Let me bring the following quotation from the NZSA website to your attention:
“If the alarm is sounding because it has detected an intrusion, a thief will try to silence the alarm by cutting the siren wires. Battery back-up sirens are designed to sound on their own if any wires running to it are cut or disconnected.”
According to who?
Here is the reality. The photo below shows a Subaru Impreza which has simply had the siren ripped out!
The alarm was a “5 star” Top of the range Mongoose M80G. So much for protection hey!
The problem is that because the siren has an over-ride key it needs to be accessible. Forget any poor sales spin about “cutting wires” the reality is that a thief will simply rip the siren out of the engine bay!
Below is a close-up…
It’s not just Mongoose I’m having a pop at here. AVS, Uniden, Meridian are all listed as being “5 Star” alarms yet share the same weakness.
It really is about time the AS/NZS standards were updated. Given that the NZSA claim to represent the standards surely they should be asking these questions instead of me.
The bottom line is that most “5 Star” sirens offer about as much protection as a perforated condom!
Here’s a previous blog post that shows which sirens are actually effective: vehiclesecurity.co.nz/blog/battery-back-up-sirens