W Audio PSR-15A User Manual - page 5

page 5

Operation Manual

Powered Speaker System

The Cabinet

The PSR-15A 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 hasbuilt-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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