost in omnidirectional frequencies, meaning that the sound produced by the loudspeaker in all directions will be amplified by 6 decibels in the low-frequency range.Rate this question:
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- 14.
A driver with a diameter of twelve inches will be omni-directional until what frequency?
- A.
282 Hz
- B.
482 Hz
- C.
182 Hz
- D.
1082 Hz
- E.
82 Hz
Correct Answer
A. 282 Hz -
- 15.
Low frequency horns
- A.
Help focus low frequencies
- B.
Help disperse low frequencies
- C.
Provide longer throw of low frequencies
- D.
Help focus low frequencies & provide longer throw of low frequencies
- E.
Help focus low frequencies & helps disperse low frequencies
Correct Answer
D. Help focus low frequencies & provide longer throw of low frequenciesExplanation
Low frequency horns are designed to help focus low frequencies and provide a longer throw of these frequencies. This means that they help to concentrate and direct the low frequency sound waves in a specific direction, allowing them to travel further without significant loss in intensity. By focusing the low frequencies, the horns enhance their projection and increase their range, making them more audible over long distances. Therefore, the correct answer is that low frequency horns help focus low frequencies and provide a longer throw of low frequencies.Rate this question:
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- 16.
The mouth of a low frequency horn must be
- A.
Equal to the wavelength of the lowest frequency you want it to reproduce
- B.
1/2 of the wavelength of the lowest frequency you want it to reproduce
- C.
1/4 of the wavelength of the lowest frequency you want it to reproduce
- D.
1/8 of the wavelength of the lowest frequency you want it to reproduce
- E.
1/16 of the wavelenth of the lowest frequency that you want it to reproduce
Correct Answer
C. 1/4 of the wavelength of the lowest frequency you want it to reproduceExplanation
The mouth of a low frequency horn must be 1/4 of the wavelength of the lowest frequency you want it to reproduce. This is because the mouth of the horn acts as an opening through which the sound waves generated by the horn can escape. In order to effectively reproduce low frequencies, the mouth of the horn needs to be a certain size relative to the wavelength of the sound waves. By making the mouth 1/4 of the wavelength, it allows for efficient transmission and reproduction of the low frequency sound waves.Rate this question:
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- 17.
Crossovers are used to
- A.
Protect high frequency drivers
- B.
Improve sound of low frequency drivers
- C.
Protect the amplifier
- D.
Improve the frequency response
- E.
Protect high frequency drivers & improve sound of low frequency drivers
Correct Answer
E. Protect high frequency drivers & improve sound of low frequency driversExplanation
Crossovers are electronic circuits used in audio systems to divide the audio signal into different frequency ranges and send them to the appropriate speakers. They protect high frequency drivers by preventing them from receiving low frequency signals that they cannot handle, which could potentially damage them. Additionally, crossovers improve the sound of low frequency drivers by ensuring that they only receive the frequencies they are designed to reproduce, resulting in a more accurate and balanced audio output.Rate this question:
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- 18.
Bi-amping and Tri-amping are
- A.
Enclosures with multiple drivers
- B.
Enclosures with both drivers and amplifiers
- C.
Crossover settings
- D.
Setups using active crossovers and multiple power amps
- E.
Using both amp channels to drive one speaker
Correct Answer
D. Setups using active crossovers and multiple power ampsExplanation
Bi-amping and Tri-amping are setups using active crossovers and multiple power amps. This means that instead of using a single amplifier to power all the drivers in a speaker enclosure, separate amplifiers are used for each driver. Active crossovers are used to divide the audio signal into different frequency ranges, which are then sent to the corresponding amplifier and driver. This allows for more precise control over each driver's performance and can result in improved sound quality and accuracy.Rate this question:
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- 19.
Slew rate is a measurement of
- A.
An amplifier's transient response
- B.
A driver's transient response
- C.
A crossover's slope
- D.
A cabinet's resonate frequency
- E.
An amplifier's input sensitivity
Correct Answer
A. An amplifier's transient responseExplanation
Slew rate is a measurement of an amplifier's transient response. Transient response refers to how quickly the amplifier can respond to sudden changes in input signals. A higher slew rate indicates that the amplifier can handle rapid changes in input voltage, resulting in better accuracy and fidelity of the amplified signal. Therefore, the correct answer is an amplifier's transient response.Rate this question:
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- 20.
THD means
- A.
Thermal heat detector
- B.
Total heat displacement
- C.
Total harmonic distortion
- D.
Total harmonic displacement
- E.
