Atlas IED SD72W User Manual
Specifications subject to change without notice
© 2002 Atlas Sound Printed in U.S.A. 001102 ATS001451 RevA11/02 SL1-2022
2.41
One
1601 JACK MCKAY BLVD. / ENNIS, TEXAS 75119 U.S.A.
TELEPHONE: (800) 876-3333 / FAX (800) 765-3435
AtlasSound.com
8" PREASSEMBLED SPEAKER PACKAGE W/ BAFFLE
SD72W
SD72W SPECIFICATIONS
Size 8"(205mm)
Power Handling 25 Watts Peak, 15 Watts RMS
Sensitivity 97dB Average
Impedance 8 Ohms Nominal
Frequency Response 45Hz-19kHz Nominal, 55Hz-8kHz ±5dB
Dispersion 105° (2kHz Octave Band, -6dB Points)
Diameter & Depth 8.125"(205mm) Dia. & 2.875” (73mm) Deep
Mounting Dimensions 7.625"(194mm) Bolt Circle
Cone Material Treated Paper
Surround Material & Damping Damped Self Edge
Flux Density 10,600 Gauss, 1.06 Tesla
Magnet Weight Nominal, 10oz. (260g)
Basket Material Stamped Plated 20 ga. CRS
VC Diameter 1"(25mm)
VC Material Copper
VC Former Material Black Anodized Aluminum
VC Winding Width .225
"
Top Plate Thickness .239
"
Weight 32oz. (908g)
THIELE-SMALL PARAMETERS
Pe 15 watts
Fs 125Hz
Xmax .03
"
Resistance 7.3 ohms
Qts 0.8
Qes 0.95
Qms 5.2
BL 7.9 N/A
Efficiency 1.90%
Vas .32 (ft3)
Sd 33.2 (in2)
Le@1kHz .36 mH
Mms .39oz.
Cms .024 in./lb.
Transformer Specifications
Frequency Response 100Hz-10kHz (±1.5dB)
Primary Taps (Watts) .25, .5, 1, 2, & 5
Secondary Impedance (ohms) 8
Maximum Insertion Loss 1.5dB
Primary Termination 6"(152mm) Com. Lead Color Coded
Core Size
1
⁄2"X 5⁄8"(16 X 16mm)
Power Rating (Watts) 5
FEATURES
• 10oz dual cone speaker provides familiar response & performance
• Quality 5 watt-dual voltage transformer
• Attractive CRS white powder coat baffle
• Individually packaged for stocking & ordering convenience
APPLICATION
The SD72 W is an aggressively priced, high quality speaker/baffle
transformer package suitable for most any paging or background
application including retail stores, restaurants, schools and other
institutional facilities.
GENERAL DESCRIPTION
The speaker used in the SD72 W is the next generation of Atlas high
performance cone loudspeakers, very similar to the preceding
C-Series speakers. The similarity in the sonic qualities ensures that
contractors and designers who have worked with the Atlas Sound
C-Series in the past will know exactly what to expect when they use
the SD72W. Model SD72W is a dual cone, 25 watt 8" (205mm)
loudspeaker with a 10oz. (260g) ceramic magnet. It includes a
curvelinear, treated paper cone for lower harmonic distortion. The
loudspeaker is also equipped with a full 1" diameter copper voice coil
with a black anodized aluminum former for better power dissipation.
Model SD72W operates within a frequency response range of 45Hz19kHz (nominal) with a sensitivity of 97dB and a dispersion angle of
105°. Package includes factory installed 25/70.7V line matching transformer with tap selections ranging from .25 to 5 watts. The SD72 W
includes a factory installed CRS baffle with concealed loudspeaker
mounting studs and includes screw mount hardware. The SD72W
baffle features standard mounting holes to accommodate the majority
of Atlas Sound 8" tile bridges, mounting rings and enclosures. When
specifying mounting hardware be advised that the dimensions of the
SD72W baffle match the Atlas Sound Model 62-8. The baffle finish is
white powder coat epoxy.
ARCHITECT & ENGINEER SPECIFICATIONS
Unit shall be Atlas Sound 8" loudspeaker Model SD72W utilizing line
matching transformer and white CRS baffle. It shall have a (10oz.)
ceramic magnet and a seamless cone. Frequency response range
shall be 45Hz-19kHz (nominal). Sensitivity shall be 97dB 1W/1M.
Voice coil shall be black anodized aluminum to help dissipate heat,
have an impedance of 8 ohms and a diameter of 1" (25mm).
Transformer primary voltage shall be 25V/70.7V with a frequency
response range of 45Hz-19kHz (nominal). Insertion loss shall not
exceed 1.5dB. Unit shall include factory installed CRS baffle. Baffle
shall include welded speaker mounting studs and all necessary
hardware to match the baffle to associated optional hardware. Baffle
overall diameter shall not exceed 12
3
⁄4” (324mm) Baffle shall be fin-
ished in white powder coat epoxy.
SD72W
(Front View) (Rear View)
Specifications subject to change without notice
© 2002 Atlas Sound Printed in U.S.A. 001102 ATS001451 RevA11/02 SL1-2022
1601 JACK MCKAY BLVD. / ENNIS, TEXAS 75119 U.S.A.
TELEPHONE: (800) 876-3333 / FAX (800) 765-3435
AtlasSound.com
Fundamental
Fundamental vs. 2nd & 3rd Harmonics
(Transformer Bypassed)
SD72W Frequency Response
(Transformer Bypassed)
SD72W Impedance
(Transformer Bypassed)
Frequency Hz
Frequency Hz
dB Pa
Ohms
dB Pa
Frequency Hz
2nd Harmonic
3rd Harmonic
* (C) Speaker mounting stud pattern.
** (D) Baffle mounting hole pattern.
▲
EQ81 tile bridge works only with 96-8 Series enclosures.
SD72W BAFFLE INFORMATION
DIMENSIONS MOUNTS OPTIONAL
MODEL DIA.(A) PROJECTS (B) (C)* (D)** ENCLOSURE (OR) MTG. RING TILEBRIDGE
SD72W 123⁄4"
1
⁄4"7
5
⁄8"11
1
⁄4"
(EZ )95-8 Series, T95-8 Series,
75-8(E1)(E2), 81-8R(S)
(324mm) (6mm) (194mm) (286mm) EZ96-8, CS95-8(NS), 76-8(E1)(E2),
199-8, Q408, 96-8 Series
▲
P77-8, P78-8 EQ81s
▲
Side ViewFront View
SD72W OCTAVE BAND POLARS
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