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1601 JACK MCKAY BLVD. / ENNIS, TEXAS 75119 U.S.A.
TELEPHONE: (800) 876-3333 / FAX (800) 765-3435
AtlasSound.com
Specifications subject to change without notice
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SEVEN
Specifications subject to change without noticeSpecifications subject to change without noticeSpecifications subject to change without noticeSpecifications subject to change without notice
© 2004 Atlas Sound LP Printed in U.S.A. 00404 ATS001619 RevB 4/03 SL7-1429
SIREN LOUDSPEAKERS
FOR CONCEALED INSTALLATION
HPH-370GB
FEATURES
• 100-Watt Power Handling with High Intelligibility and Sound Penetration
• Rugged, All-Metal, Weather-resistant Construction
• Specifically Designed for Concealed Installation in Electronic Siren and Signalling Applications
APPLICATIONS
Utilize the HPH-370GB re-entrant, directional loudspeaker for concealed installation in electron-
ic signal, alarm, public address, and other high-intelligibility, mobile emergency communication
and signaling applications. Because of its compact size, the unit can be mounted under the
hood, in front of or behind the radiator, or near a fender-well of most fully equipped vehicles.
The HPH-370B (conservatively rated at 100 watts RMS in electronic siren use) is recommend-
ed for high-powered systems in public safety, civil authority, military, or emergency medical
applications.
GENERAL DESCRIPTION
Atlas Sound HPH-370GB siren loudspeaker is a double re-entrant type directional model with a
100-watt power rating. The assembly is compact in size and styled specifically for concealed
installation in limited space applications. Units can be mounted to any ambulance, fire, law
enforcement, utility, or other public service vehicle. A unique, heavy-duty, steel mounting brack-
et permits full-axis orientation of the loudspeaker for preferred sound-projection directivity. The
projector assembly is manufactured of welded, heavy-gauge steel and finished in black baked
epoxy for optimum durability and corrosion protection.
HPH-370B contains the patented Atlas Sound SD370A compression driver (U.S. Patent
#7,760,501) complete with a non-fatiguing, self-aligning sound chamber assembly. Units are
shipped complete with all components and installation data for field assembly. (Replacement
head assembly, Model K-370A for replacement driver assembly, SD-370A, is available for field
replacement). HPH-370B is suitable for use with matched amplifier and control equipment in
systems requiring AMECA (Automotive Manufacturer Equipment Compliance Agency, Inc.,
formally the AAMVA) certification to General Services Administration specifications
(KKK-A-1822C).
ENGINEER & PURCHASING SPECIFICATIONS
Siren loudspeaker shall be an Atlas Sound Model HPH-370GB. Assembly shall include a
double re-entrant loudspeaker and 11-ohm compression driver. Power rating shall be 100 watts
RMS at full range with nominal frequency response range of 450-4000 Hz. Sound level shall be
118dB when measured at full rated power at 3 meters (ref: .0002 dynes/cm
2
). Unit shall be fur-
nished with a steel mounting bracket and have a field-replaceable driver-head assembly.
SPECIFICATIONS
POWER FREQUENCY SOUND DIMENSIONS SHIPPING
MODEL RATING IMPEDANCE RESPONSE LEVEL (dB) DISPERSION W x H x D FINISH WEIGHT
100 Watts 105°
HPH-370GB RMS 11 Ohms Nominal 118dB* Mounted Ver. 4.75" x 11.621" x 4.625" Black 12 lbs
Nominal 450-4000 Hz (121 x 295 x 117 mm) Epoxy (5.4 kg)
(±6dB ) 100dB** 75°
Mounted Hor.
* Rated Power @ 1 meter ** Measured at 1 watt, 1 meter. (Ref.: .0002 dynes/cm
2
)
5.812"
4.7"
11.75"
8.0"
4.625"
DIMENSIONS