Passive Line Output Converters

Add an aftermarket amplifier to any factory or aftermarket system quickly and cleanly with 12 Volt Outlet's selection of passive line output converters — the straightforward, no-power-required solution for converting speaker-level signals to RCA outputs.

Passive line output converters use a simple resistor network to step down the higher voltage speaker-level signal from your head unit or factory radio to the lower RCA line-level signal your amplifier needs. With no external power required and no complex wiring, passive LOCs are the easiest and most cost-effective way to add an amplifier to a system that doesn't have dedicated preamp outputs.

Passive LOCs are ideal for non-amplified factory systems and aftermarket head units without RCA preamp outputs — delivering a clean, reliable line-level signal without the added complexity of active conversion. Simple to install, compact in size, and built to handle a wide range of input voltages, they're a trusted go-to for straightforward amplifier integration on daily driver builds and budget-conscious installs.

We carry passive line output converters from trusted integration brands including Metra Axxess, PAC, Elite, and more — brands with a long track record of reliable, clean integration accessories for the professional installer and the serious DIY enthusiast alike.

Free shipping on orders over $100. Shop passive line output converters at 12 Volt Outlet today — and get your amplifier connected the right way.