Overview: Atlas Sound surface mount speakers are designed for
commercial, professional, and residential applications. These weather-resistant,
full-range speakers can be used indoors or outdoors, in monaural or stereo
configurations. Each SM-series speaker comes with a C-shaped mounting bracket.
Construction: The Strategy Series surface-mount loudspeakers feature
weather-resistant construction for indoor or outdoor use year round. The
talc-impregnated, injection-molded polypropylene enclosure is UV-resistant to
withstand fading and breakdown. The speaker cabinet also withstands 100 hours of
salt spray testing (per ASTM B117). The enclosure features powder-coated
aluminum grilles with all-brass hardware inserts. The included heavy duty
steel C-bracket is Zinc Chromate-plated and powder-coated, and is color-matched to the
Paintable: The enclosure and grille can be painted to match your décor,
if desired. The cabinets should be primed with two coats of spray primer before
painting with oil or water-based house paint or spray paint. The grille should
be removed before painting with two thin coats of paint (primer not needed).
Care should be given not to clog the grille holes with paint.
Drivers: The Atlas Sound SM42T-B is equipped with a 1" Ferrofluid-cooled
dome tweeter, and a highly-efficient 4" polypropylene woofer. The drivers
are crossed over at 4kHz (6 dB/octave). The speaker's
Waveguide System provides a full 90° horizontal and 90° vertical coverage. The
PolyGuard High Frequency Circuit provides protection to the tweeter from
damaging transient signals.
Wiring Options: The SM42T-B has a two-pole barrier strip
terminal with a weather-resistant cover. The barrier strip can accept spade
connectors or bare wire. For runs up to 500', 18-gauge wire is recommended,
16-gauge wire for 500'-1000' runs, and 14-gauge for runs over 1000'. The speaker
is equipped with line matching transformers, requiring an amplifier capable of
driving a 70.7V line. Depending upon the amplifier's wattage rating and the
number of speakers being driven by the amplifier, you can select a 2, 4, 8, or
16-watt tap at 70.7V. You can also bypass the line transformers and connect the
speaker to a consumer amplifier (the speaker has an 8Ω impedance).
Speaker Placement: The speaker is wedge-shaped, which
provides a number of placement options. For outdoor use, the speaker can be
placed under an eave or other protective overhang. Indoors, you can use the
natural boundary effect to increase the overall output. When you mount the
speaker against one surface (wall), the boundary effect will increase the output
by 3dB. Mounting the speaker against two surfaces (two walls or a ceiling and
wall), the output increases by 6dB. Mounting the speaker against three surfaces
(in a corner near a ceiling), the output will increase by 9dB. The bottom of the
speaker cabinet is flat, and 90° to the speaker baffle, allowing you to place
the speaker on a shelf. You can also place the speaker horizontally in any
- Frequency Response: 115Hz - 16kHz (±5dB)
- Usable Low Frequency Limit (10dB down): 78 Hz
- Power Handling:
- 70.7V / 100V Systems: 2 - 16 watts
- 8Ω Systems: 30 watts RMS
- Sensitivity (1W/1M): 88dB
- Coverage Angles: 90° H x 90° V
- Dimensions: Width=5" Height=7" Depth=5-15/16"
- Weight: 1.5 pounds (w/o bracket)
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