Designing An X1 Or X2 Array; Applications For Which X-Line Advance Arrays Are Most Appropriate; Determining X1 And X2 Array Configuration With Laps - Electro-Voice X1-212/90 Installation Manual

4

Designing an X1 or X2 array

4.1 Applications for which X-Line Advance arrays are most
appropriate
The X1 and X2 loudspeaker systems are specifically designed to construct acoustically
coherent line-arrays. Line-array systems typically consist of independent columns of
loudspeaker enclosures. The most common implementation is a stereo sound reinforcement
system with two (2) columns (left and right). Additional columns are sometimes added to
cover different seating sections of a venue, e.g., seating areas that wrap around the side or
back of a stage. An additional column is also used in left-center-right configurations, with the
center channel for speech. In some venues, where stereo is not required, good coverage can
often be obtained with a single array. A variation of such a monaural system is the exploded
array, where two (2) or more widely spaced arrays are used to provide the horizontal coverage
required. Also, a large number of arrays may be used in distributed systems, such as in an
arena.
Notice!
The X1 and X2 line arrays, even though mechanically are identical, they are not designed
acoustically to work in the same column.
The exact number of X1 or X2 loudspeaker systems in a column varies depending on the
vertical acoustic coverage required for the specific venue. Furthermore, the relative vertical
angles between the boxes and SPL also depend on the venue's acoustic coverage
requirements. Acoustic design techniques are outside the scope of this document and the
reader is directed to LAPS 3 (Line Array Prediction Software) or later modeling software
available from the Electro-Voice website www.electrovoice.com for acoustic design assistance.
Although the full-range X1 and X2 loudspeaker systems shown in Dimensions, page 9 are not
horizontally symmetrical, their acoustical polar responses are substantially symmetrical. Thus,
stereo left and right arrays, or left-center-right arrays may be constructed with the
loudspeakers in their normal right-side-up orientation.
4.2

Determining X1 and X2 array configuration with LAPS 3

LAPS 3 is software written in MATLAB with Excel-spreadsheet-based frontend interface for
determining optimum array configurations for a given venue and trim heights. The current
version of LAPS 3 is downloadable from the Electro-Voice website www.electrovoice.com.
Electro-Voice Installation Manual
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2015.04 | 02 | F.01U.310.953