FACTORY SYSTEM ADAPTERS ( LINE OUTPUT CONVERTERS )

The Down4Sound D4S AX5S 5 Way Digital Crossover is designed for car audio enthusiasts and professional installers who want precise system control without the complexity of software based DSP processors. Instead of relying on apps, laptops, or layered...

The Down4Sound HiLoc7i 7-Channel Line Output Converter is the easiest way to add aftermarket amplifiers and subwoofers to your factory stereo. Engineered for clean integration, the HiLoc7i accepts your OEM high-level (speaker) signals and delivers strong...

Engineered for Automotive, Marine, and Powersports Use The D4S EZY BT2HD is a high-definition Bluetooth 5.0 audio receiver built around the Qualcomm® QCC3034 chipset with support for APTX-HD. Designed for clear, distortion-free playback, it delivers...

Upgrade your car's audio system with the HiLo 5 5-Channel Lineout Converter. This aftermarket kit is designed to easily integrate factory wiring into your car audio system, providing a 5-channel HI to LOW Signal Conversion that ensures compatibility with...

The Down4sound EZ SNI-35 2V is a 2 channel lineout converter, this 2ch lineout is a handy device to have in your car when integrating aftermarket Bass into the factory system. The EZ sni-35 lineout converter takes the speaker level signal from the car's...