1. This negative grounding wire junction box for car audio amplifier modification is exquisitely designed. It is made of zinc alloy material and weighs only 0.145 kilograms, which ensures a certain degree of sturdiness and is also easy to install and carry. 2. It has a wide range of applications, suitable for multiple fields such as electronics, power, machine tools, instruments, transportation systems, and cars. In the field of car audio modification, it plays an important role in helping to optimize the grounding of the audio system and improve the sound quality performance. 3. The dimensions of this junction box are 48 * 58 * 30 millimeters. It is small in size and does not take up much space, so it can be flexibly installed in a suitable position. Its working voltage range is 12 to 48 volts, the power is 10 watts, and the signal - to - noise ratio is 10 decibels. It can stably provide a good grounding environment for the equipment to ensure the stable operation of the equipment. 4. It is worth mentioning that it has a wide applicability to vehicle models. It can be easily adapted to various types of vehicles, providing convenience for your car audio modification. In addition, it has an authorized self - owned brand, which guarantees the quality and makes you more confident in using it. It is sold in regions such as Africa, Europe, South America, Southeast Asia, North America, Northeast Asia, and the Middle East, and is well - received by users in different places. This junction box adopts a specification design with a black base and a transparent part, which is simple and practical.