Thermal harmonic distortion
Correct Answer
C. Total harmonic distortionExplanation
Total Harmonic Distortion (THD) refers to the measurement of the distortion caused by harmonics in an electrical system. Harmonics are additional frequencies that are multiples of the fundamental frequency and can be generated by non-linear loads. THD quantifies the amount of harmonic distortion present in a signal or system by comparing the total power of the harmonics to the power of the fundamental frequency. It is an important parameter in evaluating the quality and efficiency of electrical systems, as excessive harmonic distortion can lead to equipment malfunction, power losses, and interference with other devices.Rate this question:
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- 21.
Piezoelectric drivers are
- A.
Very efficient
- B.
Very inefficient
- C.
Very fragile
- D.
Very efficient & very fragile
- E.
Very inefficient & very fragile
Correct Answer
D. Very efficient & very fragileExplanation
Piezoelectric drivers are known for their high efficiency, which means they can convert a large portion of electrical energy into mechanical energy. This makes them ideal for applications where energy conservation is important. However, they are also very fragile due to their delicate construction and sensitivity to mechanical stress. This makes them susceptible to damage and limits their durability. Therefore, while they are efficient in energy conversion, their fragility poses a risk and requires careful handling and protection.Rate this question:
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- 22.
Back EMF is
- A.
The result of an impedance mismatch
- B.
Current created by voice coil movement in magnetic field
- C.
Used to reinforce low frequencies in ported cabinets
- D.
Worst in high frequencies
- E.
A driver's method of transduction
Correct Answer
B. Current created by voice coil movement in magnetic fieldExplanation
Back EMF refers to the electromotive force that is generated when a current-carrying conductor, such as a voice coil, moves within a magnetic field. In the case of a speaker driver, when the voice coil moves in response to an electrical signal, it generates a magnetic field that opposes the original magnetic field. This opposition creates a back EMF, which is essentially a current that opposes the original current driving the voice coil. This back EMF is important in controlling the movement of the voice coil and ensuring accurate reproduction of audio signals.Rate this question:
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- 23.
Ported boxes are used to
- A.
Improve low frequency response
- B.
Improve driver efficiency
- C.
Allow for improved power handling
- D.
Improve low frequency response & improve driver efficiency
- E.
All of the above
Correct Answer
D. Improve low frequency response & improve driver efficiencyExplanation
Ported boxes are designed to improve the low frequency response of speakers by allowing air to move in and out of the enclosure, which enhances the bass reproduction. Additionally, ported boxes can also improve the efficiency of the drivers by allowing them to move more freely, resulting in better overall performance. Therefore, the correct answer is "improve low frequency response & improve driver efficiency."Rate this question:
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- 24.
A crossover's slope determines
- A.
Whether it is active or passive
- B.
The rate at which it attenuates above or below the crossover point
- C.
Which drivers it should be used with
- D.
The input imedance vs impedance
- E.
The time it takes to respond to incoming signal
Correct Answer
B. The rate at which it attenuates above or below the crossover pointExplanation
The slope of a crossover refers to how quickly it attenuates frequencies above or below the crossover point. A crossover is a circuit that splits an audio signal into different frequency ranges and sends them to different drivers (such as tweeters and woofers) in a speaker system. The slope determines how rapidly the signal is rolled off or reduced in amplitude as it moves away from the crossover point. A steeper slope will result in a more pronounced reduction in signal strength, while a gentler slope will allow more frequencies to pass through. Therefore, the slope of a crossover determines the rate at which it attenuates frequencies above or below the crossover point.Rate this question:
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- 25.
The component parts of a loudspeaker are
- A.
Damper, enclosure, crossover
- B.
Transducer, monopole, crossover
- C.
Transducer, enclosure, speaker cable
- D.
Driver, box, speaker cable
- E.
Driver (transducer), enclosure (cabinet/box), crossover
Correct Answer
E. Driver (transducer), enclosure (cabinet/box), crossoverExplanation
The correct answer is driver (transducer), enclosure (cabinet/box), crossover. These are the essential component parts of a loudspeaker. The driver, also known as the transducer, is responsible for converting electrical signals into sound waves. The enclosure, or cabinet/box, provides a housing for the driver and helps to enhance the sound quality by reducing unwanted vibrations. The crossover is a circuit that separates the audio signal into different frequency ranges and directs them to the appropriate drivers, ensuring a balanced and accurate sound reproduction. Speaker cable is not a component part of a loudspeaker, although it is necessary for connecting the loudspeaker to an audio source.Rate this question:
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- 26.
