Valcom V-9925A Loud Warble Horn

The Telecom Spot Expert Review

The V-9925A is a standalone alerting horn that connects directly to PBX telephone station lines and activates when the line rings — producing a loud warble tone that can be heard throughout a warehouse, manufacturing floor, or large open area where a standard telephone ringer would be inaudible. The 5-watt built-in amplifier powers the integrated horn speaker to sufficient volume to cut through moderate industrial ambient noise without an external paging amplifier. Two activation voltage options — 90 Vac ring and 18 Vac buzzer — cover both ring voltage and buzzer voltage sources common on PBX and key telephone systems, making it compatible with a wide range of telephone equipment without requiring an interface adapter. The built-in volume control lets the installer set output level at the device to match the ambient noise of the installation location. At 4.7 lbs with a 6.5 in. H × 8.2 in. W × 10.4 in. D housing, it is substantial enough to produce significant acoustic output from the integrated horn driver.

Key Features

• External audible warble horn for telephone ring alerting in noisy environments
• Connects directly to PBX or station lines — no separate amplifier required
• 5-watt built-in amplifier and tone generator drive the integrated horn speaker
• Activates at 90 Vac ring voltage or 18 Vac buzzer voltage
• Built-in volume control for field-adjustable output level

Technical Specifications