Intercom · Outdoor Horn

Grandstream GSC3518HS

Name: Grandstream GSC3518HS
Brand: Grandstream
Availability: InStock

50W IP66 Outdoor Horn Speaker with Talk-Back

The Grandstream GSC3518HS is a SIP and multicast talk-back horn speaker that provides crystal clear HD audio through a high-fidelity 50-Watt speaker with IP66-rated water and dust protection. Built for outdoor campuses, public spaces, large offices, school playgrounds, hospitals, car parks and industrial sites, it delivers announcements and emergency notification over long distances while supporting two-way talk-back for intercom communication.

50W Horn Speaker

Long-throw output

IP66 Rated

Water and dust protected

Talk-Back Capable

Two-way communication

SIP & Multicast

Site-wide paging

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Technical Features

Announcements That Reach the Far End of the Site

The GSC3518HS is designed for open outdoor areas where an indoor ceiling speaker would never be heard.

High-Fidelity 50W Horn Speaker

A 50-Watt horn design projects announcements across playgrounds, car parks, yards and campuses

IP66 Water and Dust Protection

IP66 rating means the speaker withstands rain, dust and harsh outdoor conditions year-round

Talk-Back Functionality

Two-way talk-back allows staff to hold a conversation as well as broadcast announcements

Crystal-Clear HD Audio

HD audio reproduction keeps emergency and routine announcements intelligible outdoors

SIP and Multicast Paging

Network Powered

Power over Ethernet keeps outdoor installations to a single cable run per speaker

Emergency Notification

Ideal for mass notification and emergency alerting across large outdoor and industrial areas

Free GDMS Management

Provision, monitor and maintain outdoor speakers centrally through GDMS

Frequently Asked Questions

Grandstream GSC3518HS — Common Questions

Everything you need to know about the Grandstream GSC3518HS before you buy.

What is the Grandstream GSC3518HS?

The GSC3518HS is a SIP and multicast talk-back horn speaker that provides crystal clear HD audio with a high-fidelity 50-Watt speaker and IP66-rated water and dust protection.

Where is the GSC3518HS typically installed?

It is designed for outdoor campuses, public spaces, large offices, school playgrounds, hospitals, car parks, warehouses and industrial sites where announcements need to carry over long distances.

Is the GSC3518HS weatherproof?

Yes. It carries an IP66 rating for water and dust protection, so it is suitable for permanent outdoor installation in demanding conditions.

Does the GSC3518HS support two-way communication?

Yes. It is a talk-back horn speaker, so in addition to broadcasting announcements it supports two-way voice communication for intercom use.

How does the GSC3518HS compare with the indoor GSC speakers?

The indoor GSC3505, GSC3506, GSC3510 and GSC3516 use cabinet-style speakers rated from 8W to 30W. The GSC3518HS uses a 50W horn design with IP66 weatherproofing specifically for outdoor long-throw coverage.

How do I buy the Grandstream GSC3518HS in India?

Cohesive Technologies is an authorised Grandstream distributor for India, Sri Lanka, Nepal and the Maldives. Contact our team for GSC3518HS pricing, stock availability, demo units and pre-sales design support, and we will connect you with your nearest authorised partner.