Audio amplifier dedicated

Aluminum electrolytic capacitors are widely used in audio power amplifiers, mainly for power supply filtering, signal coupling and decoupling, etc. The following are some special characteristics and selection suggestions for aluminum electrolytic capacitors in audio amplifier:

Capacitance and withstand voltage：

• capacitance: Select the appropriate capacitance according to the specific circuit requirements. Power amplifier power filtering generally requires a large capacity (thousands of microFaram or even higher).
• Withstand voltage value: Choose a capacitor with a withstand voltage value 20-30% higher than the actual voltage to ensure safety and life.

Low ESR (equivalent series resistance): Low ESR capacitors can more effectively filter out high-frequency clutter, improve sound quality, and reduce noise and distortion in the power amplifier circuit.

High ripple current capability: Audio power amplifiers require high power stability, and capacitors with high ripple current capability can handle larger current fluctuations and improve the dynamic response of the power amplifier.

Temperature stability: Choose a capacitor with a wide temperature range (such as -40°C to 105°C) to ensure stable operation in various environments.

Application example

Power amplifier power supply filter capacitor: Selecting a low ESR capacitor of 4700 µF/63V can significantly improve the sound quality and power stability of the power amplifier.

Audio signal coupling capacitor: Choose a 10 µF/25V capacitor, which has good audio characteristics and can effectively reduce signal distortion.