The Class AB output stage increases current to the required levels.
When repairing an NX Audio RX 4000 using its service manual or schematic, technicians typically look at a few common failure points:
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The RX 4000 circuit utilizes a multi-rail power supply setup (typically Low-Voltage and High-Voltage rails, noted as ±V1plus or minus cap V sub 1 ±V2plus or minus cap V sub 2 nx audio rx 4000 circuit diagram
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The is a professional-grade 2-channel Class AB power amplifier designed for high-reliability sound reinforcement. While a full, high-resolution internal schematic is often proprietary to Nx Audio , technical documentation and service manuals highlight a robust architecture centered on a pure copper transformer with a silicon steel-sheet core to minimize electromagnetic loss. Circuit Overview & Architecture
The RX-4000 can be visualized in four main sections. While channels A, B, C, and D are distinct, Channels A/B and C/D often share power supply rails. The Class AB output stage increases current to
: If the protection LED stays illuminated, check for offset voltage at the speaker terminals before the relay stage. This indicates a unbalanced breakdown in the push-pull stages.
: Excessive 50Hz/60Hz hum in the audio signal or voltage sag under heavy bass loads.
Traditional, stable Class AB circuit design, ensuring low distortion and high fidelity. This link or copies made by others cannot be deleted
: If the Class H MOSFETs short out, the amplifier may stuck on the high rail, overheating quickly even at idle.
: Distortion at high volumes or failure to reach full rated power.
| Pin | Signal | Connection to Source | | :--- | :--- | :--- | | Pin 1 | Cable Shield / Ground | Connect to the ground/shield of your mixer or processor's XLR output. | | Pin 2 | Positive (+) / Hot | Connect to the positive (+) pin of the source XLR. | | Pin 3 | Negative (-) / Cold | Connect to the negative (-) pin of the source XLR. |
The power supply section of the NX Audio RX 4000 circuit diagram is responsible for providing a stable and regulated DC power supply to the amplifier's circuitry. The power supply consists of:
To increase efficiency, the RX 4000 uses a multi-tiered voltage rail system (e.g., Low Volt ±plus or minus V1 and High Volt ±plus or minus