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Owner's Manual

Down Firing

The SM Series speaker systems also work well in a down firing configuration for spaces utilizing open beam ceilings such as offices,

restaurants and warehouses. When determining speaker spacing in down-firing installations, refer to the following chart:

Ceiling

Height

SM42T

10'

11'

10'

12'

13'

13.5'

14'

15'

16'

–

17'

–

18'

–

19'

–

20'

–

25'

–

30'

–

Note: Using the above spacing suggestions will maintain good, even high frequency coverage, which translates into excellent intelligi-

bility for voice reproduction and high fidelity music reproduction. To find out more about the formulas used to determine ceiling

speaker spacing, check out the book Sound System Engineering by Don and Carolyn Davis. To find out more about the limits of

wide dispersion loudspeakers, download the Atlas Sound white paper on the subject at

http://www.atlassound.com/Support/WhitePapers.aspx .

Surface Mount Loudspeakers

Speaker Spacing

SM52T

SM82T

–

10'

6.5'

12'

7.5'

13.5'

8.5'

15'

9.5'

16'

10'

17.5'

11'

19'

12'

20.5'

13'

22'

14'

23'

15'

–

19'

–

24'

SM42T = 90° Nominal Coverage at 2kHz

SM52T = 90° Nominal Coverage at 2kHz

SM82T = 65° Nominal Coverage at 2kHz

1601 Jack McKay Blvd. • Ennis, Texas 75119 U.S.A.

Telephone: 800.876.3333 • Fax: 800.765.3435

– 3 –

Specifications are subject to change without notice.

MAX SPL @ Highest Tap

(with the Listener @ 3.5')

SM42T

SM52T

97dB

102dB

96dB

101dB

94dB

99dB

93dB

98dB

92dB

97dB

91dB

96dB

90dB

95dB

89dB

94dB

–

93dB

–

93dB

–

92dB

–

92dB

–

91dB

–

SM82T

–

104dB

103dB

102dB

101dB

100dB

99dB

98dB

97dB

96dB

94dB

92dB

AtlasSound.com