TOA bs-1030 User Guide
TOA Electronics Speaker Guide
Speaker Application Tables
35
Wall-mount Speakers
Spacing recommendations for wall-mounted speakers will vary dramatically depending on the
height and aiming of the speakers, whether there is a facing wall, and how far away it is. When
there is a facing wall up to 30 ft away, speakers should be staggered: speakers on one wall
should be located and aimed mid-way between those on the opposite wall. If the facing wall is
more than 30 ft away, we recommend using ceiling or other speakers to cover the center of the
room to avoid echoes that degrade intelligibility. In outdoor areas, it is best to place speakers
back-to-back, aimed outward when broad coverage is needed.
height and aiming of the speakers, whether there is a facing wall, and how far away it is. When
there is a facing wall up to 30 ft away, speakers should be staggered: speakers on one wall
should be located and aimed mid-way between those on the opposite wall. If the facing wall is
more than 30 ft away, we recommend using ceiling or other speakers to cover the center of the
room to avoid echoes that degrade intelligibility. In outdoor areas, it is best to place speakers
back-to-back, aimed outward when broad coverage is needed.
Downward Tilt refers to the number of degrees below horizontal the speaker is aimed.
Coverage Area is a very conservative estimate of the triangular area within which coverage will
not vary more than
not vary more than
±
3 dB (
±
4 dB where the downward tilt is 10°, due to the effects of distance),
when averaged over the frequency range of 1–4 kHz.
Coverage Depth refers to the minimum, or perpendicular, distance between the far limit of the
coverage area and the wall or surface that the speaker is mounted on. For best coverage, listen-
ers should be no farther from the wall (pole, etc.) than this.
coverage area and the wall or surface that the speaker is mounted on. For best coverage, listen-
ers should be no farther from the wall (pole, etc.) than this.
Maximum Spacing for Rated Coverage Depth: This number is equal to the width of the trian-
gular coverage area at its wide end. The coverage area is this wide when the farthest listeners
are a distance from the base of the speaker’s mounting surface equal to the value of Coverage
Depth. For example, if the Coverage Depth is 20 ft, and the Edge to Edge Spacing is 25 ft, then
the far left corner of one speaker’s coverage meets the far right corner of another speaker’s cov-
erage at a point 20 ft perpendicular from the wall on which the speakers are mounted. Maxi-
mum spacing should only be used indoors, when speakers are placed on two facing walls, and
when the distance between the walls is approximately equal to the rated Coverage Depth. Clos-
er spacing is needed if the walls are closer than the rated Coverage Depth.
gular coverage area at its wide end. The coverage area is this wide when the farthest listeners
are a distance from the base of the speaker’s mounting surface equal to the value of Coverage
Depth. For example, if the Coverage Depth is 20 ft, and the Edge to Edge Spacing is 25 ft, then
the far left corner of one speaker’s coverage meets the far right corner of another speaker’s cov-
erage at a point 20 ft perpendicular from the wall on which the speakers are mounted. Maxi-
mum spacing should only be used indoors, when speakers are placed on two facing walls, and
when the distance between the walls is approximately equal to the rated Coverage Depth. Clos-
er spacing is needed if the walls are closer than the rated Coverage Depth.
Ceiling
Speaker
height (h)
height (h)
Ear
height (l)
height (l)
Wall
Coverage angle
(adjusted for distance)
(adjusted for distance)
Floor