The Grandstream GSC3518HS SIP Horn Speaker is a high-power outdoor SIP/Multicast talk-back horn speaker designed for large-area public address, emergency alerts, and two-way voice communication in demanding environments such as campuses, industrial sites, parks, warehouses, and transportation…
£230.00
Available on back-order
The Grandstream GSC3518HS SIP Horn Speaker is a high-power outdoor SIP/Multicast talk-back horn speaker designed for large-area public address, emergency alerts, and two-way voice communication in demanding environments such as campuses, industrial sites, parks, warehouses, and transportation hubs. It delivers extremely loud HD audio output (up to 50W / ~126 dBA) with integrated microphones for interactive communication.
Unlike standard paging speakers, the GSC3518HS is built for long-range sound projection and full SIP integration, allowing it to function as both a broadcast horn and a talk-back intercom device in IP-based communication systems.
The GSC3518HS is designed for maximum coverage and clarity in noisy outdoor environments, making it suitable where normal speakers would be insufficient.
Its 50W high-fidelity horn speaker delivers very high sound pressure levels for long-distance audio projection, while built-in microphones with AI noise reduction allow two-way communication and voice response.
With SIP and multicast support, it integrates easily into VoIP and unified communication systems, enabling scheduled announcements, live paging, and emergency broadcast overrides.
Next Day Delivery
For UK orders received before 1pm Monday to Friday, we operate a next business day delivery service, subject to availability. We use next day services from the leading delivery companies.
Specific Time Delivery
If you need an item urgently, or delivered at a specific time, please contact us.
Delivery Methods
We use several leading delivery companies. The majority of our deliveries are made by DPD, including most international orders.
Shipping prices are calculated during the checkout process. We deliver to almost every country. For international delivery services, we use DHL, a high quality, fast delivery service. Prices are provided based on the weight of the order; this is calculated when you reach the checkout.
For full shipping information please visit our shipping page.
The Grandstream GSC3518HS SIP Horn Speaker is a high-power outdoor SIP/Multicast talk-back horn speaker designed for large-area public address, emergency alerts, and two-way voice communication in demanding environments such as campuses, industrial sites, parks, warehouses, and transportation hubs. It delivers extremely loud HD audio output (up to 50W / ~126 dBA) with integrated microphones for interactive communication.
Unlike standard paging speakers, the GSC3518HS is built for long-range sound projection and full SIP integration, allowing it to function as both a broadcast horn and a talk-back intercom device in IP-based communication systems.
The GSC3518HS is designed for maximum coverage and clarity in noisy outdoor environments, making it suitable where normal speakers would be insufficient.
Its 50W high-fidelity horn speaker delivers very high sound pressure levels for long-distance audio projection, while built-in microphones with AI noise reduction allow two-way communication and voice response.
With SIP and multicast support, it integrates easily into VoIP and unified communication systems, enabling scheduled announcements, live paging, and emergency broadcast overrides.