Feature: 1. Main function: Audio signal adapter converts the speaker output frequency to low frequency output to the car amplifier or subwoofer. 2. Characteristic: Specially designed converter with gold plated RCA input or output connectors, line level output, lsolated muliple components to prevent ground loops. 3. Universal Application: High to low audio signal converter can be used for all large audio amplifiers and most other brands, dependable to use. 4. Simple Operation: Car audio system accessories, compact housing for easy installation, plug and play. Lightweight and portable, easy to carry and store. 5. Durable Material: Adopting premium ABS material, sturdy and durable, high temperature resistant, not easy to break, has a long service life. Specification: Item Type: High to Low Signal Converter Material: ABS Distortion: <0.001% Frequency Response: 20Hz-20KHz Applicable Models: Universal. Package List: 1 x Audio Signal Converter