PCX4000
6
English
Rear Panel
22. High Output Connectors
This connector will output the high-band signal.
23. High-Mid Output Connectors
This connector will output the high-mid-band signal.
24. Mode Buttons
These buttons determines the operating of the crossover. For
4-way mono operation, the right button alone should be pushed
in. Check the diagrams found with the button for other operation
modes.
Note:
Be sure to turn your system off before changing the setting of this
button as it produces interference that may have a negative effect on
speakers or other equipment.
25. Low-Mid Output Connectors
This connector will output the low-mid-band signal.
26. Low Output Connectors
This connector will output the low-band signal.
27. Crossover Frequency Button
Pushing this button will raise the control range of frequencies
adjustable on the low/low-mid band by 10 times (ie. when the
button is released, the control range will be between 44 and 930
Hz; pushed-in, the range will be between 440 Hz and 9.3 kHz).
28. Input Connector
Users can connect their balanced or unbalanced input signals
here.
APPLICATION
Measurement & Setup Tools
By using a hand-held spectrum analyzing tool along with pink
noise, users are able to better perfect their system’s sound. Check
the operation manuals for your analyzer and pink-noise generator
for many more useful tips on set up. Play the pink noise through
your system and stand about 5 meters from your speaker to take
measurements with the spectrum analyzer.
Setting Input Levels
The input level can be cut and boost by up to 6 dB. Provided
the output level of your mixer is set to an acceptable degree,
setting all input controls to 0 dB should be perfectly acceptable.
In the event that the device you connect to the PCX4000’s input
is a consumer level device (ie. signal level is as low as -10dBV),
using the full amount of boost that the input level control allows
may be necessary.
Setting Output Levels
Output levels of each individual band can be cut and boost by up
to 6 dB. With the help of an analyzer, all output levels can be set
to achieve a linear frequency response in the system. First mute
each output, leaving the one you wish to set active, and check
crossover frequencies and levels by playing pink-noise through
your system. Then, when switching on an adjacent band, the level
measured at the crossover frequency should immediately go up by
3 dB. This can then be repeated for all output channels.
Setting the Crossover Frequency
The first thing to keep in mind when setting your crossover is
what frequencies can my speakers handle? Be sure to check your
subwoofer, full-range speaker or driver’s user’s manual before
setting your crossover frequencies. Keeping the signal sent to the
speaker in the frequency range ascribed in the user ’s manual will
ensure your speakers function smoothly and correctly.
The Linkwitz-Riley filter employed by the PCX4000 uses a slope
of 24 dB per octave. It may be interesting to note that, due to
the Crossover Frequency Button on the rear of the device, the
crossover frequency for the low frequency band is adjustable
between 44Hz and 9.3 kHz. This allows for the low output to be
used with full-range speakers as well as subwoofer speakers.
22
23
26
25
2
28
24
