Grandstream Networks GSC3516 Loudspeaker 2-way White Wired Wireless 15 W

The Grandstream Networks GSC3516 is a SIP/Multicast two-way talk-back loudspeaker designed for intercom and public-address applications. It provides 15 W RMS output, supports wired and wireless connectivity, and covers a frequency range of 110–20000 Hz with 90 dB sensitivity. The unit incorporates three directional microphones with MMAD technology plus one omnidirectional microphone with an approximate 4.2 m pickup distance for clear two-way voice communication.

Advantages

The GSC3516 combines two-way SIP/Multicast communication with a 15 W HD speaker to support clear voice announcements and conversations. Multiple onboard microphones (three directional with MMAD and one omnidirectional) improve voice pickup and reduce background noise, while wired and wireless connectivity options allow flexible installation. The compact white enclosure and light weight facilitate mounting in a variety of indoor environments.

Suitable for

• Intercom systems in offices and residential buildings
• Small to medium-sized public-address and paging applications
• Conference rooms and meeting spaces requiring two-way audio
• Areas where flexible wired or wireless installation is needed

Key specifications

• Model: Grandstream GSC3516
• Output power: 15 W RMS
• Connectivity: Wired & Wireless (SIP/Multicast)
• Frequency range: 110–20000 Hz
• Sensitivity: 90 dB
• Microphones: 3 directional (MMAD) + 1 omnidirectional (≈4.2 m pickup)
• Colour: White
• Weight: 0.92 kg
• MPN: GSC3516
• EAN: 6947273704287

How to use

Mount the GSC3516 in a suitable indoor location and connect it to power and the network according to the installation manual. Configure SIP or multicast settings on the device web interface or through your VoIP management system to enable two-way talk-back and paging. Position the unit so the microphones face the area where speech will occur and verify audio levels using test calls or local announcements.

Recommendations

For best voice pickup and minimal background noise, install the speaker at head height or slightly above and avoid placing it near continuous noise sources. Use the device’s web interface to fine-tune sensitivity and network settings for reliable SIP/Multicast performance.