Nexo NANONXAMP4 4 Channel Amplifier

nanoNXAMP4 Digital Powered Controller

The nanoNXAMP4 is a compact and energy-efficient all-in-one solution for amplification and signal processing. It significantly reduces system costs and is ideally suited for applications in retail, hospitality, places of worship, and corporate environments – without compromising sound quality.

The nanoNXAMP4 4-channel amplifier delivers 4 x 250 watts via highly reliable Class-D power amplifiers with extremely low distortion and a switched-mode power supply (SMPS) with active power factor correction (PFC). This gives it the same sound quality and characteristic sonic signature as NEXO's larger NXAMPMK2 TD controllers.

The integrated signal processing uses FIR filters for precise system equalization and linear phase compatibility. Pre-configured presets are available for targeted selection of loudspeakers from NEXO's popular ID and ePS series.

An integrated mixer and matrix functions further reduce costs for smaller installations. Setup and remote control are conveniently performed via an integrated web interface, accessible via Ethernet or built-in Wi-Fi.

Key features

• Speaker controller with integrated 4-channel power amplifier in only 1U, half rack width
• Four analog inputs (balanced + unbalanced), line or microphone level, as well as SPDIF digital input and output
• Four Class-D amplifier channels with extremely low distortion and pristine sound quality – 4 x 250 watts at 4 ohms
• Universal power supply (100–240 V) with PFC technology for maximum efficiency and consistent power consumption
• Remote control via integrated WLAN access point or via Ethernet connection

Flexible, scalable and economical

The nanoNXAMP4 4-channel amplifier is available in both standard and Dante versions. It combines power and signal processing in a single device, significantly reducing the overall cost of small to medium-sized sound reinforcement systems. Perfectly matched to loudspeakers in the NEXO ID and ePS series.

Typical NEXO sound in a compact form

Despite its small size, the nanoNXAMP4 delivers first-class audio quality with 4 x 250 watts of Class-D amplification and minimal distortion. Integrated FIR filtering ensures precise equalizer settings and phase-accurate reproduction. A selection of pre-configured presets guarantees optimal performance for compatible NEXO speaker models.

Highly customizable and intuitively controllable

Thanks to the integrated mixer and matrix functions, even smaller installations can be implemented without additional hardware. Optional wall-mounted control panels allow for easy source selection and volume control directly on site.

Easy setup via web interface

System configuration and remote control are conveniently performed via an integrated, browser-based user interface accessible via Ethernet or Wi-Fi. Inputs, zones, routing, speaker presets, delays, and system information, among other things, can be managed intuitively here.

Compatible with external control solutions

The nanoNXAMP4 can be easily integrated into existing networks and supports both NEXO's own NeMo control system and common third-party protocols for remote control and system monitoring.

Space-saving design

With a footprint of just one rack unit and half the rack width, the nanoNXAMP4 maximizes channel density and saves valuable rack space. The integrated 4x In / 4x Out DSP architecture with optional Dante interface eliminates the need for additional signal processors – reducing not only hardware costs but also cabling effort.

Technical data

Performance specifications:

• Number of channels: 4 amplifier channels, bridgeable in pairs (2 x 2)
• Maximum output power (4-channel mode / 8 ohms): 4 x 200 watts
• Maximum output power (4-channel mode / 4 ohms): 4 x 250 watts
• Maximum output power (4-channel mode / 2 ohms): 2 x 250 watts
• Maximum output power (2-channel bridged mode / 8 ohms): 2 x 200 watts
• Maximum output power (2-channel bridged mode / 4 ohms): 2 x 350 watts
• Power consumption (idle): 20 watts
• Power consumption (standby): < 2 watts
• Power consumption (standby without network connection): < 0.5 watts

Signal-to-output specifications:

• Frequency response: +0/-0.25 dB from 20 Hz to 20 kHz
• Input impedance / Input sensitivity: 20 kOhm / +13 dBU
• Dynamic range / Total harmonic distortion (THD+N): > 106 dB (A-weighted) / < 0.05% (at flat setting)
• Latency: 1 ms (at flat setting)
• A/D and D/A converters: 24 bit @ 48 kHz
• Signal processing: 64-bit DSPs

Rear connections:

• Analog audio inputs: 4 balanced inputs (Euroblock 3.5 mm pitch) or unbalanced (Cinch/RCA)
• Speaker outputs: 4 outputs (Euroblock 5 mm pitch)
• Digital audio input/output: 1 x SPDIF 2-channel input/output (RCA)
• GPIO port: 1 x Euroblock 3.5 mm with 4 global inputs and 1 global output
• Network interface: 1 x Ethernet port (100 Mbit/s) for remote control
• Power connection: 1 x IEC C14 connector
• Front panel and remote control
• Front LEDs: 5 LEDs (WiFi / Network / Output / Input / Status)
• Remote control: Via integrated WiFi access point or Ethernet port (client/access point mode)

Power supply:

• Mains voltage: Universal power supply with active PFC, 100–240 V (50/60 Hz)
• Power consumption at 1/8 maximum load (4 ohms): 250 watts

Dimensions and certifications:

• Dimensions and weight: 1U, 1/2 19' rack, 44.5 x 220 x 296 mm (H x W x D), 2.8 kg
• Electrical safety certification: IEC62368-1 (2nd edition) & UL62368-1
• EMC certification: FCC Part 15 Class B, CAN/CSA-CISPR 22-10, EN55032/CISPR32, EN61000