Feature: 1. Function: This two channel level adapter converts your signal from your factory amps to enhance your bass output with high efficiency. 2. Practical: This dual channel line converter is easy to tune with main level, bass to reach your perfect bass frequencies that you are targeting. 3. High Performance: The adapter brings out even more bass output, and will avoid the interference of the conversion inside the amp. 4. Easy Installation: Simply connect the stereo's speaker wires to the line output converter's inputs, which is practical and energy saving. 5. Universal Fit: Suitable for your vehicle equalizer, amplifier, stereos system. Also works with home audio equipments like theater setup applications. Specification: Item Type: High Low Impedance AdapterMaterial: ABSFitment:Universal fit. Package List: 1 x Converter