While a single universal schematic may vary slightly by manufacturing year, the standard typically includes the following critical stages:
Class AB (though some variants or modules may utilize Class H or Class D depending on the specific series iteration).
Capable of delivering up to 3400W RMS at 4 Ohms in bridged configuration.
Features balanced XLR and 1/4-inch TRS jacks. This stage often includes a built-in crossover with Hi-Pass, Low-Pass, and Bypass options (fixed at approximately 160Hz), allowing users to optimize output for subwoofers or full-range speakers without external processors.
The RX 4000 serves as a "workhorse" in the NX Audio lineup, providing significant power output across multiple impedances. Its design prioritizes "zero noise" operation and high thermal stability.
Using imported, high-quality "Original" parts is recommended to maintain the amplifier's reliability rate, which is rated at over 97%.
Technicians often refer to the circuit diagram to address common issues like "shorting" or thermal shutdown.