Nexo NXAMP4X4 Amplifier

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Nexo NXAMP4X4 Amplifier


NXAMP is far more complex than a bundled power amplifier and loudspeaker controller. Significant DSP innovations allows multiple digital sense lines to protect at the same time the amplifier and the connected speakers. First the NXAMP4x4 uses a unique dual mains cord, feeding the power supplies with nearly twice the power than most audio amplifiers today, still being extremely easy to connect to any mono or multiple phases mains. To absorb this enormous quantity of current the NXAMP4x4 reveals four independant high power full resonant power supplies working in opposite phase, thus cancelling noise and lowering EMC.

NXAMP4x4 uses advanced custom components based power amplifier design, the ultimate evolution of the Yamaha’s EEEngine technology, offering the sonic purity of conventional class AB but a heat dissipation equaling the class D. Not only the two dual-core DSPs are taking care of the amplifier protection and optimization, but they also redefine the processing standard of NEXO proprietatry loudspeaker management technology to a higher sonic performance and reliability level.

With useful features such as full computerless front panel operation, on the fly independant louspeaker per output selection or load monitoring trough GPIO or Ethersound/AES/EBU/Dante network for safety installation, the NXAMP4x4 is ideal for a wide variety of demanding applications.



  • Ultra flexible true four channels digital processing and amplification solution offering a perfect match to any NEXO speakers
  • Among the industry’s most powerful four channels amplifiers
  • Cost effective integration of command, control, protection and amplification of all NEXO speakers systems
  • Lighter and requires less rack space than conventional amplifier-processor systems
  • Eliminates unnecessary A/D conversion
  • Optional Dante, EtherSound or AES/EBU network cards



Number of channels 4x amplifiers channels, 2 by 2 bridgeable
Max. output voltage (no load) 4x 200 Volts
Max. output power (4 channels mode /8 Ohms load per channel) 4x 1900 Watts
Max. output power (4 channels mode /4 Ohms load per channel) 4x 3300 Watts
Max. output power (4 channels mode /2 Ohms load per channel) 4x 4000 Watts
Max. output power (2 channels mode /8 Ohms load per channel) 2x 6800 Watts
Max. output power (2 channels mode /4 Ohms load per channel) 2x 8000 Watts
Power consumption (Standby) 20 Watts
Power consumption (Idle) 120 Watts
Frequency response 0.5 dB from 10 Hz to 20 KHz
Input impedance / Max. level 20 KΩ / 28 dBU
Dynamic range / TDH N 105 dB unweighted / Typical 0.1% on a flat setup
Latency 500 us on a flat setup
A to D Converters Audio and current/voltage sense lines : 24 bits @ 48 KHz
Processing Two dual-core 24 bits fixed point DSP with 56 bits accumulator



Analog audio inputs 4x balanced analogue inputs on XLR3 with a second XLR3 for link
Power outputs 4x Neutrik Speakon NL-4 outputs
RS232 port 1x DB-9 connector for firmware upgrade and accessories connection
GPIO port 1x DB-25 connector with 5x Global Purpose Inputs and 8x Global Purpose Outputs
Expansion slot For networking audio cards, 4x digital audio inputs and remote control
Mains sockets 2x Neutrik Powercon NAC3 (2x 16 A) or NAC3-HC (2x 32 A) depending on model
Front panel buttons and knobs On/Off Mains switch, Select Wheel, 2x Menus buttons, 4x Select and 4x Mute buttons
Display 40 characters by 2 lines LCD display with LED backlight
Global status display Power, Standby and Amp Protect LEDs
Speakers/Amp status display Per channel, output current sensing, speaker protection and channel soft clip
Dimensions 4U 19″ Rack – 457 mm (18″) Depth
Weight 24.5 Kg (49 lbs) net
Electrical Safety Certification cULus, CB (CE)
EMC Certification CE, FCC
Green status Compliant with ROHS directive

Additional information

Weight 16.5 kg