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27
Despite their advantages, low-level crossovers are not always
the best choice.
High quality speaker systems that come
equipped
with
a built-in passive, high-level crossover
will
often do an excellent job in small to medium sized meeting
rooms and in small clubs. A passive, high-level crossover also
may
be the best choice for a large, very efficient speaker
system that is not expected to be used at extremely high
HIGH-LEVEL
CROSSOVER
SIGNAL
SOURCE
POWER AMPLIFIER
CONTAINS
ONLY
PASSIVE FILTERS
ELECTRONIC CROSSOVER
SIGNAL
SOURCE
CONTAINS INPUT AND OUTPUT
BUFFER AMPS PLUS FILTERS
ELECTRONIC CROSSOVER
SIGNAL
SOURCE
CONTAINS INPUT AND OUTPUT
BUFFER AMPS PLUS FILTERS
Fig. 22 THREE TYPES OF 3-WAY SPEAKER SYSTEMS
POWER AMPLIFIERS
AMPLIFIERS
power levels. This type of crossover also makes sense if it is
part of an existing speaker system that is doing the job satis-
factorily. Finally, if only one amplifier channel is available to
drive a speaker system, then a passive, high-level crossover is
the only choice (unless one omits the crossover and uses a
wide range speaker instead).
LF
LF
HIGH-LEVEL
CROSSOVER
HF
MF
CONTAINS ONLY
PASSIVE FILTERS
LF
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