Meyer Sound UPA-1P - Manual (Page 8)

&
vidual speaker, the power at the center of the array in-
creases, but the coverage overlap between adjacent speakers
causes comb filtering and other frequency response variations.
As the splay angle increases toward the coverage angle,
the power at the center of the array decreases, but the
variations in frequency response diminish. As the splay
angle increases beyond the coverage angle, noticeable
gaps begin to form in the array’s coverage area.
Measurement and Correction Tools
It is recommended that even the most carefully assembled
sound systems be analyzed with precise measurement
tools. We recommend using the Meyer SIM® System II
Sound Analyzer
and CP-10 Parametric Equalizer to
• choose, place, and array speakers;
• measure propagation delays between speakers to
set the correct polarity and delay times;
• measure and equalize variations in frequency re-
sponse caused by the acoustical environment and
the placement and interaction of speakers.
UPA-P with the USW-1P
UPA-P Frequency Range: 60 Hz – 18 kHz
USW-1P Frequency Range: 32 Hz – 150 Hz
Two UPA-Ps placed on top of, and coplanar to, one half-
space loaded USW-1P were designed to produce a flat
system frequency response (32 Hz – 18 kHz) when the
same full-range signal is sent to all speakers. It is impor-
tant to emphasize that the UPA-P and USW-1P are in
phase in the region in which their responses overlap (60
– 120 Hz).
All Meyer self-powered subwoofers have internal cross-
overs which enable them to receive full-range signals.
UPA-Ps and USW-1Ps can be configured in a wide vari-
ety of array configurations to suit specific application
needs. The following section shows four recommended
configurations.
For additional system design ideas, contact Meyer Sound
for the following TechNotes on UPA-P array design:
• Two UPA-1Ps @ 70° Horizontal Splay
(Doc #: 01.990.101.90 A)
• Two UPA-1Ps @ 85° Horizontal Splay
(Doc #: 01.990.101.91 A)
• Two UPA-2Ps Tightpack (Doc #: 01.990.101.92 A).
• Three UPA-2Ps Tightpack (Doc #: 01.990.101.93 A).
These documents are also available on the Meyer Sound
website: http://www.meyersound.com.
A single UPA-1P paired with a USW-1P provides < 134 dB
SPL across 100
°
of horizontal coverage.
For a system that requires a wider horizontal coverage
area, we recommend using two UPA-1Ps splayed at 85
°
with a single USW-1P. The array pictured below pro-
vides < 136 dB SPL across 180
°
of horizontal coverage.