KICKER 46KISLOAD4 Interface to Add Aftermarket Amplifier to Factory Audio System

The Kicker 46KISLOAD4 is a smart-radio interface that lets you add an aftermarket full-range amplifier to a high-power factory audio system. Many late-model radios watch their speaker outputs for a steady level of resistance, called a load. Tap those outputs for an amplifier and the radio can read the change as a fault and shut the audio off mid-trip. The 46KISLOAD4 holds a consistent 25-ohm load so the radio keeps seeing what it expects and the music keeps playing for the entire ride. 4 channels handle inputs up to 20 volts, which covers factory systems passing as much as 100 W. All factory radio functions keep working: steering wheel buttons, chimes, navigation prompts, and hands-free calling stay intact, because the interface sits alongside the factory wiring instead of replacing it. The housing is extremely compact, so it tucks behind a dash panel or zip-ties to the harness near the radio with no bracket and no hunting for a mounting location. This is the piece that turns a factory-amplified system into a foundation you can build on: keep the stock head unit, the stock display, and every stock feature, and still add the output a real amplifier brings. For a mono subwoofer amplifier install, the KISLOAD2 is the matching part.