Nx Audio Rx 4000 Circuit Diagram Jun 2026

What is the amplifier showing? (e.g., Protect light stays on, no sound, distorted audio)

| Specification | Details | | :--- | :--- | | | RX 4000 | | Circuit Topology | Class AB | | RMS Power (2Ω Stereo) | 2 x 1550 Watts | | RMS Power (4Ω Stereo) | 2 x 950 Watts | | RMS Power (8Ω Stereo) | 2 x 600 Watts | | RMS Power (4Ω Bridge) | 3100 Watts | | RMS Power (8Ω Bridge) | 1900 Watts | | Frequency Response | 20 Hz - 20 kHz (±0.5 dB) | | Damping Factor | >400 (@1kHz, 8Ω) | | Total Harmonic Distortion (THD) | ≤0.1% (20 Hz - 20 kHz, 8Ω) | | Input Sensitivity | 0.775V / 1.0V / 1.44V (Selectable) | | Signal-to-Noise Ratio | >100 dB | | Input Impedance | 20kΩ (Balanced) / 10kΩ (Unbalanced) | | Crossover | 120 Hz (Low Pass / High Pass) | | Cooling System | 2-Speed Fan Control (starts slow, full speed at 50°C/120°F) | | Dimensions (W x D x H) | 482 mm x 453 mm x 88 mm (Standard 2U Rack-mountable) | | Weight | 28 kg / 61.7 lbs | | Protection Circuitry | Overload, Short Circuit, DC, Thermal, Soft Start |

When servicing an RX 4000 on the test bench, technicians generally focus on specific areas of the circuit diagram. nx audio rx 4000 circuit diagram

If the amplifier sounds clean at low volumes but severely distorts or clips prematurely at high volumes, the Class H switching MOSFETs or comparator circuitry may be faulty. Check if the high-voltage rails are successfully engaging when a large signal is injected into the input. Technical Specifications Snapshot Feature / Parameter Standard RX Series Operational Metrics Topology Class H (Multi-rail dynamic switching) Output Devices High-power complementary BJTs (Toshiba / ON Semi) Cooling System Dual variable-speed DC fans, front-to-back airflow Input Connections Balanced XLR & 1/4" TRS Jacks Output Connections Professional Speakon & Binding Post terminals Core Protections

The NX Audio RX 4000 is a high-performance, dual-channel power amplifier engineered for demanding professional audio applications, including concerts, clubs, and large-scale public address systems. Delivering massive power output—often exceeding 1000 Watts per channel into low-impedance loads—the RX 4000 relies on a highly efficient and robust circuit topology. What is the amplifier showing

: Thermistors on the heatsinks trigger variable-speed cooling fans and initiate thermal shutdown if temperatures exceed safety thresholds. 3. Common Troubleshooting and Repair Nodes

The circuit diagram includes a limiter section to prevent clipping and an input sensitivity selector (usually 0.775V, 1.0V, 1.4V). C. Class AB Output Stage This is where the audio signal is amplified. Check if the high-voltage rails are successfully engaging

The Class AB design is engineered for low distortion and high signal-to-noise ratio. D. Protection Circuits (Super Short Circuit Overload)

: Excessive 50Hz/60Hz hum in the audio signal or voltage sag under heavy bass loads.