The Dynacord DPA 4120 is a single-channel, 3-RU commercial power amplifier engineered for continuous operation in permanent sound reinforcement installations. Part of Dynacord's Promatrix series, it is custom-built for paging, emergency alert networks, and distributed background music systems

Key Technical Specifications

• Power Output: Delivers 1x200 Watts RMS of output power (its larger sibling, the DPA 4140, provides 400W). 
• Output Configuration: Equipped with an internal output transformer to drive balanced, floating high-impedance speaker lines (100V, 70V, or 50V) as well as a low-impedance 4-ohm line. 
• Dual Power Modes: Supports normal 115V/230V AC mains operation alongside a 24V DC emergency backup power input. An internal relay handles seamless automatic switching to battery power in an outage. 
• Monitoring & Safety Compliance: Fully compliant with EN 60849 / VDE 0828 safety standards for voice alarm applications. It supports pilot tone monitoring, thermal overload protection, and ground fault surveillance on connected loudspeaker lines. 
• Modular Interface: The rear panel accommodates swappable input modules, allowing for standard balanced inputs (via the NRS 90225 module) or advanced remote modules integrated directly into a Promatrix control matrix.