Use the internet to find the answers to the following questions.

Q.1) 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


Q.2)  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


Q.3)  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


Q.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


Q.5)  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


Q.6)  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


Q.7)  A part of a moving coil driver that fastens the cone to the basket while allowing it to move is the
A. voice coil
B. pole piece
C. transformer
D. spider
E. former


Q.8)  The impedance of a loudspeaker varies with it’s input
A. sensitivity
B. power
C. frequency
D. connection
E. wire gauge


Q.9)  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


Q.10)  Bridging an amplifier increases its
A. damping factor
B. power output
C. input sensitivity
D. RMS rating
E. none of the above


Q.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


Q.12)  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


Q.13)  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


Q.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


Q.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


Q.16)  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


Q.17)  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


Q.18)  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


Q.19)  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


Q.20)  THD means
A. thermal heat detector
B. total heat displacement
C. total harmonic distortion
D. total harmonic displacement
E. thermal harmonic distortion


Q.21)  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


Q.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


Q.23)  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


Q.24)  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


Q.25)  Piezoelectric drivers are
A. very efficient
B. very inefficient
C. very fragile
D. very efficient & very fragile
E. very inefficient & very fragile


Q.26)  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


Q.27)  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


Q.28)  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


Q.29)  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


Q.30)  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