User manual

19
ENGLISH
RCF Shape Designer works in either of two basic ways:
- AUTOMATIC MODE (default setting): The RCF Shape Designer will select the optimum
enclosure splays, array aiming angle, fly-bar pick point and DSP preset configurations.
- MANUAL MODE: This provides a partial control over the array’s configuration. The enclosure
splays can be increased with a progression of 2° steps for each adjacent speaker, in order to
maintain a spiral array configuration. Then array aiming angle, and fly-bar pick point can be
entered manually by switching on Box1 + grid changeable and MANUAL H flags.
Array window: Manual splays setting
Angles manual changing
Once the design (number of elements and vertical splay angles) has been designed using
Shape Designer software, you can effectively optimise the array depending on the environment
and the application by driving it using different DSP presets stored onboard. Typically arrays
are divided in two or three zones depending the design and size of the array.
To optimise and EQ the array, different strategies are used for high frequencies (long throws
and short throws) and low frequencies.
The longer the distance, the greater the attenuation at high frequencies. Generally, high
frequencies need a correction to compensate for energy lost over distance; the correction
needed is usually proportional to the distance and high-frequency air absorption. In the
near- to mid-field, the air absorption is not nearly as critical; in this zone, high frequencies
need little additional correction.
In the next figure is shown the equalization that corresponds to HF settings for NEAR and
FAR:
MANUAL MODE
HIGH-FREQUENCY
EQUALIZATION STRATEGIES
OPTIMIZING
THE ARRAY