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// Capabilities

Built to be heard, understood, and trusted.

Crystal-Clear Voice & Tone

Digital signal processing and AI-driven beamforming sharpen every syllable. Pre-recorded protocols, real-time text-to-speech, and live operator microphone, all delivered with the same field-tested clarity.

Remote Activation & Control

Fire any siren, zone, or the entire network from the SiSA™ console, desktop or mobile. Role-based authorization, dual-confirmation for live broadcast, and full activation audit logging on every event.

Self-Test & Health Monitoring

Scheduled silent and audible tests verify amplifier output, battery state, solar charge, and acoustic response. Faults raise an alert in SiSA™ before they become an outage, no truck rolls to find a dead siren.

Broad & Legacy Compatibility

Native SiSA™ integration plus open protocols let new sirens stand alongside existing infrastructure. Modernize coverage incrementally, retrofit legacy poles or extend a fully new network, on one platform.

Hurricane Helene response operations in Clearwater, Florida
HQE Systems intelligent voice siren Real-time monitoring dashboard tracking hardware performance metrics HQE Systems outdoor warning siren installation
// Two Product Lines

Two siren families, one platform.

HQE outdoor warning sirens come in two form factors. Both run on the same SiSA alerting software, the same connectivity, and the same SAFE Network certification. The difference is the acoustics and how the unit looks on your skyline.

HQE Systems outdoor warning sirens
Horn Style

HPSA X-Series

Form factorStacked horn cluster, classic high-output siren profile
Output109-131 dB directional · 103-124 dB omnidirectional
Max reachUp to 3,190 m (10,450 ft)
ConfigurationsDirectional (1 speaker) or omnidirectional (4 speakers)

Best for maximum reach over open terrain. Municipalities, refineries, military bases, large campuses, and wide-area outdoor coverage.

HQE Systems LS-120 line array siren datasheet illustration
Line Array Style

HPSA XLS120

Form factorSlim low-profile vertical column, visually discreet
Output121 dB, uniform in both directional and omnidirectional
Max reachUp to 1,100 m (3,600 ft)
ConfigurationsDirectional line array. Wall, parapet, or rooftop mount

Best for architecture-sensitive and urban sites. Rooftops, historic districts, campuses, and downtowns where a traditional horn cluster is visually unacceptable.

Choosing between them comes down to one question. If you need raw output and the longest possible reach, the horn cluster wins. If the unit has to disappear into the building it sits on, the line array wins.

// Coverage & Zoning

Right power level for every footprint, addressable down to the single pole.

Models scale from compact campus units to high-power regional arrays. Group sirens into named zones and broadcast a targeted message to one neighborhood or sound the whole jurisdiction at once. Configurations are available in 2, 4, ..., 28 and 32 horn arrays.

Compact

4 Horn

115 dB directional · 106 dB omni

Campuses, schools, single facilities, and tight industrial sites where precise, contained coverage matters.

Standard

12 Horn

127 dB directional · 121 dB omni

The municipal workhorse — neighborhoods, waterfronts, and town centers needing dependable wide-area voice.

High-Power

20 Horn

131 dB directional · 124 dB omni

Regional and critical-infrastructure scale — coastal warning, utilities, and wide-perimeter industrial zones.

Line Array Style

HPSA XLS120

121 dB directional · 121 dB omnidirectional

Low-profile vertical column. Uniform output in both directional and omnidirectional configuration.

Horn style figures above reflect the 2 to 32 horn array range. The HPSA XLS120 line array is a separate speaker family with its own acoustic profile.

// Deployment Scenarios

One system. With intelligent acoustic engineering.

A · Public Warning

Coastal, weather & mass-notification.

  • Tsunami & Flood EvacuationPre-staged voice protocols direct residents to specific routes and high ground — not just a wail to interpret.
  • FEMA IPAWS RelayNational and regional alerts flow through SiSA™ straight to the siren network with no manual rekeying.
  • Scheduled Civic TestsRoutine community test tones run on a calendar and confirm full-network readiness automatically.
B · Critical Sites
  • Installation-Wide AlertingLockdown, shelter-in-place, and all-clear messages reach every corner of a base or campus in one action.
  • Hazmat & Release ResponseZone-targeted voice broadcast keeps unaffected areas calm while directing the at-risk perimeter to act.
  • Perimeter Intrusion AlertsSensor-triggered tones and spoken warnings escalate response the moment a secured boundary is breached.
One platform, every zone. SiSA™ pushes targeted voice and tone alerts across communities and secured sites in a single action.
// Technical Specifications

Engineered, certified, and built to stand in the field for decades.

Sound Output109–131 dB directional (2-horn through 20-horn) · 103–124 dB omnidirectional
Audio SourcesClear voice · loud tone · music · combination — pre-recorded library, live operator mic, real-time text-to-speech
ConnectivityInternet (IP) · cellular (3G/4G/5G) · radio (UHF/VHF/P25) · TETRA · satellite · fiber · SAFE Network™
PowerAC (90–250VAC) · DC (12VDC) · solar · up to 30 days standby, 72 hours continuous activation (unlimited with solar backup)
Health MonitoringScheduled silent/audible self-test · amp, battery, charge & acoustic reporting to SiSA™
Environmental–13°F to 167°F operating range · IP66-rated control cabinet enclosure · high-grade aluminum, fully corrosion- and weather-resistant · pole, wall, roof or water-tower mounting
SecurityAES 256-bit encryption · DoD ATO/ATC · role-based authorization
Configurations2, 4, 6, 8, 10, 12, 16, 20, 24, 28 and 32 horn arrays
AmplificationBuilt-in Class-D amplifier · 500W (125W × 4 channels) per SiRcom SMART unit
Control & ScalabilityUp to 500 sirens per controller · up to 32 sirens per control cabinet · 99.99% uptime
// Installation

Installation & Mounting Configurations

The SMART non-penetrating roof sled mounts a full siren array on an existing rooftop without drilling a single hole through the roof membrane.

Outdoor warning siren sled technical brochure: non-penetrating roof sled mount with central mast, ballast trays and diagonal bracing

Non-penetrating roof sled frame

Outdoor warning siren sled technical brochure diagram

Ballast-weighted base, no roof penetration

Mount typeSMART non-penetrating roof sled, no roof penetration required
MaterialStainless steel
BaseSpace dependent. Base configurations can be modified to meet placement constraints
Base weightUp to 300 lbs depending on size of mast
Mast heightUp to 10 ft
Sled footprintUp to 6 ft
Speaker section height1.25 to 3 ft
Configuration weightDirectional 44 lbs (1 speaker), omnidirectional 176 lbs (4 speakers)
Alternative mountingPoles, walls, or rooftops using existing infrastructure

Both siren families mount on the sled, on a pole, or directly to a wall or parapet, so placement is driven by acoustics and sightlines rather than by what the structure will allow you to drill into.

Hardware configurations are subject to change without prior notice.

"We replaced a forty-year-old tone-only system with HQE's voice sirens. The first real activation, people knew exactly which way to evacuate — because the siren told them. That clarity is the whole job."
EM Emergency Management DirectorCoastal Municipality · SAFE Network™ deployment
// Ready When You Are

Hear the difference with intelligent voice.

Book a live demonstration or a coverage study for your jurisdiction. Our engineers will model your terrain, recommend siren placement, and show you the SiSA™ console in action.

Request a Coverage Study Call 1-800-967-3036