Preface - Phonic PCR2213 PLUS Manual Del Usuario

1.0 PREFACE

In most of the professional audio applications, multiple speakers
are employed for covering the whole audience area as well as
frequency band. When sound waves are generated with multiple
speakers, proper arrangement is a standard and recommended
practice by audio design engineers and installation technicians.
Phonic provides this active crossover as part of the speaker sys-
tem, which work together with speaker drivers, highs or lows, and
amplifiers, big or small. This crossover will be successful if you
carefully design and align the whole speaker system according to
the following explanation and recommended practice.
1.1 MULTIPLE-WAY SPEAKER SYSTEMS
Full bandwidth covering 20Hz to 20KHz as human audible band,
no single speaker driver can cover this range with wave length
differ by 1000 times with good quality and sufficient sound pressure
level. To deal with this limit, audio engineers need to use multiple
speaker drivers for different frequency band, and we call these
designs as multiple-way system. Multiple-way means different
speakers covering different frequency band, and multiple speakers
could be in the same band. For professional applications, 2-way
and 3-way designs are most popular configuration. To build a 2-way
or 3way speaker system, crossover network is needed to divide
the frequency band into high and low (or high, mid, low) section.
Crossover can be passive or active. Passive crossover can be
found in smaller speaker system that is assembled with inductors,
capacitors, and resistors. Amplifier send in the signal to the passive
crossover network and then to the high and low frequency speak-
ers accordingly. Active crossover did this differently, it is positioned
before the power amplifiers. Then, the power amplifier send the
signal directly to the high or low frequency speakers directly without
the passive crossover inserted. The benefit are:

More solid bass for lower resistance between speaker and
amplifier that maintain effective damping factor.

Lower inter-modulation distortion (IMD).

Save the insertion loss, normally in the range of 1 to 3 dB.
That means save the lost from 20% to 50%.

Increase power efficiency for less composite signal that
will demand lower voltage swing of power amplifiers, and
still provide the same sound pressure level.

Save the high frequency drivers from damage by large
low frequency signal clipping the power amplifiers
which generate high level harmonic signal. This is the
phenomenon that underpower amplifier will burn tweeter
when clipping.
If the user doesn't follow the exact procedure to set-up the speaker
system with active crossover, the result is always very bad and
worst than passive crossover speakers. Because the passive
crossover was already properly adjusted by the designer and
maker.
OK, let's see how we can get the best of the system performance
with Phonic PCR2213 Plus.
PCR2213
All manuals and user guides at all-guides.com
1.2 PCR2213 Plus THE ULTIMATE
CROSSOVER FOR ADVANCED
SPEAKER SYSTEM
The PCR2213 Plus is a very high quality active crossover. It is
designed with 2, 3 or more way speaker systems in
mind with 1, 2 or more PCR2213 Plus to achieve it. The PCR2213
Plus may be used with large sound systems in
auditoriums, theaters, pubs, amusement parks, or touring concerts.
Also for high quality bi-amp stage monitors,
or adding a mono sub-woofer for studio monitors in a control
room.
The Phonic PCR2213 Plus is a high precision tool with a lot of
advanced features:

Stereo 2-way or mono 3-way operation.

Reasonable ways speaker system with multiple PCR2213
Plus.

Industrial standard state
Linkwitz-Riley filters with zero phase error at crossover
frequencies.

Perfect flat summed amplitude response at all Crossover
frequencies.

Independent limiters on all outputs with pre-defined time
parameters.

Latching mute push buttons on all outputs. It is a vital
function during setting up and troubleshooting.

LED indication on all important switching functions for
easy status identification.

Crossover frequencies continuously variable from 80 -
8000 Hz

Time/phase alignment via polarity switches and 4 msec
time delay controls

Switchable horn EQ curve to compensate the HF roll-off.

RF and Subsonic input filters.

High precision components and potentiometers ensure
excellent quality and accuracy of settings

Servo-balanced XLR inputs and outputs
variable 24 dB/octave
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