Paging lesson 5 Flashcards
line matching transformers and associated speakers are connected in _________ across the amplifiers output
parallel
impedance mismatch becomes a problem on _______ if more than one or two speakers are connected
direct connection systems
in any installation care should be taken to keep as much separation between speaker lines and ___________
input lines
___________allow volume control on constant voltage speakers
attenuators
always check _______ for speakers mounted in an area with collision potential
impact rating
________speakers are heavy and sound good in big open areas
pendant
________ and _______ are wired in parallel across the amplifiers output
line matching transformers and speakers
in direct connection systems, wire runs of more than 100 feet should use what size speaker wire
16 AWG or larger
__________ speakers will lose up to 1/2 of their normal volume and will not sound nearly as well
out of phase
in phasing of speakers with 1.5v dry cell + if movment is __________, - if movement is _________
outward
inward
________ mismatching will not sound good but wont cause damage.
upward
8 ohm speaker to 4 ohm amplifier
transformer power loss is usually stated in terms of?
dB insertion loss
in complex installations having large numbers of speakers and/or different types of speakers the use of _________ can simplify power distribution and level adjustment
matching transformer
in a space with variable ambient noise a _______ is more effective than a _______.
ambient noise sensor
attenuators
near orbit speakers offer an extremely wide coverage pattern up to ___________
140 degrees
horn loudspeakers are highly ________
highly directional
runs of 50-100 feet should use _________ AWG wire
18awg
line matching transformers and speakers are wired in ________ across the amplifiers output
parallel
speaker lines can be run as either ______ lines
balanced or unbalanced
______ mismatching should be avoided
downward
4 ohm speaker to 8 ohm amplifier
throat flare is_______
the shape of the horn
out of phase speakers will lose up to _____ of their normal volume and will not sound nearly as well
1/2
high fidelity speakers are usually quite _______
heavy
horns loudspeakers are typically used ________
outdoors
when more than one speaker is used in an area it is important to _____ in order to reduce cancelations
make sure they are in phase
when music will be played relatively loud use a _______ speaker
high fidelity speaker
__________ is the most efficient and cost effetive method for systems that have only one or two speakers
direct connection
transformer loss = _________
they are similar to ______
insertion loss
attenuation
________ becomes a problem on direct connection systems if more than one or two speakers are connected
impedance mismatch
impedance matching
anytime 2 or more speakers are connected to a direct connection output
attenuators allow volume control on _______ speakers
constant voltage
