Owner`s manual

Page 12 of 28 RD0169 (A) CAF730 & SS730 OWNER’S MANUAL
5.7.3 Selecting an Appropriate Amplifier Size Rule Of Thumb
If a CAF730 Line Array is used for professionally opera
ted concert applications, a rule of thumb can
be applied. Where the full output capabilities of the loudspeakers may be needed to achieve
appropriate acoustic output levels, woodworxmax recommends
amplifiers with power ratings up to twice
the wattages listed in the above charts. This provides a peak voltage capability of 6 dB above the
specified rms voltage limit. This assumes the audio signals will have a peak to average ratio in
excess of 6 dB, which is usually, but not always, true. Under this condition, the thermal limits are
unlikely to be exceeded. While this rule of thumb is consistent with the woodworxmax testing parameters,
it does NOT guarantee trouble-free operation. That is discussed under “Operating Limits.”
WARNING: The power amplifier sizes recommended by the above rule of thumb are capable of
continuous output levels that can cause damage to or failure of the transducers. Exercise caution
in operation to avoid exceeding the specified maximum rms voltage limits.
In some cases, applying this rule of thumb to the power ratings listed in Section 5.7.1, would
indicate impractical amplifier sizes, such as 11,200 W for the LF section of eight CAF730s. In such
cases, multiple amplifier channels each powering fewer CAF730s would be more practical.
5.7.4 Operating Limits
It is the responsibility of the audio system operator to operate the loudspeakers within their
capabilities. This is the only way to ensure that loudspeakers are not stressed beyond their limits
to the point of damage or failure.
Operation beyond their capabilities usually includes, but is not limited to, one or more of the
following conditions:
Amplifier clipping
Voltage input in excess of the specified rms voltage limit
Peak voltage input in excess of twice the specified voltage limit
Noticeable distortion
Mechanical noise (such as cones bottoming out)
A suitable means for determining these conditions is highly recommended. At a minimum, the
operator should have a meter display calibrated to indicate when the maximum rms voltage limits
will be exceeded. This assumes amplifiers are not being driven into clipping at those limits.
5.8 INPUT CONNECTIONS
5.8.1 CAF730 Input Connections
There are two Neutrik NL4MP connectors on the rear of each CAF730. The connectors mate with
Neutrik NL4FC in-line cable connectors.
CAF730 INPUT NL4 (each of two)
PIN 1- LF-
PIN 1+ LF+
PIN 2- MF/HF-
PIN 2+ MF/HF+
1. Use as the input to the CAF730
2. Use the second connector to loop the LF and MF/HF signals to the next CAF730.