Nx Audio Rx 4000 Circuit Diagram

The NX Audio RX 4000 is a professional 2-channel Class AB power amplifier known for its durability in adverse power conditions. While a full manufacturer-issued circuit diagram is typically proprietary, technical documentation describes its architecture as featuring bipolar junction transistors and power MOSFETs designed for high stability at 2-ohm loads. Circuit & Design Features

A critical part of the RX 4000's circuit design is its protection logic, which ensures the unit survives harsh touring environments: Short Circuit Protection nx audio rx 4000 circuit diagram

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Signal Monitoring: Front-panel indicators for Peak, Level, and Signal status. Technical Specifications Specification Output Power (2Ω) 1550W + 1550W RMS Output Power (4Ω) 1150W + 1150W RMS Bridge Mono (8Ω) 2000W - 2400W Damping Factor S/N Ratio Frequency Response 20Hz – 20kHz Operating Modes Stereo, Bridge, Parallel The NX Audio RX 4000 is a professional

1. Power Supply Tracing: The RX 4000 uses a push-pull SMPS (Switched-Mode Power Supply). The diagram shows you exactly where the +15V and -15V rails for the op-amps originate.
2. Output Transistor Identification: This amp uses multiple pairs of power MOSFETs (often IRFZ44N or similar). The schematic shows which pin (Gate, Drain, Source) corresponds to which channel.
3. Protection Circuit Logic: The dreaded "Protect" mode is often triggered by DC offset or thermal issues. The diagram reveals the comparator ICs (like LM393 or LM311) that control the protection relay.
4. Signal Path: You can follow the audio signal from the RCA input jacks, through the preamp stage, to the crossover filters, and finally to the power amp section.

1. Power Supply: The power supply section is responsible for converting AC power from the mains to DC power for the amplifier's circuitry. This section typically includes components such as transformers, rectifiers, and capacitors.
2. Input Stage: The input stage is where the audio signal is received and processed. This section usually consists of input connectors, gain switches, and input buffer amplifiers.
3. Pre-Amplifier Stage: The pre-amplifier stage amplifies the audio signal to a level sufficient for the power amplifier stage. This section often includes components such as operational amplifiers, resistors, and capacitors.
4. Power Amplifier Stage: The power amplifier stage is responsible for driving the speakers. This section typically consists of power transistors, heat sinks, and output filters.
5. Protection Circuitry: The protection circuitry is designed to safeguard the amplifier from overloads, short circuits, and other fault conditions. This section may include components such as fuses, circuit breakers, and protection relays.

The RX 4000 utilizes a Class AB circuit architecture, which is valued for its balance between thermal efficiency and high-fidelity audio output with "zero noise" performance. Power Supply Tracing: The RX 4000 uses a

Introduction to the NX Audio RX 4000

• Mains Input & Filtering: The AC inlet connects to a fuse holder and a mains switch. Immediately following this is an EMI (Electromagnetic Interference) filter, usually consisting of a line filter choke and X/Y class capacitors, designed to prevent radio frequency noise from entering or leaving the amplifier.
• Transformer: The RX 4000 utilizes a large toroidal or EI transformer. On the diagram, you will see two secondary windings.