DIM100 is what?
- A.
A measurement of harmonic distortion
- B.
A measurement of transient distortion
- C.
A measurement of inter-modulation distortion
- D.
A measurement of damping factor
- E.
A measurement of resistance
Correct Answer
C. A measurement of inter-modulation distortionExplanation
DIM100 is a measurement of inter-modulation distortion. Inter-modulation distortion refers to the distortion that occurs when two or more frequencies interact with each other in a non-linear system, resulting in the creation of additional frequencies that are not present in the original signal. DIM100 specifically measures the inter-modulation distortion at a frequency of 100 Hz. This measurement helps to assess the quality and accuracy of audio equipment and systems by quantifying the level of distortion introduced when multiple frequencies are present.Rate this question:
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- 27.
A loudspeaker with a sensitivity spec of : 98dB-SPL 1w @ 1m will be how loud when driven by 250 watts @ 1m?
- A.
122 dB-SPL
- B.
124 dB-SPL
- C.
113 dB-SPL
- D.
115 dB-SPL
- E.
130 dB-SPL
Correct Answer
A. 122 dB-SPLExplanation
The sensitivity spec of a loudspeaker indicates how loud it will be when driven by a certain amount of power at a specific distance. In this case, the sensitivity spec is given as 98dB-SPL 1w @ 1m, which means that the loudspeaker will produce a sound level of 98 decibels sound pressure level (dB-SPL) when driven by 1 watt of power at a distance of 1 meter.
To find out how loud the loudspeaker will be when driven by 250 watts at 1 meter, we need to consider that each 3dB increase in sound level represents a doubling of sound intensity. Therefore, we can calculate the increase in sound level by taking the logarithm base 10 of the power ratio (250 watts divided by 1 watt), which is approximately 24dB.
Adding this increase to the sensitivity spec of 98dB-SPL, we get a total sound level of 122dB-SPL. Therefore, the correct answer is 122 dB-SPL.Rate this question:
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- 28.
Types of loudspeakers used for sound 'reproduction' are
- A.
Telephone speakers
- B.
PA speakers
- C.
Studio monitors
- D.
Car/truck horns
- E.
Guitar/bass cabinets
Correct Answer
C. Studio monitorsExplanation
Studio monitors are a type of loudspeaker specifically designed for accurate and neutral sound reproduction. They are commonly used in recording studios and audio production environments where it is crucial to hear the audio as accurately as possible. Unlike other types of speakers listed, such as telephone speakers or PA speakers, studio monitors are designed to provide a flat frequency response and minimize distortion, allowing sound engineers and producers to make precise adjustments to the audio during the mixing and mastering process. Therefore, studio monitors are the most suitable option for sound reproduction in professional audio settings.Rate this question:
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- 29.
Which power amplifier would be required to operate 4 speakers in a parallel connection if each speaker in the series was rated at 50 watts (continuous) @ 16 ohms?
- A.
200 watts (continuous) @ 16 ohms
- B.
800 watts (continuous) @ 4 ohms
- C.
400 watts (continuous) @ 2 ohms
- D.
650 watts (continuous) @ 8 ohms
- E.
1000 watts (continuous) @ 4 ohms
Correct Answer
E. 1000 watts (continuous) @ 4 ohmsExplanation
To operate 4 speakers in a parallel connection, the power amplifier needs to be able to handle the combined power of all the speakers. Since each speaker is rated at 50 watts, the total power required would be 4 speakers x 50 watts = 200 watts. Among the given options, the only amplifier that can handle this power is 1000 watts (continuous) @ 4 ohms. This amplifier not only meets the power requirement but also has the correct impedance (4 ohms) for the parallel connection.Rate this question:
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- 30.
The main disadvantage of an active crossover system is
- A.
They take a long time to set up
- B.
The lack of user adjustments and controls
- C.
They can be damaged if the engineer is not careful
- D.
They steal amplifier power from the drivers
- E.
Does not sound as good as a passive system
Correct Answer
C. They can be damaged if the engineer is not carefulExplanation
An active crossover system can be damaged if the engineer is not careful. This is because active crossovers require a higher level of technical knowledge and expertise to set up and operate correctly. If the engineer makes mistakes in the configuration or handling of the system, it can lead to damage to the components or overall system failure. Therefore, it is essential for the engineer to exercise caution and precision while working with an active crossover system to prevent any potential damage.Rate this question:
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Aug 26, 2023Quiz Edited by
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Jul 14, 2009Quiz Created by
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