ALLDSP PLP428
2.2.2.3. Fixed IP address
It is also possible to set a fixed IP address and subnet mask for the PLP428. WARNING: If you set a wrong
address (in a different range than your computer), you may not be able to connect anymore. It is strongly
recommended to consult a system administrator before making such settings. It is not possible to set the IP
address via the front panel menu. If you have set a fixed IP address and subnet mask, you must set your
computer to an address within the same subnet. To verify this, you can read out the IP address via the local
LCD display: Press "Menu" 4 times, then press the rotary encoder until the IP address and subnet mask
appear.
2.2.2.4. Firewall
After starting the software application for the first time, your computer may ask you to allow or block the
application access to the network. Please make sure to allow this; if there is a firewall between the application
and the PLP428, the application will not find the PLP428.
2.3. System Setup and Gain Structure
This product offers a wide range of tools for sound system design and setup. These tools can make your
system more efficient and better sounding, but to get the best possible sound it is important to use these tools
properly.
The following section explains how to maximize system gain and how to use the limiters to protect your
amplifiers from clipping. In traditional system design, the output of your console would be routed to a system
EQ, a compressor, and a crossover with output level control. From the crossover, there may be additional
filters that are employed to improve the response of your speakers. There may also be limiters set up to keep
your amplifiers from going into clipping and protect your speakers from the hazards of a clipped signal. Your
amplifiers play a vital role in system setup, because they are last item in the chain before your speakers and
offer the greatest amount of gain (that is their job after all). If your limiters and amplifiers are incorrectly setup
you will not be using your system to its fullest potential and could be harming your speakers.
To ensure an optimal gain structure:
Play a signal at the nominal level from your mixing desk, and set the input gain of your processor to 0.
Set the crossovers that you want to use, while keeping the output gains also at 0.
With DISCONNECTED loudspeakers, turn up the volume of the power amplifiers entirely clockwise (full
volume).
Now reduce the output gain and / or the output limiter setting to get the desired gain, so that the amplifier is
just clipping and the built-in limiters of your processor are just limiting. If the amplifier does not have a built-in
Peak limiter, set your processor's limiter so that the amplifier does not clip.
Now turn down the volume of the power amplifiers, connect your speakers, and slowly increase the volume
while checking the sound.
If all is well, there should be distortion-free sound, and the limiter LEDs are flashing or off, but not
continuously on. If they are continuously on, reduce the output gain of your processor.
If you can not reach enough signal level, increase the processor's input gain or turn up the level from your
mixing desk.
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