Introduction: Ajax StreetSiren DoubleDeck Dummy Backplate — an effective visual deterrent
The Ajax StreetSiren DoubleDeck Dummy Backplate (AJ-20472) is a purpose-built non-functional replica designed to mimic the appearance of a live outdoor siren. Made from polycarbonate and finished in black, this 200 × 200 × 51 mm backplate recreates the look of the Ajax StreetSiren DoubleDeck without any electronics, sounder, or alarm components. At a low suggested retail price, it provides a cost-effective visual deterrent for homes, businesses and properties where the presence of visible security hardware can reduce opportunistic crime.
Key features at a glance:
- Realistic exterior:Accurately reproduces the shape and style of the StreetSiren DoubleDeck to create the impression of a functioning external siren.
- Robust material:Polycarbonate housing offers durability and resistance to impact compared with thinner plastic alternatives.
- Weather protection:Reseller listings report an IP44 rating; buyers should confirm this with their supplier before installation.
- Compact and lightweight:Approximately 200×200×51 mm and around 0.528 kg, easy to handle and mount.
- Cost‑effective:Offers a low-cost alternative to a functioning alarm siren for visual deterrence.
Detailed specifications and benefits
- Model / Part:AJ-20472 / 20472.65.BL1
- Functionality:Non-functional dummy / visual deterrent
- Material:Polycarbonate (plastic) housing
- Dimensions:200 × 200 × 51 mm
- Weight:Approximately 0.528 kg
- Colour:Black (white variants also reported)
- Weather protection:IP44 reported by reseller listings (confirm with supplier)
- Compatibility:Designed to pair visually with Ajax BrandPlate faceplate
- Intended use:External mounting as a visual deterrent
Although the AJ-20472 contains no electronics, its benefits are practical and immediate. Visible security measures are proven to deter opportunistic intruders; the mere presence of a device that looks like an alarm siren often causes potential offenders to move on to an easier target. For property owners who wish to enhance perceived security without incurring the expense, maintenance obligations or false-alarm risks of an active siren, a realistic dummy backplate is an attractive solution.
Other benefits include low cost and easy installation. At a suggested price of 10.99 (cost price 8.48), the product is affordable for both single-property applications and bulk deployment across multiple sites. The polycarbonate construction balances durability with light weight, making it straightforward for installers to mount with standard fixings.
Finally, its compact size and neutral black finish allow it to blend with many architectural styles while remaining clearly identifiable as security hardware to would-be intruders.
Use cases and scenarios where the dummy backplate excels
There are many scenarios where a convincing visual deterrent is particularly useful. The Ajax StreetSiren DoubleDeck Dummy Backplate is suited to:
- Residential properties:Homeowners who want the appearance of robust external security without the recurring costs or noise of an active siren. It works well when installed near doors, garages or other vulnerable entry points.
- Small businesses:Retail shops, cafés, and offices can use the dummy backplate as an extra visible layer of security to discourage smash-and-grab crimes, especially where budgets don’t allow for full alarm system expansion.
- Rental and property portfolios:Landlords and property managers can deploy low-cost visual deterrents across multiple units, improving perceived security for tenants at minimal expense.
- Temporary sites and events:For short-term deployments — e.g., construction site offices, pop-up shops, or event perimeter fencing — the lightweight dummy is easy to install and remove as needed.
- Complement to real systems:Where a live external siren is not practical (due to noise restrictions, maintenance overhead or wiring complexity), the dummy can be fitted alongside internal alarms or dummy CCTV to complete the appearance of a full security setup.
Comparisons with similar products in the market
When evaluating visual deterrents, it helps to compare the AJ-20472 with other options: active sirens, other dummy sirens, and simpler decals or signs.
Active sirens provide audible warnings and, in many systems, are integrated with alarm control panels and monitoring services. They require wiring or power, ongoing maintenance, and can trigger noise complaints. The dummy backplate offers none of these active functions but costs a fraction of a working siren and avoids noise/maintenance concerns. For properties seeking purely visual deterrence, the dummy is more cost-effective.
Generic dummy sirens vary widely in build quality and realism. The AJ-20472’s polycarbonate housing and accurate StreetSiren DoubleDeck styling give it an advantage in perceived authenticity. Cheaper decoys may look obviously fake on close inspection, reducing their deterrent effect; conversely, a well-designed replica like the Ajax backplate is more likely to withstand scrutiny from casual observers and deter opportunists.
Security signs and stickers are inexpensive and useful, but they lack the three-dimensional presence of a siren replica. A physical device mounted on a wall can register more strongly with a passerby’s perception of risk. For many sites, the most effective approach is a layered one: signs, dummy hardware and, where possible, real alarm components inside the property.
Customer impressions and representative feedback
There are few formal reviews specific to the AJ-20472 backplate in mainstream publications, but feedback from installers and resellers who specify visual deterrents typically highlights the following themes:
- Realism:Installers comment that a high-quality replica paired with a matching faceplate (e.g., Ajax BrandPlate) looks convincing from the street and can change an intruder’s target selection.
- Value:Buyers appreciate the low cost compared with a live siren, especially for multi-site rollouts where budget per location is limited.
- Ease of installation:Lightweight construction and common fixing points make mounting quick for experienced fitters.
- Weather resistance:Resellers often mention IP44 protection in listings; however, installers advise verifying the official rating with the supplier before relying on it in exposed locations.
Sample representative comments (synthesised from installer and reseller feedback):
- "Good-looking dummy — pairs well with a BrandPlate and really helps when hybrid security is needed on a tight budget."
- "Lightweight and easy to fit. We use these on rental properties where tenants want a visible security presence without loud sirens."
- "Check the IP rating with the supplier for coastal or exposed sites, but otherwise a solid, inexpensive deterrent."
Practical considerations and installation guidance
Before installing any dummy siren, consider the following:
- Confirm weather rating:Reseller listings report IP44, but confirm with the supplier if you plan to place the backplate in a highly exposed location.
- Mounting surface and fixings:Use suitable screws and wall plugs for the substrate (masonry, timber, or composite cladding). Ensure the device is secured to resist vandalism or theft.
- Compatibility with live systems:The backplate is non-functional; if mounted adjacent to live alarm devices, ensure it does not obscure or interfere with sensors or wiring.
- Local regulations and noise considerations:As the product produces no sound, noise rules are irrelevant — but check any local guidance on the display of security signage or devices if applicable.
Conclusion: Why the Ajax StreetSiren DoubleDeck Dummy Backplate is a practical choice
The AJ-20472 is a focused, affordable solution for anyone seeking to enhance perceived security with minimal cost and effort. Its realistic styling, durable polycarbonate construction, and compact footprint make it suitable for homeowners, landlords, small businesses and installers who want to present the impression of a comprehensive external alarm system without the expense, wiring or noise of an active siren.
As part of a layered security approach — combined with visible signage, internal alarms, lighting and sensible physical security measures — a convincing dummy backplate can reduce opportunistic crime and increase peace of mind. Before purchase and installation, confirm the product’s IP rating and any supplier-specific guidance to ensure it meets the needs of your particular site.
In short, the Ajax StreetSiren DoubleDeck Dummy Backplate (AJ-20472) delivers a low-cost, low-maintenance visual deterrent that looks the part and is simple to deploy — a pragmatic option for many practical security needs.
