Precise ohmic interface matching: supports 4Ω and 8Ω impedance adaptation, minimizes resistance and provides precise impedance matching for clear and stable signal transfer between the amplifier and the loudspeaker unit HiFi component configuration: built with metal film capacitors and large power resistors; frequency response 20 Hz to 20 kHz; total harmonic distortion ≤ 0.5% power handling: 300 W power capability; suitable for home loudspeakers, car modification, and other scenarios requiring reliable power delivery Integrated junction box design: combines solderless terminal blocks with anti short circuit protection covers; supports quick insertion and installation and simplifies the modification process Use scenarios Home audio systems: improves impedance matching and signal clarity between amplifier and bookshelf or floorstanding loudspeakers in living rooms Car audio modification: suitable for upgrading car stereos to enhance stability and impedance compatibility DIY projects or professional installations: convenient for hobbyists and installers needing fast, protected connections during modifications