Nexo NXAMP4X4 Powered TDController

NXAMP 4X4 is an ultra-flexible, true four-channel digital processing and amplification system delivering an integrated solution for any NEXO speaker configuration.

Nexo NXAMP4X4 Powered TDController

NXAMP technology is far more sophisticated than simply a bundled power amplifier and loudspeaker controller. The application of advanced DSP allows multiple digital sense lines to protect simultaneously the amplifier and the connected speakers.

The NXAMP 4x4 uses a unique dual mains cord, feeding the power supplies with almost twice the power of that in a conventional amplifier design, while being extremely easy to connect to any single or multi-phase mains supply. To absorb this enormous current, the NXAMP4x4 uses four independent, high-power, full resonant power supplies working in opposite phase to cancel noise and lower EMC.

Yamaha EEEngine technology delivers maximum efficiency in drive performance and power, with the sonic purity of conventional class AB amplifiers, and heat dissipation equivalent to class D. Dual-core DSPs take care of amplifier protection and optimisation, while raising the processing standard of NEXO proprietary loudspeaker management technology to higher levels of sonic performance and reliability.

Additional features include full computerless front-panel operation and on-the-fly independent loudspeaker per output selection or load monitoring through GPIO or EthersoundTM.

Key Features

  • New dual-voltage version
  • Optional DanteTM and EtherSoundTM network cards
  • New Firmware LOAD 3.0
  • Set up selection per channel
  • Linear phase on all set-ups
  • All systems compatible 20Hz-20kHz


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
Input To Power Out Specifications
Frequency response +0.5 dB from 10 Hz to 20 KHz
Input impedance / Max. level 20 K / +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
Back Pane L Features
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
User Interface And Controls
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.
Dimension S And Certifications
Dimensions 4U 19" Rack - 457 mm (18") Depth
Weight 24.5 Kg (49 lbs) net
EMC Certification CE, FCC
Green status Compliant with ROHS directive
Electrical Safety Certification cULus,  CB (CE)
Ordering Information
NXAMP4x4 (for 110/120 V mains) NX.AMP4x4U (1 x NXAMP4x4U  1 x Quick Start,  2 x US power cords)
NXAMP4x4 (for 220/240 V mains) NX.AMP4x4C (1 x NXAMP4x4C  1 x Quick Start,  2 x CH power cords)
NXAMP4x4 (dual voltage mains) NX.AMP4x4W (1 x NXAMP4x4W  1 x Quick Start)
NXAMP4x4 handles kit NX.AMP4x4-HAND (2 x NXAMP4x4 handles w screws)
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