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APT-34AT
Omni-Purpose® 30-Watt Bi-Directional Loudspeakers
APT-34AT
Features
• Twin Reflex Projectors Provide High Efficiency Bi-di rec tional
Sound Dispersion
• Element Resistant Construction for Indoor or Outdoor Installations
• Built-In 25V, 70.7V, 100V Transformer with Seven-Position, Impedance
Switch for Application Versatility
• Omni-Purpose Mounting Bracket for Positioning Flexibility on Vertical
or Horizontal Planes
• Optional Accessories for Vandalism Protection
Applications
Surface mounting loudspeaker utilizes a single driver and twin pro jec tor
to provide cost-ef fi cient, bi-di rec tional sound dis per sion. En vi ron ment
resistant as sem bly is rec om mended for pag ing, talkback, se cu rity and
tone sig naling in corridors, stair wells, walkways, under eaves and along
building pe rime ters of trans por ta tion platforms, warehouses, loading
docks, parking lots, garages, sports, and recreational facilities.
General Description
Atlas Sound Model APT-34AT is a high-intelligibility loud speaker with
a single compression driver which delivers 30 Watts of power and
175˚ sound dis per sion in opposite directions. It in cor po rates the
ex clu sive Vari-Tap®-control connect center, which features a built-in
25V, 70.7V,100V trans former and a seven-position watts/im ped ance
switch (screwdriver adjustable) with a 45Ω tap. Model APT-34AT is
environment-resistant and in cludes a protective ter mi nal cover with builtin cable strain relief for ver sa tile indoor/out door inter com and sig naling
use. The single ad justment Omni-Purpose mounting bracket pro vides
po si tion ing flexi bil ity on conventional surface installations (vertical and
hori zon tal planes) and in cludes pro vi sions for strap-mounting to I-beams
or pillars. Dimensions are 161⁄2" L x 93⁄4" Diameter (419mm x 248mm).
For cable/conduit in stal la tions, Model BX-2A is avail able. APT-34AT is
finished in durable grey epoxy. Weight is 9 lbs.(4.1kg).
©2011 Atlas Sound L.P. All rights reserved. Atlas Sound and Strategy Series are trademarks of Atlas Sound L.P. All other trademarks are the property of their respective owners. ATS004103 RevA 7/11
Specifications
Model APT-34AT
Power Rating 30 Watts
Frequency Response 450Hz–12.5kHz (±5dB)
Sensitivity 101dB 1 Watt /1 Meter (avg)
Dispersion Angle 175° (-6dB, 2000 Hz octave band)
Length 161⁄2" (419mm)
Diameter 93⁄4" (248mm)
Weight 9 lbs. (4.1kgs)
Finish Baked epoxy
Power Taps
25V .9, 1.8, 3.7, 7.5, 15
70.7V 1.8, 3.7, 7.5, 15, 30
100V 4, 7.7, 15, 30
Driver Protection
The horn loudspeaker should not be operated at frequencies outside the
horn cut-off. It is suggested that any program material be high-passed
at 300Hz with a 6dB per octave filter. This can be done with a low level
filter at the amplifier input or by a series capacitor at each loudspeaker.
Electrolytic capacitors can be used but they must be non-polarized (See
Typical Capacitor Values Chart).
Typical Capacitor Values
8Ω Driver 25V Line 70V Line 100V Line
70 mfd 30 mfd 4 mfd 2 mfd
Electrolytic capacitors can be used but they must be non-polarized.
1601 JACK MCKAY BLVD. ENNIS, TEXAS 75119 U.S.A.
TELEPHONE: (800) 876-3333
FAX (800) 765-3435
AtlasSound.com
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1
3
⁄4"
16 1⁄2"
9 3⁄4"
Mounting Flange
9
⁄32" Diameter
3 Holes 120°
Apart, On 2.312
Bolt Circle
Architect and Engineer Specifications
Loudspeaker shall be bidirectional, twin projector Atlas Sound APT34AT or ap proved equal. Full range audio power rating shall be 30
Watts. Frequency re sponse shall be 400Hz –12,500kHz (nominal),
450Hz–12.5kHz (±5dB). Sound pressure level shall be 112dB
(30W/1M), 101dB (1W/1M). Sound dis per sion of the double re-entrant
type dual-exponential bells shall be 175˚ in each di rection. Model
shall have impedance selection via seven position switch including a
45-Ω tap. Power taps shall be available at 0.9, 1.8, 3.7, 7.5, 15 Watts
on 25V line, 2, 3.8, 7.5, 15, and 30 Watts on 70.7V line and 4, 7.7,
15 and 30 Watts on 100V line. For wiring and vandalism protection,
Atlas Sound __________ (Model BX-1A) ar mored cable adapter shall
be avail able where speci fied. Finish shall be grey baked epoxy.
Di mensions shall be 161⁄2" (419mm) long x 93⁄4" (248mm) bell di ameter.
Weight shall be 9 lbs. (4.1kg).
Accessories
BX-2A. Vandal Resistant Cover Plate for Armored Cable and Conduit
Connection. Constructed of Cast Aluminum.
2"
27⁄8" Diameter
1
⁄2" Banding Slot
Atlas Sound products are designed and tested in our well-equipped research laboratory which contains a fully anechoic chamber, complete analog Bruel & Kjaer
measurement equipment and the TEF 20® audio analyzer. Atlas Sound is proud to be a beta site for TEF® software.
APT-34AT Polars (Normalized to Zero on Axis) (-6dB)
©2011 Atlas Sound L.P. All rights reserved. Atlas Sound and Strategy Series are trademarks of Atlas Sound L.P. All other trademarks are the property of their respective owners. ATS004103 RevA 7/11
1601 JACK MCKAY BLVD. ENNIS, TEXAS 75119 U.S.A.
TELEPHONE: (800) 876-3333
FAX (800) 765-3435
AtlasSound.com
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SPL in dB
APT-34AT Frequency Response
Frequency (Hz)
©2011 Atlas Sound L.P. All rights reserved. Atlas Sound and Strategy Series are trademarks of Atlas Sound L.P. All other trademarks are the property of their respective owners. ATS004103 RevA 7/11
APT-34AT Harmonic Distortion
Magnitude (dB)
Frequency (Hz)
1601 JACK MCKAY BLVD. ENNIS, TEXAS 75119 U.S.A.
TELEPHONE: (800) 876-3333
FAX (800) 765-3435
AtlasSound.com
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