Conversion Function: This car speaker converter adopts a dual-channel independent high-to-low design, which is usually used for high-frequency to low-frequency output, which helps to adjust the power output of the amplifier and enhance the bass. | Package List: This car speaker converter uses noise reduction filter capacitors, stable performance and high precision. It can be used to connect the car high-power amplifier or subwoofer signal input. After purchase, you will receive 2 x car speaker converters, which are enough for daily use. | Multi-purpose: This car speaker converter is suitable for machines without audio output of the original car player. It is used to install the amplifier and subwoofer, and convert the high-frequency speaker signal output by the CD into a low-frequency audio signal for the amplifier or subwoofer. | Installation Instructions: The green wire is connected to the negative pole of the left channel, the yellow wire is connected to the positive pole of the left channel, the gray wire is connected to the negative pole of the right channel, the purple wire is connected to the positive pole of the right channel, and the black wire is grounded. | Durability: This car speaker converter adopts a transparent shell design with exquisite workmanship. It can be used for hosts without low-frequency (RCA) output (cassette players, card players, CD/VCD/DVD, etc.). If you have any questions about use, please feel free to contact us directly.