Amate Electroacústica,s.l.
MA210/MAW215.Version 1.11
Feb 09
3
1.INTRODUCTION
1.1.General
Amate Electroacústica, s.l.
would like to thank you for your confidence in our new
MA
and
MAW Series,
specially designed for Line Array configurations.
The accumulated experience of more than 30 years in the design of acoustic
cabinets and amplifiers, together with the application of the most advanced
technology and transducers, have allowed this series to become the optimal and
ideal solution for a wide range of situations, specially those which require high levels
of sound pressure and a control of vertical coverage. Stadiums, theatres, big events,
etc... will become the perfect places for its use.
We suggest you carefully read the following instructions in order to obtain the best
results in performance.
1.2.What is a line array?
The trend in sound reinforcement has been to increase both the sound pressure level
(SPL) and the size of the audience to be covered. This leads to an increase in the
number of cabinets and, as a result of this, an increase in the total size and weight.
A line array is a group of independent sound sources which are vertically stacked in
order to transform the spherical wavefronts generated by individual sources into a
single flat wavefront.
Fig.1.
Wavefield interference for different wavefronts.
To carry out effectively arraying individual sound sources the system must follow the
acoustic coupling conditions based on the wavelength, the shape of each source, the
surface area of each transducer and the relative source separation.
An assembly of individual sound sources arrayed with regular separation between the
sources on a plane or curved continuous surface is equivalent to a single sound
source having the same dimensions as the total assembly if the following conditions
are fulfilled:
1) The step of source separation, defined as the distance between the acoustic
centres of the individual sources, is smaller than half the wavelength over the
bandwidth of operation.
