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WARNING: Do not defeat any safety grounding connection to the ac mains supply to
reduce ground loop noise. This is a dangerous and, in many locales, an illegal practice.
Failure to follow this warning may result in injury or death.
8.3.1 Input Cable
For line level signals, use cable constructed with a shielded, twisted pair. However, the
requirements for portable cables and permanently installed cables are quite different.
These will depend on the specific application, meaning the environments to which the
cable will be exposed: mechanical, chemical (atmospheric), and/or electrical. These
conditions will primarily affect the insulation and the cable construction. For both types
of applications, follow all local electrical codes.
Section 9 Signal Processing
9.1 Digital Signal Processor Compatibility
The processing EAW determines for its loudspeakers is used to modify performance
characteristics that are stable over time and under use. For this reason, precision in the
frequency, amplitude, and phase of the settings are critical for reproducing EAW's settings
and to maintaining those settings over time. The only type of readily available equipment
that can provide these capabilities is a digital signal processor (DSP).
EAW signal processing settings are based on EAW's MX Series digital processors.
Unfortunately, the filter algorithms implemented for digital signal processing vary from
manufacturer to manufacturer. Therefore, if a different manufacturer's digital signal
processor will be used, it is not enough to merely duplicate the MX Series numerical
settings. The transfer functions for the settings must be made similar, meaning not only
the magnitude response but also the phase response. If the transfer functions do not
match closely then this will actually redesign the loudspeaker's performance with
arbitrary results. Contact EAW's ASG Department for assistance about your processor's
compatibility with the EAW factory settings.
9.2 Unpowered Loudspeakers
9.2.1 Single-amplified Mode
Signal processing, whether analog or digital, is required for all single-amplified
loudspeakers to implement the specified high-pass filter (HPF). Digital signal processing is
highly recommended as it can provide not only the required high pass filter, but also
better equalization tools, signal delay, limiting, and accurate gain settings. With most DSP
units, the settings can be protected from unauthorized changes.
Digital Signal Processing:
For certain single-amplified products, DSP is required to achieve the designed
performance. This is stated on their specification sheets. In most cases, this design
approach was chosen to reduce the complexity of the internal passive components,
minimize power losses, and provide far more sophisticated processing to maximize
performance. The information in Section 9.2.2 applies to such loudspeakers.
DSP Output Gains:
EAW's published processor output gain settings are determined so as to achieve the
following conditions. This also applies to gain settings for loudspeakers where the only
processing specified is an HPF (High Pass Filter).
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