Atlas AH9040S User manual

1601 JACK MCKAY BLVD. ENNIS, TEXAS 75119 U.S.A.
TELEPHONE: [phone]
FAX [phone] AtlasSound.com 1/4
©2008 Atlas Sound SL2-2083 ATS002225 RevC 1/08
Features
• Effi ciency rating of 102.5 dB (1 W/1 M)
• 250 watts power handling
• Maximum output of 126.5 dB (Rated Power @ 1 M)
• Constant directivity design offers controlled coverage of
90˚ H by 40˚ V (2 kHz octave band)
• Excellent low frequency response provides bass you can feel
• Driver complement includes a 15" cast frame woofer with a
concentrically mounted 1" exit compression driver coupled to a
90˚ H x 40˚ V HF horn
• Full range frequency response of 75 Hz – 14.5 kHz (±5 dB)
• Easy, weather resistant connection via a 4-pole terminal block
connector
• 8 Ω nominal system impedance
• Heavy duty stainless steel mounting bracket (included) allows for
easy installation to almost any fl at surface
• Three forged eyebolts also included for suspended installation
Applications
Atlas Sound model AH9040S stadium horn is ideal for shorter throw and
wide coverage where full range reproduction, maximum intelligibility,
and high sound pressure levels are required. Applications include football
stadiums, sports arenas, baseball fields, convention centers, and audito-
riums.
Weather resistant construction features of the AH9040S include a mul-
tiple screen configuration to prevent moisture from damaging internal
components: A perforated aluminum screen covers the large horn
mouth, a secondary screen is in place forward of the high frequency
driver, and a third tightly perforated screen protects the 15" cast frame
woofer.
Installation
A heavy-duty stainless steel "C" style mounting bracket is included with
the AH9040S to allow easy mounting to most any flat surface. Three
drop forge eyebolts are also pre-installed (2-front of horn plus 1-rear
for "pull-up") for suspension mounting via load rated aircraft cable. (Use
caution when suspending any object overhead. Refer to the installation
manual for more details).
The AH9040S includes a 4 pole terminal block, weather resistant con-
nector on the underside of the device for easy hook-up and daisy chain
wiring to other AH9040S. If 70.7/100V operation is required, the optional
Atlas Sound AF140 autoformer may be used. NOTE: Due to the full
range operation capabilities of the AH9040S 70.7/100V operation is pos-
sible, but discouraged. Better frequency response and amplifier dampen-
ing factor can be realized by using large gauge (#10 to #12) home runs
and series/parallel hook-up wiring at the head end location with direct
coupled, low impedance amplifiers. Generally speaking, this improve-
ment of frequency response and amplifier dampening factor is worth the
sacrifice of line loss over distance - especially if transformer insertion
loss at the loudspeaker location is considered.
AH9040S
AH9040S
15” 2-way Stadium Horn System 90° x 40°
AH9040S

1601 JACK MCKAY BLVD. ENNIS, TEXAS 75119 U.S.A.
TELEPHONE: [phone]
FAX [phone] AtlasSound.com 2/4
©2008 Atlas Sound SL2-2083 ATS002225 RevC 1/08
Technical Specifications
Power Handling: 250 watts (45V) RMS
Sensitivity (1W / 1M): 102.5 dB SPL
(75 Hz – 14.5 kHz 1⁄3 octave bands)
Frequency Response: 75 Hz – 14.5 kHz (±5 dB)
Dispersion: 90˚ x 40˚
Nominal Impedance: 8 Ω
Minimum Impedance: 5.6 Ω @ 9000 Hz Nominal -6dB
Height: 24.91" (632.71 mm)
Width: 29.57" (751.08 mm)
Depth: 29.65" (753.11 mm)
Shipping Weight: 152 lbs (68.95 kg)
Driver Type: 1" HF & 15" LF
Architect & Engineer Specifications
Loudspeaker shall be Atlas Sound Model AH9040S or approved equal.
Loudspeaker shall be a 2-way design incorporating an environment-resis-
tant housing.
Loudspeaker shall include a 15", horn loaded, cast frame woofer housed
in a 2296 in3 (1.3 ft3) enclosure and an integral, concentrically mounted 1"
exit compression driver coupled to a constant directivity high frequency
horn. The three pole (18 dB/octave) dividing network crossover fre-
quency shall be 1.4 kHz. The dividing network shall include a poly switch
protection circuit for the high-frequency component.
The loudspeaker system shall be capable of providing a sound dispersion
angle of 90˚ horizontal by 40˚ vertical in the 2 kHz octave band.
Rated power shall be 250 watts based on EIA Standard RS-426B*.
Enclosure shall be UV-resistant, steel reinforced, low pressure injection
molded fiberglass and shall include a 3 stage multiple mesh filter system
for weather and rodent resistance:
A. Large 20-gauge perforated aluminum screen on front mouth
assembly.
B. 100 x 100 weave stainless steel mesh between HF horn and HF
driver.
C. 100 x 100 weave stainless steel mesh over 15" woofer.
Sensitivity shall be 102.5 dB SPL (75 Hz to 17 kHz 1⁄3 octave bands) mea-
sured at a distance of 1 meter on axis with a 1 watt input.
Overall frequency response shall be 75 Hz – 14.5 kHz (±5 dB).
The loudspeaker shall include a stamped and formed, 12-gauge stainless
steel mounting bracket assembly for surface mounting and three M8
drop forged eyebolts for suspension mounting.
The input section located on the bottom rear of the loudspeaker shall
include a 4 pole terminal block connector.
Nominal impedance shall be 8 Ω.
Dimensions shall be: Height 24.91" (632.71 mm)
Width 29.57" (751.08 mm)
Depth 29.65" (753.11 mm)
Weight 152 lbs (68.95 kg)
* EIA test spectrum is applied for eight hours.
(This procedure provides a rigorous test of both thermal and
mechanical failure modes.)
14.21
29.65
28.33
29.57
22.58
24.91
29.65"
(753.11 mm)
14.21"
(360.93 mm)
28.33"
(719.58 mm)
24.91"
(632.71 mm)
22.58"
(573.53 mm)
29.57"
(751.08 mm)

1601 JACK MCKAY BLVD. ENNIS, TEXAS 75119 U.S.A.
TELEPHONE: [phone]
FAX [phone] AtlasSound.com 3/4
©2008 Atlas Sound SL2-2083 ATS002225 RevC 1/08
AH9040S Horizontal Beamwidth (-6 dB)
AH9040S Vertical Beamwidth (-6 dB)
AH9040S Frequency Resonse

1601 JACK MCKAY BLVD. ENNIS, TEXAS 75119 U.S.A.
TELEPHONE: [phone]
FAX [phone] AtlasSound.com 4/4
©2008 Atlas Sound SL2-2083 ATS002225 RevC 1/08
AH9040S Impedance (ohms) vs. Frequency
AH9040S Horizontal Polars (Normalized to Zero on Axis) (-6 dB)
AH9040S Vertical Polars (Normalized to Zero on Axis) (-6 dB)