Ashly Audio, NX4004, Ashly NX4004 Multi-Mode Power Amplifier, 4 x 400 Watts, 2/4/8 Ohms or 25V/70V
Features:
- Rear panel DIP switches select low impedance (2, 4, and 8 Ohm), constant voltage (70V or 100V), high pass filter, limiter and input gain on each channel
- Ashly Energy Management System (EMS) for increased efficiency) automatic <1Wsleep-mode (defeatable)
- Switch mode power supply automatically detects 120V or 240V AC operation
- Extensive protection circuitry
- Continuously variable cooling fans
- Front panel power switch and level controls (can be disabled for security)
- Multiple internal power supplies provide increased channel separation and reliability
- Remote DC level control on each input channel (2 RU models only)
- Genuine Neutrik connectors on 2 RU models for security, safety, and reliability
- Safety / Compliance: cTUVus, CE, FCC, RoHS
nX Multi-Mode Amplifiers feature energy-efficient Class-D switching amplifier technology combined with a switch mode power supply. All feature Selectable Outputs on each channel so you can connect to virtually any speaker: low impedance (2, 4, and 8-ohm), or constant voltage (70V or 100V).
For more information, please see 
Data Sheet
