Overcurrent protection device provides reliable protection against overload, contributing to durability and a long service life. The volume section uses a famous German noninductive capacitor (100V, 1.5uF) in parallel with a power nonpolar capacitor; the lowfrequency portion is shaped by inductance to achieve a clear and full sound. The PCB bottom plate is made of fireproof board, keeping the layout clear and clean. Circuit corners are rounded for safety and reliability, and the thick copper layer supports current. Polypropylene film capacitors and temperatureresistant wire inductors are used, ensuring large carrying power, longterm durability, and very good sound quality. Use scenarios In home audio systems as part of a current amplifier or speaker crossover to deliver strong, clean bass and stable performance. In professional audio installations (live sound or studio monitoring) where durable components and reliable lowfrequency handling are required. In automotive audio systems to maintain consistent performance under varying temperatures and current demands.