

DD-4480 Four Channel Digital Power Amplifier
Key Features
High-capacity switching power amplifier
Comprehensive protection: auto-limiting, short circuit, overload, over-temperature, and power-on delay
Intelligent delay start system protects speakers from startup impact
Dual-channel balanced input on rear panel
Professional SPEAKON output connectors
Standard 483mm rack-mount design
Independent cooling systems for amplifier and power supply
Advanced stepless fan speed control
Lightweight 1U chassis for easy installation and transport
Specifications
Output Power:
8Ω/1kHz: 4×350W
4Ω/1kHz: 4×650W
Frequency Response: 20Hz-20kHz (±3dB)
THD: ≤1% (at 8Ω/350W)
Input Sensitivity: +4dB (1.23V)
Input Impedance: 10kΩ (Balanced)
S/N Ratio: ≥80dB
Connectors
Input (CH1-2): XLR balanced
Output (CH1-2): SPEAKON
Power: Standard AC input
Indicators
Power ×1 (Green)
Signal ×2 (Yellow)
Peak ×2 (Red)
Protection ×1 (Red)
Power & Environment
Voltage:
AC110-120V 50/60Hz
AC220-240V 50/60Hz (internal jumper selectable)
1/8 Power Consumption: 50W/80W/110W
Operating Temp: 0-50℃
Humidity: ≤90%RH (non-condensing)
Key Features
High-capacity switching power amplifier
Comprehensive protection: auto-limiting, short circuit, overload, over-temperature, and power-on delay
Intelligent delay start system protects speakers from startup impact
Dual-channel balanced input on rear panel
Professional SPEAKON output connectors
Standard 483mm rack-mount design
Independent cooling systems for amplifier and power supply
Advanced stepless fan speed control
Lightweight 1U chassis for easy installation and transport
Specifications
Output Power:
8Ω/1kHz: 4×350W
4Ω/1kHz: 4×650W
Frequency Response: 20Hz-20kHz (±3dB)
THD: ≤1% (at 8Ω/350W)
Input Sensitivity: +4dB (1.23V)
Input Impedance: 10kΩ (Balanced)
S/N Ratio: ≥80dB
Connectors
Input (CH1-2): XLR balanced
Output (CH1-2): SPEAKON
Power: Standard AC input
Indicators
Power ×1 (Green)
Signal ×2 (Yellow)
Peak ×2 (Red)
Protection ×1 (Red)
Power & Environment
Voltage:
AC110-120V 50/60Hz
AC220-240V 50/60Hz (internal jumper selectable)
1/8 Power Consumption: 50W/80W/110W
Operating Temp: 0-50℃
Humidity: ≤90%RH (non-condensing)