W Audio PSR-12A, Руководство пользователя

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page 5 Operation Manual
Powered Speaker System
The Cabinet
The PSR-12A cabinet was designed to be
the strongest moulded composite cabinet
on the planet. This material is rigid enough
to prevent unwanted vibrations in the cab-
inet. It has built-in fly points for hanging,
and a socket in the bottom for mounting on
a tripod stand. Although it is an exceptional
choice for portable sound system use. The
asymmetrical trapezoidal design f the cabi-
net makes it easy to use as a floor wedge
for stage monitor applications.
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The Active Advantage
There are a number of advantages to using
an active speaker system over a passive
loudspeaker:
The internal crossover is active, and its
low power circuitry operates on line-
level signals. It does not waste speaker-
level power like a passive crossover with
large coils, caps, and resistors.
The input signals are crossed over
before they reach the amplifiers, so each
amplifier only receives the correct
frequency range for its driver.
The amplifiers are designed specifically
for these speaker load impedances.
There is no guesswork as to what load
each amplifier has to drive, so they can
provide maximum acoustic output from
the speakers, yet minimize the danger
of speaker damage due to overdriving.
The connecting wires between the
amplifier outputs and the drivers are
kept to a minimum, so the damping
factor of the amplifier is not compro-
mised by the resistance of long speaker
cables. In addition, all the power from
the amplifier is transferred directly to
the drivers with no speaker cable losses
The acoustic sum of the outputs from
the two drivers is optimized electronic-
ally, as well as physically, so the output
response is flatter.
The presence of active circuits within
the speaker cabinet allow the designer
to add on extra details, such as a high
quality mic/line input section and
optional accessory modules.
In short, all the complex interconnect-
ed components in the system are designed
to work in harmony with each other to pro-
duce the best possible sound.
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