12W NE5534 Audio Amplifier Circuit Diagram

Description

This modest audio amplifier delivers exceptional sound quality. It incorporates a high-performing integrated circuit, the NE5534, which offers control over light loads, rapid response times, minimal distortion, and two V-MOSFET transistors at its output. Replacement of component IC1 is possible with alternative equivalents, accompanied by an increase in the power supply voltage at the output stage, while meticulously maintaining the supply voltage levels to those specified for IC1, thereby maximizing the delivered output power. Operation in stereo mode is planned for implementation utilizing two separate units.

NE5534

The NE5534 is a widely-used operational amplifier renowned for its robustness and versatility. It’s characterized by its ability to manage low loads efficiently, respond quickly to changes in signal, and produce minimal harmonic distortion. Its two V-MOSFET output transistors provide substantial current drive capability. It’s a dependable choice for various audio applications where precise control and low distortion are critical.

Circuit diagram

Circuit diagram

Specifications

  • Output Power - 12W in 8Ω (maximum)
  • Input Sensitivity - 3.2V rms (maximum)
  • Total Harmonic Distortion (THD) - 0.002% (1kHz)
  • Frequency Response - DC - 100 kHz (-3dB)

Part List

  • R1= 33Kohm
  • R2= 6.8Kohm
  • R3= 22Kohm
  • R4= 100Kohm
  • R5-7= 1Kohm
  • R6= 330ohm
  • R8-11= 10Kohm
  • R9-10= 0.47ohm 2W
  • C1= 1nF 63V
  • C2-5= 47uF 40V
  • C3-4= 100nF 63V
  • C6= 4.7pF ceramic
  • C7-8= 100uF 40V
  • D1-2= 18V 0.5W zener
  • D3-4= 1N4148
  • IC1= NE5534
  • Q1= 2SK135
  • Q2= 2SJ50