Horn/Strobe/Speaker Damage Sto...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$24.46
Horn/Strobe/Speaker Damage Stopper® – Large Flush & Surface Mount, White

Horn/Strobe/Speaker Damage Stopper® – Large Flush & Surface Mount, White

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Model: STI-9711

In Stock (leaves warehouse same day if ordered before 3pm ET)

$24.46
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Horn/Strobe/Speaker Damage Stopper® – Large Flush & Surface Mount, White

The Horn/Strobe/Speaker Damage Stopper® (Large Size) delivers heavy-duty protection for larger SPECTRAlert® Advance series horn/strobe/speaker devices. Crafted from rugged 9-gauge coated steel wire, these guards safeguard critical notification appliances from vandalism, impact, and accidental damage while ensuring full visibility and operation. Designed for quick installation, each model comes with mounting clamps and hardware. Available in flush or surface mount configurations, both sizes are UL/cUL listed and ideal for high-traffic or vulnerable locations.

Key Features

  • Protects larger SPECTRAlert® Advance horn/strobe/speaker devices
  • Tough 9-gauge coated steel wire
  • Flush or surface mount options
  • White finish to match most installations
  • Includes mounting clamps and hardware
  • UL/cUL listed
  • Larger size:
    • Flush Mount: 8.26" H x 8.26" W x 3.54" D
    • Surface Mount: 8.55" H x 8.55" W x 6.23" D

Manufacturer Resources

VIEW SPEC SHEET

Product Specs

Compatible Devices:
System Sensor SpectrAlert® Advance and SP Series
Environment:
Indoor Use Only
Installation:
Includes Screws, Anchors, and Clamps
Product Line:
STI Horn Strobe Speaker Damage Stoppers
Tamper Resistance:
Designed to Withstand Vandalism and Impact
Warranty:
Three-Year Guarantee Against Breakage (Normal Use)
Application:
Protects Horns, Strobes, and Speakers in Indoor Environments
Certifications:
UL Listed
Compatible Model:
System Sensor SpectrAlert® Advance and SP Series
Compatible Models:
System Sensor SpectrAlert® Advance and SP Series
Product Group:
Safety
Product Subgroup:
Stopper Devices
Product Type:
Horn/Strobe/Speaker Damage Stopper® – Large Flush & Surface Mount, White
Department:
Safety
Product Color:
White
Installation Options:
Flush Mount, Surface Mount
Product Material:
9-Gauge Steel Wire with Red/White Polyester Coating

Parts & Accessories

    Safety Technology International STI-9711 – Frequently Asked Questions

    1) What is the difference between the flush mount and surface mount Horn/Strobe/Speaker Damage Stopper?
    Depth is the deciding factor. The flush mount guard measures 8.26 x 8.26 x 3.54 inches and suits an appliance mounted to a recessed back box sitting flat against the wall. The surface mount guard measures 8.55 x 8.55 x 6.23 inches, with the extra depth to clear an appliance sitting on top of a surface back box. Pick by how the notification appliance is mounted, not by the appliance model, since both cover the same device families.
    2) Can STI Damage Stoppers be installed outdoors or in a parking garage?
    No. The large Horn/Strobe/Speaker Damage Stopper is rated for indoor use only. For an exterior notification appliance or an open garage deck you need a guard built for outdoor exposure, not this one.
    3) Is the STI Horn/Strobe/Speaker Damage Stopper UL listed for use over a fire alarm notification appliance?
    The large Damage Stopper is UL Listed. That matters on a fire alarm job because an AHJ will ask whether anything placed over a notification appliance has been evaluated with it rather than field-fabricated.
    4) What size STI Damage Stopper do I need for a large SpectrAlert Advance speaker strobe?
    The large size is the one for bigger SpectrAlert Advance horn/strobe/speaker appliances, in either an 8.26 inch square flush version or an 8.55 inch square surface version. The smaller Damage Stoppers in the same line are sized for compact horns and strobes, so if your appliance is one of the larger speaker/strobe combinations, go large rather than trying to make a small guard clear the housing.
    5) Do I need to buy mounting hardware separately for an STI horn strobe wire guard?
    No extra hardware order is needed. Each large Damage Stopper ships with screws, anchors and mounting clamps, so a maintenance tech can go from box to installed guard in one trip. What is not included is any back box or the notification appliance itself.
    6) How tough is the wire on an STI Damage Stopper in a gym or school corridor?
    The cage is 9-gauge steel wire with a polyester coating, built to take vandalism and impact. That is the reason these go up in gymnasiums, corridors, day rooms and loading areas where a ball, a cart or a deliberate kick would otherwise crack an appliance lens. The coating also keeps the guard from scuffing the wall finish behind it.
    7) Will a white wire guard over a fire alarm strobe look out of place on a painted wall?
    The large Damage Stopper is finished in white, which is what most SpectrAlert appliances and most corridor walls already are, so it reads as part of the device rather than an add-on cage. For a property manager standardizing across a building, ordering all white keeps every protected appliance looking the same.
    8) Can I add a backplate behind an STI Damage Stopper?
    Yes, backplates are available for certain Damage Stopper models: the STI-1285 backplate suits the STI-9705 and STI-9708, and the STI-1286 backplate suits the STI-9711 and STI-9714. A backplate is what you use when the guard is going on a surface where you want a solid mounting face behind the cage instead of fastening straight to the wall material.
    How fast can I get the Safety Technology International STI-9711 delivered?
    Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
    Can I return it if it doesn’t work for me?
    Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
    Does the Safety Technology International STI-9711 come with a warranty?
    Absolutely. The Safety Technology International STI-9711 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
    How do I get technical support or installation help for the Safety Technology International STI-9711?
    You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
    Why buy the Safety Technology International STI-9711 from ZenSupply?
    ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support, and rewards on every order. Our team is always ready to help you choose the right product for your project.
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