PA DM750 750W 70/100V Modular EN54 Voice-Alarm Amplifier with 48Vdc Emergency Supply

When an evacuation system has to keep talking through a fire, every rack unit and every watt counts. The Proel PA DM750 packs a full 750W of 70/100V constant-voltage power into a single slim module, so an integrator can stack up to eight amplifiers side by side in one 3U MDA8C chassis and drive large multi-zone loudspeaker networks without filling a cabinet. Switch-mode supply and transformerless electronic line output keep the weight down to just 2.15 kg, while an onboard DSP, selectable PA-HF voice filter, VOX gating and independent low/high tone shaping let you tune intelligibility for the room. Built for EN54 modular voice-alarm systems, it runs continuously on 230V mains and fails over automatically to a 48Vdc emergency battery supply, with multi-level protection, speaker short-circuit and overload safeguards and self-fault recovery keeping the line live when it matters most.

Features

• 750W of 70/100V constant-voltage output in a single slim module - stack up to 8 in one 3U MDA8C rack to power large multi-zone systems from minimal cabinet space
• Automatic fail-over to a 48Vdc emergency battery supply keeps voice-alarm audio running during a mains failure
• Transformerless switch-mode design weighs just 2.15 kg, cutting rack load versus conventional 100V amplifiers
• Onboard DSP with selectable PA-HF voice filter, VOX threshold and independent low/high tone control for clear, intelligible announcements
• Multi-level protection with speaker short-circuit and overload safeguards plus self-fault recovery for reliable continuous operation
• Balanced line input on Euroblock plus a priority mic/line input on RJ45, with front-panel master level and gain adjustment
• Energy-saving standby circuit draws just 50mA when idle