The DBA-4150 A is a highly energy-efficient digital 100 V amplifier, developed for professional voice alarm systems (VAS) and public address applications compliant with DIN EN 50849 / VDE 0828. Featuring an efficiency rating of over 90 %, low thermal output, auto sleep mode, and reduced emergency power requirements, it is ideal for sustainable, low-maintenance installations.

Operating in either 2-channel mode (2× 300 W RMS) or 4-channel mode (4× 150 W RMS), the amplifier offers flexible power configuration. Its fanless cooling design ensures silent operation, making it especially suitable for noise-sensitive environments such as churches, offices, or conference rooms.

Status LEDs on the front panel indicate signal presence, clipping, protection, and power supply. In the absence of an input signal, the unit enters standby mode (only 10 W power draw), and reactivates in just 30 ms when needed. High-grade protection circuitry and screw terminals for both speaker outputs and balanced inputs simplify integration in professional installations.

Technical Specifications:

• Model: DBA-4150 A
• Type: Digital 100 V amplifier, 2 or 4 channels
• Output Power (Program / RMS):
• 2 × 450 W / 300 W
• 4 × 225 W / 150 W
• Output Voltage: 50 V or 100 V
• Input Sensitivity: 1 V, 10 kΩ, balanced (screw terminals)
• Frequency Range: 140 Hz – 24 kHz (–3 dB)
• Signal-to-Noise Ratio: > 91 dB
• THD: < 0.2 % at 1 kHz
• Crosstalk: 85 dB
• Protection Features:
• Short-circuit, overheating, open load
• Soft-start delay
• Sleep Mode: Yes, reactivates within 30 ms
• Standby Power: 10 W (only 0.05 A @ 230 V AC)
• Power Consumption (full signal):
• 730 W (230 V AC), 27 A (24 V DC)
• Power Supply:
• AC: 230 V, 50–60 Hz
• DC: 24 V backup
• Dimensions (W×H×D): 483 × 88 × 260 mm (2 U)
• Weight: 18.5 kg
• Standards: EN 54-16 compliant

Key Features:

• >90 % efficiency – low heat, long lifespan
• Auto sleep mode saves energy during inactivity
• Silent, fanless design – perfect for sensitive environments
• Compact depth (only 260 mm) – rack-friendly
• Recessed volume controls for secure mounting
• Optimized for low-power backup systems in PA/EVAC