Alpha AP-4 Adapter Plate, 4" or Less Hole

Add reliable audio monitoring to your entry or intercom installation with the Alpha Communications AP-4 Adapter Plate. Designed for holes 4" or less, this compact intercom & entry accessory provides instant audio output via RCA for DVR/VCR integration and surveillance recording. The AP-4 includes a built-in 3" speaker for live audio or playback monitoring and a 3.5 mm headphone jack for private listening — ideal for reception desks, security stations, and multi-tenant entry panels.

Lighted zone and playback/mute buttons make control intuitive in dimly lit corridors, while the dedicated mute switch ensures privacy and prevents unwanted audio at the unit speaker. Mounting into existing openings is fast and cost-effective, letting technicians upgrade systems without major modifications. Engineered by Alpha Communications, the AP-4 is a practical choice for security professionals who need dependable audio monitoring, DVR compatibility, and easy user control in one adapter plate.

Upgrade your surveillance and entry systems today — order the AP-4 to streamline audio monitoring and improve on-site security operations.

• Simple retrofit for openings 4" or less — speeds installation and fits standard intercom cutouts
• RCA audio output for seamless DVR/VCR and surveillance system integration
• Built-in 3" speaker plus 3.5 mm headphone jack for flexible on-site monitoring or private listening
• Illuminated zone and playback/mute buttons for easy operation in low-light entryways
• Mute switch provides privacy control to silence the unit speaker when needed
• US-made reliability from Alpha Communications, designed for commercial security and entry systems