FACTORY SYSTEM ADAPTERS ( LINE OUTPUT CONVERTERS )

The Down4Sound D4S-AX5S is engineered for car audio enthusiasts who want direct digital crossover control without complicated software. Unlike DSP processors that require apps or laptops, the AX5S gives you hands-on knob-based precision, letting you tune...

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...