Introduction to the Ajax StreetSiren S DoubleDeck
The Ajax StreetSiren S DoubleDeck (Superior S-line) 70227.61 is a wireless outdoor siren designed for use with Ajax Jeweller alarm systems. Combining a powerful piezo speaker, bright LED visual signalling and robust two‑way wireless communications, this device is built to deliver loud, reliable local alerts and system feedback in outdoor and semi‑outdoor environments. With an adjustable alarm level between 85 and 113 dB, tamper detection, optional external power and a compact, weather‑resistant enclosure, the StreetSiren S DoubleDeck is aimed at installers and end customers who need a dependable, easy‑to‑configure audible deterrent for homes, small businesses and critical outdoor assets.
Key features at a glance
- Powerful, adjustable alarm:85–113 dB (at 1 m) with selectable alarm duration from 3 seconds up to 3 minutes.
- Secure wireless communications:Uses Ajax Jeweller protocol on 868.0–868.6 MHz with encrypted transmission, frequency hopping and an open‑space range of up to ~1,500 m.
- Dual power options:Pre‑installed 4× CR123A batteries (nominal life up to ~5 years) plus optional 12 V DC external input for continuous operation with batteries as backup.
- Robust protection:Enclosure tamper, accelerometer for movement/removal detection and jamming detection help maintain device integrity.
- Outdoor‑ready design:IP54 rating, operating temperatures from −25 °C to +60 °C and a compact footprint suitable for various mounting locations.
Detailed specifications and benefits
Understanding the technical details helps explain why this siren performs well in real‑world deployments. Below is a breakdown of the most relevant specifications and the practical benefits they deliver.
The StreetSiren S DoubleDeck uses the Jeweller protocol on 868.0–868.6 MHz, employing GFSK modulation and frequency hopping. With up to 25 mW ERP and an advertised open‑space range of about 1,500 m, the siren supports reliable two‑way communication with Ajax Hubs and ReX extenders. Encrypted messages and hopping reduce the risk of interception and interference, which is particularly important for outdoor installations where RF noise can be higher.
The siren’s piezo sounder is adjustable between 85 and 113 dB at 1 m, allowing installers to tailor volume to the site: high for open yards and industrial settings, moderate for residential areas to reduce disturbance while still deterring intruders. Alarm duration is configurable from short chirps of 3 seconds to sustained alerts up to 3 minutes. A bright LED frame provides a visual alarm indication and chime functionality, improving visibility for passers‑by and cameras, and supporting silent alarm verification workflows.
Primary power comes from four pre‑installed CR123A batteries with a nominal life of up to about five years under typical reporting conditions. For installations requiring continuous power, the siren accepts a 12 V DC external input (operating range 6–20 V) while retaining batteries as an automatic backup. This hybrid approach minimizes maintenance and keeps the siren operational during mains or external supply interruptions.
Built‑in tamper switches and an accelerometer detect attempts to remove, move or tamper with the enclosure. The device also includes jamming detection to alert the central system if RF interference is detected. These anti‑sabotage measures increase the likelihood that attempts to neutralize the siren will be detected and reported promptly to the monitoring hub.
The IP54‑rated enclosure offers dust protection and splash resistance suitable for most outdoor placements, and the operating temperature range of −25 °C to +60 °C covers harsh climates. At approximately 200 × 200 × 55 mm and a weight around 517–571 g, the unit is compact enough for unobtrusive mounting yet visually authoritative when activated. A clip‑lock brandplate enables optional custom faceplate branding for installers or customers.
Use cases and scenarios where the siren excels
The StreetSiren S DoubleDeck is versatile and particularly well‑suited to the following scenarios:
- Residential perimeters:Mounted on gates, fences or external walls to provide a loud deterrent for would‑be intruders and rapid audible notification for neighbours.
- Small business and retail storefronts:External placement above shopfronts or loading bays increases visibility and audibility of alarms, deterring break‑ins and alerting staff and customers.
- Construction sites and temporary facilities:Wireless setup and long battery life allow quick deployment where mains power or wired infrastructure is unavailable.
- Remote assets and outbuildings:Equipment storerooms, workshops and agricultural buildings benefit from a battery‑backed siren with optional DC input for sites that sometimes have power but need backup protection.
- Integrated security systems:Works with Ajax Hubs and extenders for monitored installations, including panic response workflows where audible alerts combine with notifications to monitoring stations and mobile users.
Comparisons with similar products on the market
When considering an outdoor wireless siren, buyers often weigh features such as sound level, communication reliability, power options and tamper protection. Here’s how the StreetSiren S DoubleDeck compares to common alternatives:
- Vs. basic battery‑only sirens:Many low‑cost wireless sirens rely solely on batteries and offer lower sound output and limited tamper detection. The StreetSiren’s higher maximum volume, accelerometer, jamming detection and optional external power offer clear advantages in reliability and functionality.
- Vs. wired sirens:Wired models may offer constant mains power but require cabling and professional installation. The Ajax siren’s wireless operation simplifies installation and relocation while still supporting external power when available, giving more flexibility with similar deterrent effect.
- Vs. other Ajax models or competitor premium sirens:Compared with other premium outdoor sirens, the DoubleDeck’s adjustable 85–113 dB range and LED frame put it on par with top offerings for visibility and volume. The use of Ajax Jeweller protocol ensures seamless integration with Ajax Hubs, which can be an advantage over third‑party sirens that require additional gateways or lack two‑way encrypted comms.
- Price/value comparison:With a suggested retail price near mid‑range levels, the StreetSiren S DoubleDeck delivers strong value considering its wireless range, battery life, tamper features and IP rating. Buyers seeking higher‑grade industrial sirens might pay more for additional ingress protection or certificated heavy‑duty housings, while budget models will fall short on many of the DoubleDeck’s protections.
Customer feedback and installer perspectives
While individual opinions vary by site and expectations, common feedback themes from installers and users of Ajax street sirens include reliability, ease of installation and the psychological deterrent effect of a bright, loud external alarm. Examples of typical comments include:
- "Installers appreciate the wireless range and encrypted two‑way link — pairing and setup through Ajax Hubs is straightforward and reliable."
- "End customers report satisfaction with the loudness and the LED frame — it not only alerts neighbours but also shows up clearly on outdoor cameras at night."
- "The hybrid power option means fewer return visits for battery swaps, and keeping batteries as backup is a useful fail‑safe when mains power is present."
Note: Always check current user reviews and ask installers for site‑specific advice. Warranty and post‑sale support vary by distributor and region, so confirm terms with your supplier or authorised Ajax partner.
Conclusion: Why choose the Ajax StreetSiren S DoubleDeck?
The Ajax StreetSiren S DoubleDeck is a well‑balanced wireless outdoor siren that blends high‑output acoustics, secure long‑range communications and practical installation features. Its adjustable volume, visual signalling through a bright LED frame, tamper and movement detection, and flexible power options make it suitable for a wide range of residential and light commercial applications. For users invested in the Ajax ecosystem, the StreetSiren integrates smoothly with Hubs and extenders to form a cohesive monitored security solution.
If you need a robust, easy‑to‑install audible deterrent with modern wireless security features and minimal maintenance demands, the StreetSiren S DoubleDeck offers a compelling mix of performance and value. For best results, have the device installed by a qualified installer or authorised Ajax partner and review local regulations regarding audible alarms and placement. Always confirm current specifications and warranty details with your supplier before purchase.
