Product Overview
12 VDC Multi-Tone Emergency Vehicle Siren by RSG Engineering, New Unused Surplus
Condition
New and unused. Clean, excellent condition. The photographed unit shows a molded black housing with no cracks, chips, or road grime, a foam wrap band seated around the horn body, and a wiring pigtail that ends in a white two row nylon connector with three bright terminals fitted and at least one cavity empty; the housing's total position count is not clearly legible in the photos. The rear label is intact and reads RSG Engineering Ltd., Cannock, WS11 1DB, with the number 145272 on a separate silver label above it. Mounting hardware is not included, and no mating connector, control head, or dash switch is supplied.
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Product Overview
This is a 12 VDC emergency vehicle siren built by RSG Engineering Ltd. of Cannock, England, offered here as new unused surplus. What you get is the sounder itself: a molded housing with an oval horn flare and a domed driver visible inside the mouth, compact enough to live behind a grille or under a hood. Hookup is the simple kind, red to +12VDC, black to ground, and white to a momentary ground that steps the siren through its selectable tones, so one momentary dash switch does the driving with no separate control head in the loop. On the photographed unit the pigtail exits the rear and terminates in a white two row nylon connector with three bright terminals fitted; the total position count is not clearly legible in the photos. The bundle carries at least five conductors, white, red, black, green, and blue, so there are leads beyond the three in the hookup on record. The function of the green and blue leads is not confirmed, so verify the harness against manufacturer data before permanent installation. Sound pressure level, tone count, and current draw are also not confirmed for this unit.
Key Features
- Supply: 12 VDC, sized for direct vehicle integration
- Wiring per the hookup carried on this listing: red = +12VDC, black = ground, white = momentary ground for tone change
- Tone selection by momentary ground pulse on the white lead, no separate control head required
- Photographed unit: pigtail carries at least five conductors, white, red, black, green, and blue, and ends in a white two row nylon connector with three bright terminals fitted; the green and blue lead functions and the connector's total position count are not confirmed
- Construction: molded black housing with a foam wrap band around the horn body, oval flare with a domed driver inside
- Rear labels: RSG Engineering Ltd., Cannock, WS11 1DB, England, plus the number 145272
- Not included: mounting hardware, mating connector, control head, dash switch
- Sound pressure level, tone count, and current draw: not confirmed, verify against manufacturer data before use
Applications
- Fleet technician retrofitting a warning sounder onto a utility, tow, or service truck that shipped without one
- Agency or volunteer department shop replacing a tired sounder in an existing 12 volt warning package, where local rules allow
- Security or facilities integrator building a yard, gate, or machine alert that has to carry over engine noise
- Film, event, or prop vehicle builder who needs a genuine siren sounder running off a 12 volt bench supply
Frequently Asked Questions
How do I change tones on this siren?
Per the hookup this listing carries, the white lead switches the tone when it is momentarily grounded, so a plain momentary dash switch cycles the patterns. The exact number of tones in the sequence is not confirmed for this unit, so put it on a bench supply and step through it before you commit to a dash layout.
What is on the wiring pigtail, and is a mating connector included?
The hookup on record is three wire: red to +12VDC, black to ground, white to momentary ground for tone change. On the photographed unit the pigtail carries at least five conductors, white, red, black, green, and blue, and ends in a white two row nylon connector with three bright terminals fitted; the total position count is not clearly legible in the photos. The green and blue lead functions are not confirmed, so verify against manufacturer data before you wire it into a vehicle. No mating connector, switch, or loom is supplied.
Does it come with mounting hardware?
No. This is the sounder only. The rear of the housing carries molded slots and bosses that look intended for a bracket, but no brackets, screws, or grommets ship with it, so plan your own mount.
How loud is it, and what does it draw?
Not confirmed. We do not publish a decibel figure or a current rating for this unit and we will not guess at one. Treat it as a vehicle grade horn sounder, verify the ratings against manufacturer data, and size the fuse and switch conservatively for your install.
Why buy this siren instead of bidding on a lot of surplus emergency gear?
Because you know exactly what lands on your bench. These are new unused RSG sounders out of one surplus lot, shot from four angles, with the wire colors and the labels written down before you spend a dollar. The photos show a representative unit, so the 145272 label and the exact pigtail dress on the one you receive may differ in detail. Auction lots of pulled emergency equipment arrive mixed, road worn, and usually short the one piece you actually needed. Buy a single module here and it clears our $28 free shipping line on its own, so there is nothing to pad the order with, and orders leave our Idaho warehouse the same or next business day.
Built in Cannock for vehicles whose whole job is to be heard the first time, then set on a shelf instead of a light bar. Wire it up, pick your tone, and give it the run it never got.
