NE5532 manufactured by headphone amplifier circuit

The NE5532 preamplifier is widely recognized for its excellent performance. It is now being utilized as a small power amplifier. While the general operational amplifier (op-amp) circuit remains similar, there are notable changes in some resistors and capacitors, leading to differences in performance compared to standard op-amp circuits. Experiments have demonstrated that the NE5532 excels in small power amplification. Additionally, the circuit includes an input resistor R1 (R6) of 51K, which helps manage volume levels when using headphones. Removing R1 (R6) allows for better performance with smaller speakers, such as five-inch drivers. Previous documentation indicates that this configuration is also effective for bedside listening.

The NE5532 is a dual low-noise operational amplifier that is often used in audio applications due to its high performance and low distortion characteristics. In the context of a small power amplifier, the NE5532 can be configured to drive low-impedance loads effectively, making it suitable for use with headphones and small speakers.

In a typical circuit configuration, the NE5532 is connected in a non-inverting amplifier configuration. The input signal is fed into the non-inverting terminal, while feedback is provided through a network of resistors and capacitors. The resistor R1 (51K) plays a critical role in controlling the gain of the amplifier. By adjusting this resistor, the gain can be set to a level that is suitable for either headphone listening or driving small speakers.

The use of capacitors in the circuit is also essential. Coupling capacitors are typically used at the input and output stages to block DC offsets and allow only the AC audio signal to pass through. This ensures that the amplifier operates within its optimal range without distortion caused by DC levels. Additionally, bypass capacitors may be placed near the power supply pins of the NE5532 to filter out any noise and provide stable operation.

Overall, the NE5532, when configured as a small power amplifier, demonstrates versatility and effectiveness across various audio applications, from headphone amplification to driving small speakers, making it a valuable component in modern audio electronics.NE5532 preamp generally used, performance is very good. Now used as a small power amplifier, how effective And the general op-amp circuit is almost the same, but one of the resistors, capacitors have a greater change, the state and not the same op-amp circuit. Experiments show NE5532 for small power amplifier, excellent performance. In addition, the series with the input R1 (R6) 51K, because the volume when listening with headphones too, if you remove R1 (R6) can be accessed by five inches below the small horn, before documented, bedside listening was also very effective.