Best Low Frequency Horn Strobe Solutions for Fire Safety
Low frequency horn strobes are designed to provide clear audible alerts paired with visible strobes, ideal for sleeping areas or spaces requiring distinctive alarm signals. This guide highlights five compatible systems from System Sensor and Gentex that focus on low-frequency output, wide candela options, and straightforward installation. Each option offers varying candela settings, wiring schemes, and synchronization capabilities, enabling you to tailor alarms to the target space while meeting NFPA requirements. Use the buying guide at the end to compare key factors and select the best fit for your building.
Summary of selected products:
| Product | Brand | Candela Options | Mounting | Notes |
|---|---|---|---|---|
| System Sensor P2WL-LF L-Series Indoor Low Frequency Sounder Strobe | System Sensor | 15, 30, 75, 95, 110, 135, 185 | Wall | 2-Wire, NFPA compliant |
| System Sensor P2RL-LF L-Series Indoor Low Frequency Sounder Strobe | System Sensor | 15, 30, 75, 95, 110, 135, 185 | Wall | Sync-ready, modernized look |
| GENTEX GHSLF110W Low Frequency Horn/Strobe | GENTEX | Low Frequency horn/strobe (Wide range) | Wall | High visibility, reliable signaling |
| Gentex GEC3-24WR 24VDC Low Profile Evacuation Horn & Strobe | Gentex | Selectable Candela (varies by model) | Low-profile | Super-Slide wiring, instant checks |
| GENTEX GHSLF15W Low Frequency Horn/Strobe | GENTEX | Fixed 15 Candela | Wall | Simple, fixed-output option |
System Sensor P2WL-LF L-Series Indoor Low Frequency Sounder Strobe
The P2WL-LF is a two-wire, wall-mount unit with a selectable low-frequency sounder and strobe. It supports a Full candela range with multiple field-selectable settings to optimize current draw for various installations. Options include both high/low and temperature-based settings, as well as continuous operation. This model is NFPA compliant for reliable life safety signaling and features a plug-in design that minimizes intrusion into the back box.
System Sensor P2RL-LF L-Series Indoor Low Frequency Sounder Strobe
The P2RL-LF mirrors the P2WL-LF with a two-wire, wall-mount design and field-selectable candela settings. Its compatibility with the MDL3 sync module and modernized aesthetics support synchronized signaling across devices. It offers wall and ceiling candela options (15–185 for walls; 15–177 for ceilings) and includes a Rotary switch for High/Low and timing selections, enabling precise alarm behavior while reducing installation complexity.
GENTEX GHSLF110W Low Frequency Horn/Strobe
GHSLF110W is a low-frequency horn/strobe designed for wall mounting, offering robust fire safety signaling with a focus on audible clarity in sleeping or quiet environments. Gentex emphasizes nationwide service and support, which can be a factor for facilities needing reliable supplier partnerships. This model is built to deliver dependable coverage with clear horn output paired with a conspicuous strobe.
Gentex GEC3-24WR 24VDC Low Profile Evacuation Horn & Strobe
The GEC3-24WR provides a low-profile horn/strobe solution with prewire simplicity and a Checkmate feature for voltage verification and streamlined supervision testing. It supports high/low dBA and frequency settings, a tempo option, and a synchronization-ready architecture. The unit is designed for ease of installation, with a surface-mount box option and a Gentex Synchronization Module to coordinate multiple devices for a unified alert.
System Sensor Horn Strobe, White
This System Sensor unit focuses on both audible alarms and visual alerts with a simple white finish suitable for various installations. It emphasizes a compact, reliable signaling solution sourced from a recognized fire safety manufacturer. It’s a straightforward option when a minimal configuration is desired, though specifics on candela and tone options should be reviewed for exact project requirements.
G4LFWN-HVM Low Frequency Horn Strobe
The G4LFWN-HVM introduces a low frequency design with a 520 Hz tone aimed at environments requiring enhanced auditory clarity, such as sleeping areas. Genesis FullLight technology distributes light evenly for improved visual signaling. The unit offers a slim profile of just one inch from the mounting surface, balancing unobtrusiveness with full functionality and a modern look for contemporary installations.
GENTEX GHSLF15W Low Frequency Horn/Strobe
GHSLF15W provides a fixed 15 candela output with a wall-mount configuration. This model is designed for straightforward installation where a consistent, portable signaling output is sufficient. As with other Gentex products, compatibility with Gentex synchronization and supervision features can help ensure coordinated alerts across a system.
Buying Guide: Key Purchase Considerations
- Frequency and tone: Low-frequency horn tones (typically around 520 Hz) are chosen to improve audible clarity in quiet or sleeping environments. Confirm the exact tone range and whether the model supports multiple tones or continuous signaling as needed.
- Candela settings: Look for models with adjustable candela (field-selectable) to tailor the visual alert to room size and mounting distance. If uncertain, choose a unit with a wide candela range for flexibility.
- Wiring and power: Many options use 2-wire connections and are compatible with common fire alarm control panels. Ensure your system supports the device’s voltage (e.g., 24 VDC) and that the wiring path accommodates back box clearance.
- Mounting and form factor: Wall-mount units are typical for low-frequency horn strobes. Consider a slim profile if aesthetics or space constraints are important, and check whether ceiling mounting is needed in some areas.
- Synchronization and integration: If deploying multiple devices, synchronization modules or built-in coordination features help ensure simultaneous signaling. Verify compatibility with MDL3 or similar modules if you plan to synchronize.
- Compliance and testing: NFPA-compliant devices provide documented performance in line with life-safety standards. Look for features that simplify testing, such as “Checkmate” voltage verification or supervision-ready wiring.
- Environment and visibility: For sleeping areas, prioritize devices with clear light output and stable strobe intensity across the intended coverage area. Consider the color and finish if the unit must blend with interior design.
- Brand and support: Established brands like Gentex and System Sensor offer extensive documentation, support, and readily available replacement parts, which can reduce maintenance overhead over time.
Choosing the best low frequency horn strobe requires balancing audible clarity, visual signaling, installation practicality, and compliance. The five products highlighted above cover a spectrum of candela options, mounting styles, and synchronization capabilities, providing reliable options for different facility needs. Always verify compatibility with your existing fire alarm control panel and local codes before purchase.